JP2575587B2 - Display device of receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device of a receiver for high-frequency communication for displaying signal intensities of a plurality of frequencies.

[0002]

2. Description of the Related Art FIG. 2 shows a conventional radio receiver having a spectrum display function. In FIG. 2, a high-frequency signal received by an antenna 100 is input to a mixer 102 via a high-frequency amplifier (hereinafter, referred to as an RF amplifier) 101, and then mixed with a local oscillation signal generated by a local oscillator 103. The frequency is converted to a predetermined intermediate frequency signal (hereinafter, referred to as an IF signal). This IF signal is transmitted through an intermediate frequency amplifier (hereinafter, referred to as an IF amplifier) 104 to the F signal.
After being input to the M demodulator 105 and subjected to FM demodulation, the demodulated low-frequency signal is output to a speaker 107 via a low-frequency amplifier (hereinafter, referred to as an AF amplifier) 106. The IF signal output from the IF amplifier 104 is subjected to envelope detection by a detection circuit 108 and then output to a signal level meter 109, whereby the signal level of the received high-frequency signal is displayed on the signal level meter 109. Is done.

On the other hand, an IF signal is input to a mixer 110 and then mixed with a swept local oscillation signal generated by a swept local oscillator 111 at a predetermined sweep frequency width to form a swept IF signal having the above sweep frequency width. Frequency conversion is performed.
This swept IF signal is envelope-detected by a detection circuit 113 via a slope IF amplifier 112, and the detected signal is
It is input to the vertical axis input terminal of the RT display 114. Further, the swept local oscillation signal output from the swept local oscillator 111 is input to a horizontal sweep signal generator 115 including a PLL circuit, and the generator 115 is used for a CRT display 114 synchronized with the input swept local oscillation signal. Of the CRT display 11
4 is input to the input terminal of the horizontal axis. This gives C
On the RT display 114, a frequency spectrum of the signal received by the antenna 100 in the predetermined sweep frequency width around the center frequency of the received high-frequency signal is displayed.

Accordingly, the circuits and devices denoted by reference numerals 110 to 115 constitute a so-called spectrum analyzer for displaying a frequency spectrum, and a low frequency signal of a modulated wave included in a received high frequency signal is transmitted to the speaker 1.
While listening at 07, it is possible to observe the frequency spectrum of the frequency of the high-frequency signal and a signal of a frequency in the vicinity thereof.

[0005]

However, in the conventional radio receiver having a spectrum display function, R
An original signal receiving circuit for receiving a high-frequency signal of a first reception frequency from the F amplifier 101 to the IF amplifier 104;
The first and second receiving frequencies of a receiving circuit for receiving a swept high frequency signal of a second receiving frequency including another local oscillator 111 from the RF amplifier 101 to the scope IF amplifier 112 for spectrum display are set. Since two receiving circuits for receiving are provided, there is a problem that the circuit is complicated and the manufacturing cost is high. In a conventional radio receiver with a spectrum display function,
Since the local oscillator 111 and the local oscillator 115 operate in cooperation with each other, it is possible to observe the signal strength of the frequency continuously adjacent to the output signal of the mixer 102, but the signal strength of a plurality of discretely set frequencies is measured. It was impossible to observe.

Further, in the conventional receiver having a spectrum display function, when the reception frequency is changed, the reception position corresponding to the display position must be changed even though the display position of the spectrum after the frequency change must be changed. Until the signal strength of the frequency is observed, there is an inconvenience that the signal strength of the frequency before the frequency change is displayed.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to display the signal strength of a plurality of frequencies that are a part of the reception frequencies of all the plurality of frequencies that can be received by a receiver. Another object of the present invention is to provide a display device of a receiver capable of shifting and changing the display positions of the signal intensities of the plurality of frequencies in response to the change of the reception frequency.

[0008]

According to a first aspect of the present invention, there is provided a display apparatus of a receiver for receiving a high-frequency signal at a predetermined reception frequency, wherein the reception frequency is arbitrarily set. And selectively detecting and storing the signal strengths of the received N received frequencies that are a part of all of the received frequencies that can be received by the receiver. Detection storage means, and a plurality of N display units respectively corresponding to the plurality of N reception frequencies are arranged side by side, and the signal intensities of the stored plurality of N reception frequencies are respectively corresponded to the switching order. Display means for displaying on the plurality of N display units; and signal strengths of the plurality of N reception frequencies stored in the detection storage means corresponding to the change of the reception frequency, one each. After the display position of the signal strength of the plurality of N reception frequencies displayed on the display means is shifted, when the signal strength of the reception frequency is shifted, one signal strength By detecting and storing the signal strength of the new reception frequency at which the data of one signal strength becomes empty while the data is lost, the signal strength of the new reception frequency is stored in one end of the plurality of N display units. And control means for controlling the display to be performed on one display unit located at

The display device of the receiver according to the second aspect is the display device of the receiver according to the first aspect, wherein the detection storage means includes a predetermined step. The reception frequency is switched in ascending order or descending order by frequency.

[0010]

With the above arrangement, in the display device of the receiver according to the first aspect, the detection storage means selectively switches the reception frequency in an arbitrarily set switching order. Detecting and storing the signal strengths of the received N received frequencies that are a part of all of the plurality of received frequencies that can be received by the receiver; And a plurality of N display units respectively corresponding to the received frequencies are displayed side by side, and the stored signal intensities of the plurality of N received frequencies are displayed on the plurality of N display units in accordance with the switching order. . Further, the control means shifts the signal intensities of the plurality of N reception frequencies stored in the detection storage means one by one in response to the change of the reception frequency, thereby displaying on the display means. Multiple N
After shifting the display position of the signal strength of
Detecting and storing the signal strength of a new reception frequency at which the data of one signal strength is lost while the data of one signal strength becomes empty when the signal strength of the reception frequency is shifted. Thus, the signal strength of the new reception frequency is controlled to be displayed on one of the plurality of N display units located at one end. Thereby, in the plurality of display units of the display means, the signal intensities of the plurality of reception frequencies are respectively displayed according to the switching order, and the signal intensities of the plurality of frequencies are displayed in response to the change of the reception frequency. The display position can be changed by shifting. When the signal strength of the reception frequency is shifted, data of one signal strength is lost in the detection storage means.
Detecting and storing the signal strength of the new reception frequency at which the data of the two signal strengths becomes vacant, the signal strength of the new reception frequency is displayed on one display unit located at one end of the plurality of N display units. Can be displayed.

Further, in the display device of the receiver according to the present invention, the detection storage means switches the reception frequency at a predetermined step frequency in an ascending order or a descending order. Thereby, in the plurality of display units of the display unit, the signal strengths of the plurality of reception frequencies correspond to the switching order,
That is, for example, they are displayed side by side at intervals of the step frequency. Further, the display positions of the signal intensities of the plurality of frequencies can be shifted and changed at the step frequency in response to the change of the reception frequency.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a wireless transceiver having a function of displaying signal levels of a plurality of frequencies according to an embodiment of the present invention.
It is a block diagram of. The wireless transceiver of this embodiment has the following operation modes.

(A) VFO mode / memory channel mode The "VFO mode" is an operation mode in which the transmission / reception frequency is set as follows. Rotary encoder 31
When setting the reception frequency fset = f _R by turning the dial, VFO (Variable Frequency Oscillator:. In this embodiment, specifically, to refer to the local oscillator 4) with said set reception frequency f A local oscillation signal having a local oscillation frequency f _L corresponding to _R is generated. Here, when the dial of the rotary encoder 31 is rotated clockwise, the local oscillation frequency f _L increases at every preset step frequency Δf. Direction, which changes the transmission / reception frequency f _R. Also, the rotary encoder 31
When the dial is rotated counterclockwise, the local oscillation frequency f _L changes in the descending direction at every preset step frequency Δf, and thereby the transmission / reception frequency f _R changes. Alternatively, instead of using the dial of the rotary encoder 31, when a transmission / reception frequency is directly input using the numeric keypad 32, a local oscillation signal having a local oscillation frequency f _L corresponding to the input transmission / reception frequency f _R. was generated by a local oscillator 4, transmission and reception frequencies fset = f _R is set.

On the other hand, "memory channel mode"
Is to store in advance a plurality of transmission / reception frequencies in a memory in the MPU 30 in association with each memory channel number, and to designate one channel number using the rotary encoder 31 or the numeric keypad 32, thereby setting the corresponding transmission / reception frequency fset = f _This is the operation mode for setting _R.

(B) Normal Mode / Search Mode The “normal mode” is an operation mode for transmitting and receiving signals using the speaker 13 and the microphone 21 without displaying the levels of the signal intensities at a plurality of frequencies. On the other hand, the “search mode” is an operation mode for displaying signal levels of received signals of a plurality of frequencies on a matrix display section 61 of a liquid crystal display (hereinafter, referred to as an LCD) 60. Note that the signal strength level is simply referred to as a signal level.

(C) Receivable Mode / Receivable Mode This operation mode is effective only when the above-mentioned search mode is set. On the other hand, the “reception disabled mode” is an operation mode set so that the speaker 13 cannot receive a received signal.

(D) Normal mode / scan search mode The "normal mode" is the same as the normal mode of (c) above, and does not display the signal strength levels of a plurality of frequencies.
This is an operation mode for transmitting and receiving using the speaker 13 and the microphone 21. On the other hand, the “scan search mode” is an operation mode for displaying the signal levels of the reception signals of a plurality of frequencies on the matrix display section 61 of the LCD 60. 33 automatically for each step frequency set using
It is called upward. ) Or changing to a lower direction (hereinafter referred to as “downward”).
Is repeated until the transmission frequency is canceled, thereby shifting the signal level data of the reception signals of a plurality of frequencies stored in the VRAM 40 in response to the change of the transmission / reception frequency. The display position of the signal level of the received signal is sequentially shifted upward or downward in frequency and displayed. When setting the upward scan search mode,
Normal mode / scan search mode switch SW5
After turning on, the rotary encoder (hereinafter abbreviated as RE in the drawings) 31 is turned clockwise (upward in frequency) or counterclockwise (downward in frequency) as viewed from above. Hereinafter, the rotation direction of the rotary encoder 31 is indicated by the rotation direction viewed from above.

The radio transceiver with a signal level display function of a plurality of frequencies according to the present embodiment
After the F signal is detected by the detection circuit 19, the analog /
The data is converted into digital data by a digital converter (hereinafter, referred to as an A / D converter) 20, and the converted data is taken into a microprocessing unit (hereinafter, referred to as an MPU) 30 as signal level data SLD.
In the search mode and in the receiving state, the signal level data SLD is fetched while the local oscillation frequency f _L of the local oscillator 4 is sequentially changed, and the corresponding level display data is written into the VRAM 40, whereby the transmission / reception frequency f _R While listening to and receiving the low frequency signal of the modulated wave of the high frequency signal with the speaker 13, the signal levels of a plurality of frequencies centered on the signal level of the transmission / reception frequency f _R are displayed on the matrix display unit 61 of the LCD 60. And

Here, when the VFO mode and the search mode are set, the LCD 6 for displaying signal levels of a plurality of frequencies is displayed.
0 is the step frequency Δf of the VFO mode preset in the radio transceiver.
In this embodiment, the frequency (f _R −3Δ) is viewed from the left when facing the matrix display unit 61 of the LCD 60.
f), frequency (f _R -2Δf), frequency (f _R -Δf),
Transmission / reception frequency f _R , frequency (f _R + Δf), frequency (f _R
+ 2Δf) and frequency (f _R + 3Δf) are displayed. On the other hand, in the memory channel mode and the search mode, when the currently set channel is the channel number m, in this embodiment, the channel number (m−3) from the left toward the matrix display section 61 of the LCD 60 Frequency,
Channel number (m-2) frequency, channel number (m-1) frequency, channel number m frequency, channel number (m + 1) frequency, channel number (m +
It is characterized in that each signal level of the frequency 2) and the frequency of the channel number (m + 3) is displayed.

Further, in the receiving state, the signal level display of a plurality of frequencies indicating the signal levels related to the high frequency signals of the seven frequencies, which change in the vertical direction, is performed on the matrix display section 61 of the LCD 60 in the search mode as described above. In the normal mode, the signal level of the high-frequency signal being received, which changes in the horizontal direction, is displayed using the pixels in the lowermost 2 rows and 7 columns of the matrix display unit 61.

Further, the transceiver of this embodiment sets the transmission / reception frequency by setting the scan search mode.
Automatically changing the frequency upward or downward for each step frequency set using the step frequency selection key 33 is repeated until the scan search mode is released. By shifting the signal level data of the reception signal, the display position of the signal level of the reception signal of a plurality of frequencies is sequentially shifted upward or downward in frequency in accordance with the change of the transmission / reception frequency. Features. When the transmission / reception frequency is changed in the upward direction in the scan search mode, the signal level of the transmission / reception frequency is displayed in the center instruction liquid crystal display unit 6 in FIG.
After being shifted to the right end of the matrix liquid crystal display section 61 indicated by 3b, the transmission / reception frequency is sequentially scanned upward, so that the corresponding signal level display position is left as shown in FIG. In the same direction. On the other hand, when changing to the downward direction, the display of the signal level of the transmission / reception frequency is shifted to the left end of the matrix liquid crystal display 61 indicated by the center instruction liquid crystal display 63c in FIG. Since the frequency is sequentially scanned downward, the display position of the corresponding signal level is sequentially shifted rightward as shown in FIG.

Further, the transceiver of the present embodiment rotates the rotary encoder 31 clockwise or counterclockwise in the VFO mode and the search mode, so that the rotation frequency (the rotary encoder 31 is approximately The transmission / reception frequency is shifted upward or downward according to the clip point at every 30 °, and the rotation frequency increases each time the clip point is passed. By shifting the data of the signal levels of the received signals of a plurality of frequencies in the search mode described above, the matrix display 61 of the LCD 60 is shifted.
In which the display positions of the signal levels of the received signals of a plurality of frequencies are shifted and displayed. This behavior
The “scan search mode” that is automatically performed is referred to as a manual scan search.

First, the configuration of the wireless transceiver with a signal level display function for a plurality of frequencies shown in FIG. 1 will be described.

In FIG. 1, in the receiving state, a high-frequency signal received by the antenna 100 is input to the mixer 3 via the common terminal c of the transmission / reception changeover switch 10 and the contact a thereof, and further via the RF amplifier 2, and An IF signal having a predetermined intermediate frequency f _IF (f _IF = f _R −f _L in the present embodiment) mixed with a local oscillation signal having a local oscillation frequency f _L generated by the oscillator 4. After the frequency conversion, the signal is input to a limiter amplifier 7 and a detection circuit 19 via a band-pass filter (BPF) 5 that passes only the IF signal and an IF amplifier 6. here,
The local oscillator 4 includes a PLL circuit, generates a local oscillation signal having the local oscillation frequency f _L based on the local oscillation frequency data Df _L output from the MPU 30, and outputs the signal to the mixer 3 and the mixer 24. The transmission / reception switch 10 is selectively switched to the contact a side or the contact b side based on a transmission / reception switching signal (hereinafter, referred to as a TRSW signal) output from the MPU 30. Where TRS
When the W signal is at the L level (in the flowchart, control data “0” in the MPU 30 is indicated by “0”). The changeover switch 10 is switched to the contact “a” to put the wireless transceiver in a receiving state, while the TRSW signal is turned on. When the level is at the H level (in the flowchart, it is indicated by control data “1” in the MPU 30), the changeover switch 10 is switched to the contact b side, and the wireless transceiver enters a transmission state.

The IF signal input to the detection circuit 19 is subjected to envelope detection and then converted into digital data by an A / D converter 20. The signal level data SLD proportional to the signal level of the received high-frequency signal is converted to an MPU 30 Is input and imported. On the other hand, the limiter amplifier 7 limits the amplitude of the input IF signal to a predetermined amplitude level,
Output to the demodulator 8. The FM demodulator 8 FM-demodulates the input IF signal to extract a low-frequency signal of the modulated wave.
Low pass filter (LPF) 9 and squelch switch 11
And to the speaker 13 via the AF amplifier 12.
The signal output from the FM demodulator 8 and having a higher frequency than the low-frequency signal, including triangular noise, passes through a high-pass filter (HPF) 14, a squelch adjusting attenuator 15, and a noise amplifier 16 to a detection circuit 17 Is input to The detection circuit 17 detects a noise component output from the FM demodulator 8 and outputs the detected noise component to the waveform shaping circuit 18.

The waveform shaping circuit 18 compares the input noise component with a predetermined threshold level to detect a modulated wave signal to be received when the noise component is equal to or higher than the threshold level. It is determined that the signal cannot be output, and an H level SD (signal detection) signal is output to a control terminal of the squelch switch 11 as a squelch signal (hereinafter referred to as an SQ signal) via a first input terminal of the OR gate OR1. The squelch switch 11 is turned off, thereby preventing the low frequency signal after the FM demodulation from being output from the speaker 13. The SD signal output from the waveform shaping circuit 18 is also input to the MPU 30. on the other hand,
When the noise component is less than the threshold level, the waveform shaping circuit 18 determines that the noise component is sufficiently low, and controls the squelch switch 11 via the first input terminal of the OR gate OR1 by determining the L level SD signal. The squelch switch 11 is turned on by outputting the signal to the terminal, whereby the low frequency signal after the FM demodulation is output from the speaker 13. further,
The MPU 30 controls the squelch switch 11 via a second input terminal of the OR gate OR1 with an H level forced squelch signal (hereinafter, referred to as an ESQ signal) for forcibly turning off the squelch switch 11 as described later. Output to terminal.

In the flowchart, the H level ESQ signal is indicated by control data "1" in the MPU 30, and the L level ESQ signal is indicated by control data "0" in the MPU 30. The same applies to the H level SD signal.

On the other hand, in the transmission state, the microphone 21
After the input speech signal is inputted to the FM modulator 23 via the AF amplifier 22, the FM modulator 23 is a carrier signal of the IF signal having a predetermined intermediate frequency frequency f _IF, the input speech signal FM-modulates and outputs the IF-modulated IF signal to the mixer 24. The mixer 24
The signal and the local oscillation signal are mixed to generate a high-frequency transmission signal equal to the frequency f _R and output to the antenna 1 via the power amplifier 25 and the contact b and the common terminal c of the transmission / reception switch 10. And radiate the transmission signal.

The MPU 30 is a control circuit for controlling the overall operation of the radio transceiver and the display operation of the LCD 60. R that stores
It includes an OM and a RAM that is used as a work area when executing the control program and stores current data of various signals and flags. In addition, the MPU3
To 0, a rotary encoder 31 for setting the transmission / reception frequency and the memory channel number by rotating the knob.
, The transmission / reception frequency and the memory channel number are directly input, and the standby processing described later (step S246)
Is connected to a numeric keypad 32 for performing various control settings such as a standby time Tw seconds in. Here, the transmission / reception frequency set by the rotary encoder 31 or the numeric keypad 32 is set as set frequency data fset and stored in the RAM in the MPU 30. Also, the standby time Tw seconds is set by the numeric keypad 32, and is similarly stored in the RAM in the MPU 30.

Further, the MPU 30 stores a step frequency Δf which is a frequency of a change step of the transmission / reception frequency in the VFO mode, for example, at 1 kHz, 5 kHz, 10 kHz.
Hz, 20 kHz, and 25 kHz, a step frequency setting key 33 for selectively setting one of them is connected, and data of the step frequency Δf set by the key 33 is MP
Input to U30. The other end of the frequency change unit changeover switch 34 whose one end is connected to the ground is connected to the MPU 30. Each time the switch 34 is turned on, a unit for changing the transmission / reception frequency using the rotary encoder 31 is defined as a step frequency. It is selectively changed and set between the step frequency Δf selected by the selection key 33 and 1 MHz.

Further, the MPU 30 is connected to the ground via the following five switches. (A) PTT (Push To Talk) switch SW1: This is a switch for putting the wireless transceiver in a transmission state and transmitting an audio signal, and enters a transmission state when turned on. (B) VFO mode / memory channel mode switch SW2: a switch for selectively switching between the VFO mode and the memory channel mode. Each time the switch is turned on, the VFO mode and the memory channel mode are alternately switched. (C) Normal mode / search mode switch SW
3: A switch for selectively switching between the normal mode and the search mode. Each time the switch is turned on, the normal mode and the search mode are alternately switched. (D) Receivable mode / non-receivable mode switch SW4: a switch that is effective only in the search mode and selectively switches between the receivable mode and the non-receivable mode. The possible mode and the unreceivable mode are alternately switched. (E) Normal mode / scan search mode switch SW5: A switch for selectively switching between the normal mode and the scan search mode. Each time the switch is turned on, the normal mode and the scan search mode are alternately switched.

FIG. 3 is a front view when all the liquid crystal pixels are displayed on the LCD 60. As shown in FIG. 3, a matrix liquid crystal display in which liquid crystal pixels LM00 to LM63 (see FIG. 4), each of which is a rectangular liquid crystal pixel and arranged in a matrix of 4 rows and 7 columns, is arranged in the upper central portion of the LCD 60. Section 61 is provided, and each liquid crystal pixel LM00-L in the lowermost row of the matrix liquid crystal display section 61 is provided.
In the vicinity immediately below M60, there are provided reference instruction liquid crystal pixels 62 each having a horizontal line shape and always showing a display position and a reference level when displaying signal levels of a plurality of frequencies.
On the other hand, a center pointing liquid crystal display 63a having the shape of a downward arrow is provided near the upper part of the liquid crystal pixel LM33 in the upper center of the matrix liquid crystal display 61. Also, a liquid crystal pixel LM6 at the upper right end of the matrix liquid crystal display section 61
A center pointing liquid crystal display 63b having the shape of a downward arrow is provided in the vicinity of the upper side of 3 and the shape of the downward arrow is provided in the vicinity of the upper side of the liquid crystal pixel LM63 at the upper left end of the matrix liquid crystal display 61. A center instruction liquid crystal display 63c is provided. Further, on the left side of the matrix liquid crystal display section 61, the level indicated by the matrix liquid crystal display section 61 is the reception signal level (in the reception state) or the transmission signal level (in the transmission state) in the normal mode.
Is formed, and an "M" liquid crystal display 65 is formed immediately below the "S / RF" liquid crystal display 64, and the memory in the memory channel mode is formed immediately below the "M" liquid crystal display 65. A three-digit seven-segment liquid crystal display section 66 indicating a channel is formed. Further, a 5-digit 7-segment liquid crystal display 67 indicating the transmission / reception frequency f _R (the center transmission / reception frequency in the scan mode) is formed in the lower right part of the LCD 60.
7 has a decimal point below the second and third digits.

The VRAM 40 is connected to the MPU 30,
This is a video RAM that stores 28 pixel data to be displayed on the matrix liquid crystal display section 61. The output terminal of the VRAM 40 is connected to the matrix display section 61 of the LCD 60 via the LCD driver 50. Therefore, VRAM
When pixel data is stored in 40, LC
The liquid crystal is displayed on the matrix liquid crystal display section 61 in real time by the D driver 50. FIG. 4 is a front view showing the relationship between the liquid crystal pixels of the matrix liquid crystal display section 61 of the LCD of FIG. 3 and the addresses of the VRAM 40 that stores the pixel data. As shown in FIG. 4, 28 liquid crystal pixels LM0
"00"-"6" in 2-digit display for each of 0-LM63
The address “3” is assigned.

The register 41 is connected to the MPU 30.
A 2-bit register for storing 2-bit pixel data Dsm to be displayed on the liquid crystal display units 64 and 65;
The output terminal of the register 41 is connected to the liquid crystal display units 64 and 65 of the LCD 60 via the LCD driver 51. Therefore, when the pixel data Dsm is stored in the register 41, the LCD driver 51 displays the liquid crystal on the liquid crystal display units 64 and 65 according to the stored data. Here, pixel data D
The first bit of sm is data indicating whether to display the liquid crystal display unit 64, and the second bit of the pixel data Dsm is data indicating whether to display the liquid crystal display unit 65.

The register 42 is connected to the MPU 30.
A register for storing memory channel number data Dm to be displayed on the liquid crystal display section 66;
Are connected to the liquid crystal display 66 of the LCD 60 via the LCD driver 52. Therefore, when the pixel data Dm is stored in the register 42, the LCD
The liquid crystal is displayed on the liquid crystal display section 66 by the driver 52. The register 43 is connected to the MPU 30 to transmit and receive frequency data Df to be displayed on the liquid crystal display 67.
A register for storing the _CL, the output terminal of the register 43 is connected to the liquid crystal display unit 67 of the LCD60 through the LCD driver 52. Therefore, when the pixel data Df _CL is stored in the register 43, it is a liquid crystal display on the liquid crystal display unit 67 by the LCD driver 53 accordingly.

The register 44 is connected to the MPU 30.
A 2-bit register for storing 2-bit pixel data Dcm for displaying the center indicating liquid crystal display units 63a, 63b, 63c, and the output terminal of the register 44 is L
The liquid crystal display section 63 of the LCD 60 via the CD driver 54
a, 63b, 63c. Therefore, register 4
4, when the pixel data Dcm is stored, the LCD driver 54 responds accordingly to the liquid crystal display units 63a, 63b.
The liquid crystal is displayed on b and 63c. Here, the pixel data Dc
When m is "00", only the liquid crystal display section 63a indicating the center of the matrix liquid crystal display section 61 is displayed, and when the pixel data Dcm is "01", the matrix liquid crystal display section 61 is displayed.
Of the matrix liquid crystal display 61 only when the pixel data Dcm is "10".

Various flags stored in the RAM in the MPU 30 are as follows. (A) FS2: FS2 = 0 in the VFO mode,
In the memory channel mode, FS2 = 1. (B) FS3: FS3 = 0 in the normal mode, and FS3 = 1 in the search mode. (C) FS4: FS4 = 0 in the receivable mode, and FS4 = 1 in the non-receivable mode. (D) FS5: FS5 = 0 in the normal mode, and FS5 = 1 in the scan search mode. (E) FS5S: a flag indicating the start of the scan search, which is set to 1 when the scan search mode is started, and is reset to 0 in step S407 after all the matrix liquid crystal display units 61 are turned off in step S406. Is done. (F) FUP: Set to 1 when the rotary encoder 31 is rotated clockwise to automatically or manually scan the transmission / reception frequency upward, while automatically setting the transmission / reception frequency downward or manually. 0 when the rotary encoder 31 is rotated counterclockwise to perform scanning
Is reset to

FIG. 9 is a flowchart of a main routine executed by the CPU of the wireless transceiver in FIG.

As shown in FIG. 9, in step S1, an initialization process is first performed. That is, the L-level TRSW signal is output to enter the receiving state, and (433M
Hz-f _IF ) is set as the local oscillation frequency data Df _L. In addition, each flag FS2, FS3, FS
4, FS5, FS5S are reset to 0 and the flag F
When UP is set to 1, an L level ESQ signal is output, and "10" is set and stored in the pixel data Dsm. Next, after the key input process (see FIGS. 10 and 11) is executed in step S2, it is determined in step S3 whether the flag FS2 is 1. If FS2 = 1, the memory channel mode process is executed in step S4, and then the process returns to step S2. On the other hand, when FS2 = 0, step S5
After the VFO mode process (see FIG. 12) is executed in step, the process returns to step S2.

FIGS. 10 and 11 are flowcharts of a subroutine of the key input process (step S2) of FIG. b)
Flag FS3 from step S31 to step S34
And (c) Steps S61 to S6
Setting processing of the flag FS5 up to 5 and (d) Step S
Setting processing of the flag FS4 from step S40 to step S46 (excluding step S45); and (e) step S
45 frequency data setting processing and (f) step S5
Rotary encoder 31 from 1 to step S54
And (g) other key input processing in step S55.

As shown in FIG. 10, in step S21, it is determined whether or not the switch SW2 has been turned on. When the switch SW2 has not been turned on, the process proceeds to step S31. Is determined. Here, when the flag FS2 = 1, the flag FS2 is reset to 0 in step S23, and then the process proceeds to step S31, while the flag FS2 =
When it is 0, the flag FS2 is set to 1 in step S24, and then the process proceeds to step S31.

Next, in step S31, it is determined whether or not the switch SW3 has been turned on. When the switch has not been turned on, the process proceeds to step S61. On the other hand, when it has been turned on, it is determined in step S32 whether or not the flag FS3 is "1". Is done. Here, when the flag FS3 = 1, the flag FS3 is reset to 0 in step S33, and then the process proceeds to step S61. When the flag FS3 = 0, the process proceeds to step S61 after the flag FS3 is set to 1 in step S34.

Next, in step S61, it is determined whether or not the switch SW5 has been turned on. If the switch SW5 has not been turned on, the flow proceeds to step S40 in FIG. Is determined. Here, when the flag FS5 = 1, after the flag FS5 is reset to 0 in step S63, the process proceeds to step S40 in FIG. On the other hand, when the flag FS5 = 0 in step S62, step S6
After the flags FS5 and FS5S are both set to 1 in steps S4 and S65, the process proceeds to step S40 in FIG.

Next, at step S40, the flag F is set.
It is determined whether or not S3 is 1, and it is determined in step S46 whether or not the flag FS5 is 1. That is, these determinations are made only in the search mode or the scan search mode in order to validate the processing of steps S41 to S44. Therefore, FS3 = 1 or FS5 = 1
, The process proceeds to step S41, while FS3 = 0 and FS3
When 5 = 0, the process proceeds to step S45. Further, in step S41, it is determined whether or not the switch SW4 has been turned on. When the switch SW4 has not been turned on, the process proceeds to step S45.
It is determined whether or not S4 is 1. Here, the flag F
When S4 = 1, the flag FS4 is reset to 0 in step S43, and then the process proceeds to step S45. On the other hand, when the flag FS4 = 0, the flag FS4 is reset in step S44.
After 4 is set to 1, the process proceeds to step S45.

Next, in step S45, the set frequency data fset set by using the rotary encoder 31 or the numeric keypad 32 is transmitted / received frequency data Df _CL
It is set as, set frequency data (Df _CL -f _IF) as the local oscillation frequency data Df _L, the local oscillation frequency data Df _L center local oscillation frequency data Df _LO
Is set as

Next, in step S51, it is determined whether or not the rotary encoder 31 has been rotated clockwise. If the rotary encoder 31 has been rotated clockwise, both the flags FUP and FS5S are set to 1 in step S52, and the flow advances to step S53. . On the other hand, if NO in step S51, the process directly proceeds to step S53. Next, in step S53, it is determined whether or not the rotary encoder 31 is rotated counterclockwise. If the rotary encoder 31 is rotated counterclockwise, the flag FUP is reset to 0 in step S54, and the flag FS5S is set to 1 in step S5.
Go to 5. On the other hand, if NO in step S53, the process directly proceeds to step S55. Further, step S55
, Input processing for other keys such as setting of the standby time Tw seconds using the numeric keypad 32, setting using the step frequency selection key 33, and setting using the frequency change unit changeover switch 34 is executed.

FIG. 12 is a flowchart of a subroutine of the VFO mode process (step S5) of FIG.

As shown in FIG. 12, it is determined in step S11 whether or not the flag FS3 is 1, and in step S90, it is determined whether or not the flag FS5 is 1. When FS3 = 0 and FS5 = 0, the mode is not the search mode and the scan search mode is not performed, so the process proceeds to step S96. On the other hand, when FS3 = 1, the process is in the search mode and the process proceeds to step S91, and when FS5 = 1. Since the mode is the scan search mode, step S9
Proceed to 4. In step S96, the pixel data Dsm
"10" is stored in the LCD 60 and "S / RF" is stored in the LCD 60.
A liquid crystal pixel of the liquid crystal display section 64 is displayed, and pixel data Dc is displayed.
m is set to “00”, and the liquid crystal pixels of the center instruction liquid crystal display 63 a are displayed on the LCD 60 on the LCD 60.
After executing the normal processing (see FIG. 13) at 13, the process returns.

In step S91, the pixel data D
The data “00” is stored in the sm and the liquid crystal display units 64 and 65 are stored.
Is stored in the pixel data Dcm, and "00" is stored in the pixel data Dcm, and the liquid crystal pixels of the center instruction liquid crystal display section 63a are displayed on the LCD 60, and the process proceeds to step S92. Next, in step S92, it is determined whether or not the flag FS4 is 1. When FS4 = 0, the search receivable process (see FIGS. 14 to 16) is executed in step S14, and then the process proceeds to step S93. . On the other hand, when FS4 = 1, the process proceeds to step S93 after performing the search reception disabled process in step S15. Step S93
In, the display change process (see FIG. 17) which is the process of the manual scan search is executed, and the process returns.

In step S94, the pixel data D
The data “00” is stored in the sm and the liquid crystal display units 64 and 65 are stored.
, And the process proceeds to step S95. Next, in step S95, it is determined whether or not the flag FS4 is "1". When FS4 = 0, scan search receivable processing (see FIGS. 14 to 16) is executed in step S17, and the process returns. On the other hand, FS4 = 1
In step S16, the process returns to step S16 after performing the scan search reception disabled process.

FIG. 13 is a flowchart of a subroutine of the normal processing (step S13) of FIG. FIG.
As shown in FIG. 3, first, in step S101, PT
It is determined whether the T switch SW1 is turned on,
If the switch is on, the process proceeds to step S102 to output an H level TRSW signal and transmit / receive switch 10
Is switched to the contact b side to set the transmission state, and then the process returns. On the other hand, when PTT switch SW1 is not turned on (NO in step S101), step S1
03, an L level TRSW signal is output, and the transmission / reception changeover switch 10 is switched to the contact a side to enter a reception state.
The received signal level data SLD output from the CPU is detected and captured, and in step S105, the data SLD is
After converting the data to the level 0, the converted data is stored in the address 0 of the VRAM 40 in step S106.
0, 01, 10, 11,..., 60, 61 and updated, and the 14 liquid crystal pixels LM00, LM01, L of the lowermost two rows of the matrix display unit 61 of the LCD 60 are updated.
M10, LM11, LM20, LM21, LM30, L
M31, LM40, LM41, LM50, LM51, L
Using M60 and LM61, the left end is set to the 0/7 level, two lines are simultaneously displayed, the signal level is displayed in the horizontal direction, and the routine returns.

For example, when the signal level is 4/7, as shown in FIG. 6, the liquid crystal pixels LM00, LM01, LM1
0, LM11, LM20, LM21, LM30, LM3
1 is displayed and when the signal level is 7/7, the liquid crystal pixels LM00, LM01, LM10, L of all two rows are displayed.
M11, LM20, LM21, LM30, LM31, L
M40, LM41, LM50, LM51, LM60, L
When M61 is displayed and the signal level is 1/7, the liquid crystal pixels LM00 and LM01 are displayed.

Although not described in detail, in the normal processing and other processing, the output level of the power amplifier 25 is detected in the transmission state, and the same as in the reception state.
Fourteen liquid crystal pixels LM00, LM01, LM10, and LM00 for the lowermost two rows of the matrix display unit 61 of the LCD 60 are shown.
LM11, LM20, LM21, LM30, LM31,
LM40, LM41, LM50, LM51, LM60,
Using the LM61, the left end is set to 0 level and two lines are simultaneously displayed, and the transmission signal level is displayed in the horizontal direction.

FIGS. 14 to 16 are flowcharts of the subroutine of the search receivable processing of FIG.

As shown in FIG. 14, first, in step S2
In step S202, it is determined whether the PTT switch SW1 is turned on.
Then, an H level TRSW signal is output, the transmission / reception changeover switch 10 is switched to the contact b side to set the transmission state, and then the process returns. On the other hand, when the PTT switch SW1 is not turned on (N in step S201)
O) In step S203, an L level TRSW signal is output to switch the transmission / reception changeover switch 10 to the contact a side to set the reception state, and then an H level ESQ signal is output in step S204 to output the squelch switch 1
1 is turned off, and the output of the low frequency signal to the speaker 13 is stopped.

Next, in step S211, the frequency data (Df _LO -3Δf) is converted to the local oscillation frequency data Df.
_L is set, and the received signal level data SLD output from the A / D converter 20 is detected and taken in at step S212, and the data SL is inputted at step S213.
After converting D into 4-level data, step S214
Store and update the converted data in the address 00-03 of the VRAM 40 so that the four liquid crystal pixels LM00 for one column of the matrix display unit 61 of the LCD 60 are updated.
Using LM03, the signal level is displayed in the vertical direction with the lower end at 0/4 level as shown in FIG. 5, for example. Here, for example, when the signal level is 4/4, all the four liquid crystal pixels LM00 to LM03 are displayed on the liquid crystal, and when the signal level is 2/4, the two liquid crystal pixels LM00 to LM0 are displayed.
1 is displayed on a liquid crystal display.

Next, in step S221, the frequency data (Df _LO -2Δf) is replaced with the local oscillation frequency data Df
_L , and detects and captures the received signal level data SLD output from the A / D converter 20 in step S222, and sets the data SL in step S223.
After converting D into 4-level data, step S224
Store and update the converted data in the address 10-13 of the VRAM 40 to update the four liquid crystal pixels LM10 for one column of the matrix display unit 61 of the LCD 60.
Using LM13, the signal level is displayed in the vertical direction with the lower end at 0/4 level.

Next, in step S231, the frequency data (Df _LO -Δf) is converted to the local oscillation frequency data Df _L
The received signal level data SLD output from the A / D converter 20 is detected and captured in step S232, and the data SLD is detected in step S233.
Is converted into four-level data, and the converted data is stored and updated at addresses 20-23 of the VRAM 40 in step S234, and the four liquid crystal pixels LM20 for one column of the matrix display unit 61 of the LCD 60 are updated. −
Using LM23, the signal level is displayed in the vertical direction with the lower end at 0/4 level, and the process proceeds to step S240 in FIG.

As shown in FIG. 15, in step S240, the L level ESQ signal is output, the squelch switch 11 is turned off, and the low frequency signal of the modulated wave of the received signal can be received using the speaker 13. In addition, the timer time (Twp) of the timer (not shown) in the MPU 30 for the standby process is reset to 0 seconds, and the timer starts. Next, after setting the central local oscillation frequency data Df _LO to the local oscillation frequency data Df _L in step S241, the process proceeds to step S242. In step S242, the received signal level data SLD output from the A / D converter 20 is detected and taken in, and in step S24
After the data SLD is converted into 4-level data in step S3, the converted data is stored in the addresses 30-33 of the VRAM 40 and updated in step S244, and the converted data is stored in the central portion of the matrix display section 61 of the LCD 60.
Using the four liquid crystal pixels LM30 to LM33 for the columns, the signal level is displayed in the vertical direction with the lower end at 0/4 level, and it is determined in step S245 whether the SD signal is at the H level. When the SD signal is at the H level, that is, when there is no reception signal at the reception frequency,
The process proceeds to step S250 in FIG. 16 without executing the waiting time determination process in step S246. On the other hand, when the SD signal is at the L level in step S245, that is, when there is a reception signal at the reception frequency, the standby time for the standby process is determined in step S246. That is, it is determined whether or not the clock time Twp of the clock timer has exceeded the preset standby time Tw. If not, the process returns to the process from step S242 to execute the level detection display process of the reception frequency while executing the standby process. On the other hand, if the time has elapsed, the process proceeds to step S250 in FIG. Step S above
The signal level displayed at 244 indicates the signal level of the signal currently being received. Steps S246 through S242 are followed by step S242.
In the loop processing returning to 246, while the signal level of the received signal is detected and displayed in real time at a predetermined cycle and the squelch switch 11 is on, the set transmission / reception frequency f _R = fset = Df _CL
And the low frequency signal of the modulated wave can be heard by the speaker 13. The present invention is not limited to this, and the determination of the standby time may not be performed in step S246, and the standby may be performed for the standby time Tw seconds, for example. In this case, the currently received signal level does not change in real time.

As shown in FIG. 16, in step S250, the H level ESQ signal is output to turn off the squelch switch 11, and the output of the low frequency signal to the speaker 13 is stopped. Next, in step S251, the frequency data (Df _LO + Δf) is converted to the local oscillation frequency data Df _L.
The received signal level data SLD output from the A / D converter 20 is detected and captured in step S252, and the data SLD is detected in step S253.
Is converted into four-level data, and in step S254, the converted data is stored in addresses 40-43 of the VRAM 40 and updated, and the four liquid crystal pixels LM40 for one column of the matrix display unit 61 of the LCD 60 are updated. −
The signal level is displayed in the vertical direction by setting the lower end to 0/4 level using the LM 43.

Next, in step S261, the frequency data (Df _LO + 2Δf) is replaced with the local oscillation frequency data Df
_L , and detects and takes in the received signal level data SLD output from the A / D converter 20 in a step S262, and outputs the data SL in a step S263.
After converting D into 4-level data, step S264
Store the converted data in addresses 50-53 of the VRAM 40 and update the converted data to obtain four liquid crystal pixels LM50 for one column of the matrix display 61 of the LCD 60.
Using LM53, the signal level is displayed in the vertical direction with the lower end at 0/4 level.

Next, in step S271, the frequency data (Df _LO + 3Δf) is replaced with the local oscillation frequency data Df
_L is set, and the received signal level data SLD output from the A / D converter 20 is detected and taken in at step S272, and the data SL is inputted at step S273.
After converting D into 4-level data, step S274
Store and update the converted data in the addresses 60-63 of the VRAM 40 to update the four liquid crystal pixels LM60 for one column of the matrix display section 61 of the LCD 60.
Using LM63, the signal level is displayed in the vertical direction with the lower end at 0/4 level.

The search reception disable processing (step S15) of FIG. 12 is shown in FIGS. 14 to 16 except that the ESQ signal of the H level instead of the L level is output in step S240 of FIG. This is the same as the search receivable processing (step S14). Thus, in the search mode and the non-receivable mode, signal levels of a plurality of frequencies are displayed as in the search receivable process, but the low frequency signal of the received signal cannot be heard using the speaker 13. It is composed of

FIG. 17 is a flowchart of a subroutine of the display change process (step S93) of FIG. 12 for executing the manual scan search.

In step S97, the direction of change in the rotation of the rotary encoder 31 is determined.
Is executed and then returns. If it is counterclockwise in step S97, the process returns after the downward display change process (see FIG. 19) is executed in step S99. Further, if there is no change in rotation in step S97, the process returns as it is.

FIG. 18 is a flowchart of a subroutine (step S98) of the upward display change process in FIG.

[0067] First, after the rotational frequency of the rotary encoder 31 is set to the data CNT in step S601, the data obtained by adding the step frequency Δf centered local oscillation frequency data Df _LO as the center local oscillation frequency data Df _LO at step S602 The data obtained by adding the step frequency Δf to the transmission / reception frequency data Df _CL in step S603 is
update as f _CL. Then, in step S604, the updated transmission / reception frequency data Df _CL is
After the display on the seven-segment liquid crystal display section 67 of 0, an upward display data replacement process (see FIG. 20) is executed in step S605. In the upward display data replacement process, the matrix display unit 6 of the LCD 60
1 so that the display position of the signal level of the received signal of a plurality of frequencies in V.1 is shifted leftward by one step.
The pixel data in the RAM 40 is replaced.

Next, in step S606, the data (Df _LO + 3Δf) is stored and updated in the local oscillation frequency data Df _L and set. Further, in step S607, the received signal level data SLD output from the A / D converter 20 is detected and taken in, and step S608 is performed.
After converting the data SLD into 4-level data at step S609, the converted data is stored in the addresses 60-63 of the VRAM 40 and updated at step S609, and the converted data is stored in the rightmost column of the matrix display unit 61 of the LCD 60. Using the liquid crystal pixels LM60 to LM63, the signal level is displayed in the vertical direction with the lower end at 0/4 level, whereby the rightmost signal level whose frequency no longer corresponds due to the data replacement in step S605 is detected. it's shown. Then, after updating the data CNT by decrementing it by 1 in step S610, it is determined in step S611 whether or not the data CNT is 0. When CNT = 0, the rotary encoder 31 is rotated and the designated shift The process returns assuming that the display position of the matrix liquid crystal display 61 has been shifted by the number of steps to be performed. On the other hand, if CNT ≠ 0 in step S611, the process returns to step S602 to repeat the processing.

By the above processing, the display position of the signal level of the received signal of a plurality of frequencies displayed on the matrix liquid crystal display section 61 of the LCD 60 is changed to the rotary encoder 3.
1 can be used to shift the frequency upward by the number of steps set manually. For example, as shown in FIG. 26, when the transmission / reception frequency is f11 (time t1), when the rotary encoder 31 is rotated clockwise by three steps, it changes sequentially from t1 through t2 and t3, and the time t4 is changed. State. In FIG. 26,
The frequency of each signal level in the matrix liquid crystal display 61 changed by the rotation operation of the rotary encoder 31 and the transmission / reception frequency data Df _CL displayed on the liquid crystal display 67 are shown, where f11 is the transmission / reception frequency at the start of the scan search. The higher the number assigned to “f”, the higher the frequency.

FIG. 19 is a flowchart of a subroutine (step S99) of the downward display change processing of FIG.

First, after the rotation frequency of the rotary encoder 31 is set in the data CNT in step S621, the data obtained by subtracting the step frequency Δf from the central local oscillation frequency data Df _LO in step S622 is used as the central local oscillation frequency data Df _LO. updated, and updates the data obtained by subtracting the step frequency Δf from the transmission and reception frequency data Df _CL as reception frequency data Df _CL at step S623. Then, in step S624, the updated transmission / reception frequency data Df _CL is
After the display on the seven-segment liquid crystal display section 67 of D60, a downward display data replacement process (see FIG. 21) is executed in step S625. In the downward display data replacement process, the pixel data in the VRAM 40 is replaced so that the signal level display positions of the reception signals of a plurality of frequencies on the matrix display unit 61 of the LCD 60 are shifted rightward by one step.

Then, in step S626, data (Df _LO -3Δf) is stored and updated in local oscillation frequency data Df _L and set. Further, in step S627, the received signal level data SLD output from the A / D converter 20 is detected and taken in. In step S628, the data SLD is converted into 4-level data.
In step S629, the converted data is stored in VR
Store and update at address 00-03 of AM 40,
Using four liquid crystal pixels LM00 to LM03 for one column at the left end of the matrix display unit 61 of the LCD 60, the lower end is set to 0.
The signal level is displayed in the vertical direction as the / 4 level, whereby the leftmost signal level whose frequency no longer corresponds due to the data replacement in step S625 is detected and displayed. Then, after updating the data CNT by decrementing it by 1 in step S630, it is determined in step S631 whether the data CNT is 0. If CNT = 0, the rotary encoder 31 is updated.
Is rotated and the display position of the matrix liquid crystal display 61 is shifted by the specified number of steps to be shifted. On the other hand, in step S631, C
If NT ≠ 0, the process returns to step S622 to repeat the processing.

With the above processing, the display position of the signal level of the received signal of a plurality of frequencies displayed on the matrix liquid crystal display section 61 of the LCD 60 is changed to the rotary encoder 3.
By using 1, the frequency can be shifted downward by the number of steps set manually. For example, as shown in FIG. 26, when the transmission / reception frequency is f14 (time t4), and the rotary encoder 31 is rotated counterclockwise by three steps, it changes sequentially from t4 through t3 and t2, and the time t1 changes. State.

FIG. 20 is a flowchart of a subroutine of the upward display data replacement processing (steps S605 and S501) in FIGS. 18 and 23.

First, in step S321, the VRAM
The pixel data stored at the address 10-13 of the forty is stored and updated at the address 00-03, and the corresponding signal level is displayed in the vertical direction on the liquid crystal pixels LM00-03 of the matrix liquid crystal display 61 of the LCD 60. . Next, in step S322, the pixel data stored in the address 20-23 of the VRAM 40 is stored and updated in the address 10-13, and the corresponding signal level is vertically set in the matrix liquid crystal display section 61 of the LCD 60.
Is displayed on the liquid crystal pixels LM10-13. Further, in steps S323 to S326, the same processing is repeated to store the addresses 30-33, 40-4 of the VRAM 40.
3, 50-53 and 60-63, respectively, at addresses 20-23, 30-33,
40-43, 50-53, and update the corresponding signal levels in the vertical direction in the liquid crystal pixels LM20-23, LM3 of the matrix liquid crystal display 61 of the LCD 60, respectively.
0-33, LM40-43, LM50-53 and return. With the above processing, the display position of the signal level of the reception signal of a plurality of frequencies displayed on the matrix liquid crystal display section 61 of the LCD 60 is shifted leftward by one step.

FIG. 21 is a flowchart of a subroutine of the downward display data replacement processing (steps S625 and S511) in FIGS. 19 and 24.

First, in step S331, the VRAM
The pixel data stored in the addresses 50-53 of the forty is stored and updated in the addresses 60-63, and the corresponding signal levels are displayed in the vertical direction on the liquid crystal pixels LM60-63 of the matrix liquid crystal display 61 of the LCD 60. . Then, in step S332, the pixel data stored in the addresses 40-43 of the VRAM 40 is stored and updated in the addresses 50-53, and the corresponding signal level is vertically set in the matrix liquid crystal display section 61 of the LCD 60.
Is displayed on the liquid crystal pixels LM50-53. Further, in steps S333 to S336, the same processing is repeated to store the addresses 30-33, 20-2 of the VRAM 40.
3, 10-13, and 00-03, respectively, at the addresses 40-43, 30-33, and
20-23 and 10-13, and update the corresponding signal levels in the vertical direction in the liquid crystal pixels LM40-43, LM3
0-33, LM20-23, LM10-13 and return. By the above processing, the display position of the signal level of the reception signal of a plurality of frequencies displayed on the matrix liquid crystal display 61 of the LCD 60 is shifted rightward by one step.

FIG. 22 is a flowchart of a subroutine of the scan search receivable process of FIG.

As shown in FIG. 22, first, in step S4
In step 01, it is determined whether or not the PTT switch SW1 is turned on.
Then, an H level TRSW signal is output, the transmission / reception changeover switch 10 is switched to the contact b side to set the transmission state, and then the process returns. On the other hand, when the PTT switch SW1 is not turned on (N in step S401)
O) In step S403, an L-level TRSW signal is output and the transmission / reception changeover switch 10 is switched to the contact a side to enter the reception state.
1 is turned off, and the low frequency signal is output to the speaker 13. Next, in step S405, the flag FS5S
FS5S = 1, the address 00 of the VRAM 40 is determined in step S406.
After clearing -63, all the liquid crystal pixels of the matrix liquid crystal display section 61 are turned off, the flag FS5S is reset to 0 in step S407, and the process proceeds to step S408. On the other hand, when FS5S = 0 in step S405, the process directly proceeds to step S408.

Next, at step S408, it is determined whether or not the flag FUP = 1, and when FUP = 1, "0" is added to the pixel data Dcm at step S409.
"1" is stored in the LCD 60 and the center indication liquid crystal display 6
The liquid crystal pixel 3b is displayed on the liquid crystal display, and in step S410, a scan search upward process (see FIG. 23) is executed, and the process returns. On the other hand, in step S408, FUP = 0
, The pixel data Dcm in step S411
Is stored in the LCD 60, and the liquid crystal pixels of the center instruction liquid crystal display section 63c are displayed on the LCD 60 by liquid crystal.
In step, a scan search downward process (see FIG. 24) is executed, and the process returns.

The scan search reception impossible processing (step S16) in FIG. 12 is performed in step S404 in FIG.
Is the same as the scan search receivable process (step S17) shown in FIG. Thus, when the scan search mode is set to the non-receivable mode, signal levels of a plurality of frequencies are displayed as in the scan search receivable process. It is configured so that it cannot be done.

FIG. 23 is a flowchart of a subroutine of the scan search upward process (step S410) of FIG.

First, after performing the upward display data replacement process (see FIG. 20) in step S501,
In step S502, an L-level ESQ signal is output, the squelch switch 11 is turned off, a low-frequency signal of the modulated wave of the received signal can be received using the speaker 13, and the MPU 30 in the MPU 30 performs standby processing. The clocking time Twp of the clocking timer is reset to 0 seconds to start the clocking. Next, in step S503, the transmission / reception frequency data Df _CL is set in the register 43 and displayed on the liquid crystal display 67. In step S504, the central local oscillation frequency data Df _LO is set to the local oscillation frequency data Df _L and the process proceeds to step S505. move on.

In step S505, received signal level data SLD output from A / D converter 20 is detected and taken in. In step S506, data SL is output.
After converting D into 4-level data, step S507
Store and update the converted data in the addresses 60-63 of the VRAM 40 to update the four liquid crystal pixels L for one column at the right end of the matrix display section 61 of the LCD 60.
Using M60-LM63, the signal level is displayed in the vertical direction with the lower end at 0/4 level, and it is determined in step S508 whether the SD signal is at the H level. S
When the D signal is at the H level, that is, when there is no signal at the reception frequency, the process proceeds to step S510 without executing the standby time determination process of step S509.
On the other hand, when the SD signal is at the L level in step S508, that is, when there is a signal at the reception frequency, a standby time for standby processing is determined in step S509. That is, the clock time T of the clock timer
It is determined whether or not wp has exceeded a preset standby time Tw. If not, step S505
And the level detection display process of the reception frequency is executed while executing the standby process. On the other hand, if it has elapsed, the process proceeds to step S510. Next, step S51
And sets the frequency data (Df _LO + Δf) centered local oscillation frequency data Df _LO at 0, the routine returns after setting the frequency data (Df _CL + Δf) as a transfer frequency data Df _CL.

The signal level displayed in step S507 in FIG. 23 indicates the signal level of the currently received signal. In the loop processing from step S505 to step S505 via step S509, the squelch switch 11 is turned on while detecting and displaying the signal level of the received signal in real time at a predetermined cycle. Therefore, the reception signal of the set transmission / reception frequency f _R = fset = Df _CL can be received, and the low frequency signal of the modulated wave can be heard by the speaker 13. The present invention is not limited to this, and the determination of the standby time may not be performed in step S509, and the standby may be performed for the standby time Tw seconds, for example. In this case, the currently received signal level does not change in real time.

FIG. 24 is a flowchart of a subroutine of the scan search downward process (step S412) in FIG.

First, after performing the downward display data replacement process (see FIG. 21) in step S511,
In step S512, an L-level ESQ signal is output, the squelch switch 11 is turned off, the speaker 13 is used to receive a low-frequency signal of the modulated wave of the received signal, and the MPU 30 in the MPU 30 for standby processing. The clocking time Twp of the clocking timer is reset to 0 seconds to start the clocking. Next, in step S513, the central local oscillation frequency data Df _LO is set to the local oscillation frequency data Df _L , and in step S514, the transmission / reception frequency data Df _L is set.
By setting _fCL in the register 43, it is displayed on the liquid crystal display 67, and the flow advances to step S515.

In step S515, received signal level data SLD output from A / D converter 20 is detected and taken in. In step S516, data SL is output.
After converting D into 4-level data, step S517
Store and update the converted data in the address 00-03 of the VRAM 40 to obtain four liquid crystal pixels L for one column at the left end of the matrix display unit 61 of the LCD 60.
Using M00-LM03, the signal level is displayed in the vertical direction with the lower end at 0/4 level, and it is determined in step S518 whether the SD signal is at the H level. S
When the D signal is at the H level, that is, when there is no signal at the reception frequency, the process proceeds to step S520 without performing the standby time determination process in step S519.
On the other hand, when the SD signal is at the L level in step S518, that is, when there is a signal at the reception frequency, the standby time for the standby process is determined in step S519. That is, the clock time T of the clock timer
It is determined whether or not wp has exceeded a preset standby time Tw. If not, step S515
And the level detection display process of the reception frequency is executed while executing the standby process. On the other hand, if the time has elapsed, the process proceeds to step S520. Next, step S52
And sets the frequency data (Df _LO -Δf) as the center local oscillation frequency data Df _LO at 0, the routine returns after setting the frequency data (Df _CL -.DELTA.f) as a transfer frequency data Df _CL.

The signal level displayed in step S517 of FIG. 24 indicates the signal level of the signal currently being received. In the loop processing from step S515 to step S515 via step S519, the squelch switch 11 is turned on while detecting and displaying the signal level of the received signal in real time at a predetermined cycle. Therefore, the reception signal of the set transmission / reception frequency f _R = fset = Df _CL can be received, and the low frequency signal of the modulated wave can be heard by the speaker 13. The present invention is not limited to this, and the determination of the standby time may not be performed in step S519, and the standby may be performed for the standby time Tw seconds, for example. In this case, the currently received signal level does not change in real time.

In the scan search receivable process described with reference to FIG. 22, the transmission / reception frequency is automatically changed upward or downward for each step frequency set using the step frequency selection key 33. Is repeated until the scan search mode is released,
Thus, by shifting the data of the signal levels of the reception signals of a plurality of frequencies in the VRAM 40, the display position of the signal levels of the reception signals of the plurality of frequencies is shifted upward or downward in response to the change in the transmission / reception frequency. Are sequentially shifted and displayed. Here, when the transmission / reception frequency is changed upward in the scan search mode, the display of the signal level of the transmission / reception frequency is performed by the matrix liquid crystal display 61 as indicated by the center instruction liquid crystal display 63b in FIG. Since the transmission / reception frequency is sequentially scanned upward after being shifted to the right end, the display position of the corresponding signal level is sequentially shifted leftward as shown in FIG. On the other hand, when changing downward, the display of the signal level of the transmission / reception frequency is shifted after being shifted to the left end of the matrix liquid crystal display 61 as indicated by the center instruction liquid crystal display 63c in FIG. Since the transmission and reception frequencies are sequentially scanned downward, the corresponding signal level display position is shown in FIG.
As shown in FIG. Note that FIG.
7 and FIG. 28 show the frequency of each signal level in the matrix liquid crystal display section 61 which changes with the passage of time t and the transmission / reception frequency data Df _CL displayed on the liquid crystal display section 67 as in FIG. , F11 are transmission / reception frequencies at the start of the scan search, and the larger the number assigned to “f”, the higher the frequency.

In step S406 of the scan search receivable process of FIG. 22, all the liquid crystal displays of the matrix liquid crystal display section 61 in the LCD 60 are turned off. However, the present invention is not limited to this. It may be configured so as not to be turned off. in this case,
29 and 30 corresponding to FIGS. 27 and 28, respectively.
As shown in the figure, at the time of an upward scan search, the lower three frequencies f8 = f11-3Δf, f9 = f11-2Δf, from the transmission / reception frequency f11 at the start of the scan search.
The data of the signal level of f10 = f11−Δf is VRAM
Since the remaining data is stored at 40, it is additionally displayed as compared with the above embodiment, and when performing a downward scan search, the upper three frequencies f12 = f11 + Δf and f13 = f11 + 2Δ from the transmission / reception frequency f11 at the start of the scan search.
f, f14 = f11 + 3Δf The signal level data is V
Since the remaining data is stored in the RAM 40, it is additionally displayed as compared with the above embodiment.

FIG. 25 shows signal level display processing for a plurality of frequencies when the VFO mode, the search mode, and the search receivable mode are set in the radio transceiver of FIG. 1, and the reception state is repeated when the SD signal is at the L level. 7 is a timing chart at the time of a search reception process (hereinafter, referred to as a search reception process) centered on FIG. As shown in FIG. 25, the search reception process includes the following process groups. If the mode is not switched using the switches SW1 to SW4, the process is periodically repeated.

(A) Steps S2 and S in the main routine
A process 500 of T0 seconds including the process of 3. (B) The set transmission / reception frequency f _R = fset = Df _CL including the processing of steps S211 to S234, which is lower than 3
T1 second processing 501 including detection and display processing of signal levels of two frequencies (hereinafter, referred to as lower three frequencies). here,
Lower third frequency, only the step frequency Δf which is preset different frequencies f _R -3Δf, frequency f _R -2Δ
f, frequency f _R −Δf. (C) T2 second processing 502 including detection and display processing of the signal level of the transmission / reception frequency f _R = fset = Df _CL including the processing of steps S240 to S245. (D) The processing for determining the waiting time of Tw seconds in step 246, and steps S246 to S242 (not shown in FIG. 25) until the waiting time Tw seconds elapse.
503 including a loop process returning to step S246 through In the process 503, as described above,
The signal level of the currently received transmission / reception frequency f _R = fset = Df _CL is periodically detected and displayed in real time at a predetermined cycle, and the operator can receive the modulated signal while watching the display of the signal level. The low frequency signal of the wave can be heard on the speaker 13. (E) The set transmission / reception frequency f _R = fset = Df _CL including the processing of steps S250 to S274
T3 second processing 504 including detection and display processing of signal levels of three frequencies (hereinafter, referred to as upper three frequencies). here,
The upper three frequencies are frequencies f _R + Δf, f _R + 2Δf, which differ from each other by a preset step frequency Δf,
The frequency is f _R + 3Δf.

In the search receiving process, the process 5
When 00 to 504 are repeated periodically, when the level detection display processing of one frequency is performed, the signal levels of the other six frequencies are stored and displayed in the VRAM 40 in the immediately preceding level detection display processing. Therefore, the signal levels of all seven frequencies including the upper three frequencies, the transmission / reception frequency f _R, and the lower three frequencies are displayed on the matrix display section 61 of the LCD 60, whereby the step frequency Δf Thus, the signal levels of a plurality of frequencies including a frequency band from the lowest frequency f _R −3Δf to the highest frequency f _R + 3Δf and having a reception bandwidth of 6Δf are displayed. Also, for example, processing 500
To 502 and processing 504 (T0 + T1 + T2 + T
3) By making the seconds as small as possible and making the waiting time Tw seconds sufficiently large, the time (T0 + T1 + T2 + T3) seconds between the processings 500 to 502 and the processing 504 (the squelch switch 11 is turned off in the processings 500 to 502 and the processing 504). And the speaker 13 does not output a low-frequency signal of the received signal from the speaker 13), the speaker 13 listens to the low-frequency signal of the modulated wave of the received signal of the transmission / reception frequency f _R in steps S240 to S246. be able to.

Here, since the signal levels of the seven frequencies are always stored in the VRAM 40, the low frequency signal of the modulated wave of the received signal of the desired transmission / reception frequency f _R is substantially used by using the speaker 13. While listening, the signal levels of a plurality of frequencies displayed on the matrix display unit 61 can be observed. Therefore, the signal level of the currently set and received transmission / reception frequency f _{R and} the signal level near the signal level f _R 6 are set.
Each signal level of one frequency can be easily observed.

Here, the standby time Tw may be variably set by the operator using the numeric keypad 32 according to the communication status, and Tw is preferably set to 10 to 30 seconds. According to the prototype experiment of the inventor, it has been confirmed that the level detection display processing for one frequency can be suppressed to 0.01 millisecond or less.

The memory channel mode processing (step S4) is the same as the VFO processing (step S4) except for the following processing.
This is executed in the same manner as 5). Here, it is assumed that a channel number preset using the rotary encoder 31 or the numeric keypad 32 is a natural number m, and the transmission / reception frequency at that time is fm. At this time, the set frequency fset is set to fm. (A) The “M” liquid crystal display section 65 is displayed on the LCD 60. (B) In step S211, the frequency data ｛Df _LO
−f (m−3)} is set as the local oscillation frequency data Df _L. (C) In step S221, the frequency data ｛Df _LO
−f (m−2)} is set as the local oscillation frequency data Df _L. (D) In step S231, the frequency data @Df _LO
−f (m−1)} is set as the local oscillation frequency data Df _L. (E) In step S251, the frequency data @Df _LO
−f (m + 1)} is set as the local oscillation frequency data Df _L. (F) In step S261, the frequency data ｛Df _LO
−f (m + 2)} is set as the local oscillation frequency data Df _L. (G) In step S271, the frequency data @Df _LO
−f (m + 3)} is set as the local oscillation frequency data Df _L.

When the radio transceiver sets the memory channel mode, the search mode, and the search receivable mode and repeats the reception state, when the level detection display processing of one frequency is performed, the other six frequencies are detected. Is stored and displayed in the VRAM 40 in the immediately preceding level detection and display process.
The channel numbers (m
The signal levels for the frequencies of the seven memory channels from -3) to (m + 3) are displayed, whereby the seven signal levels are displayed. Therefore, the signal levels of the currently set and received memory channel and the six memory channels near the number of the memory channel can be easily observed even if the frequencies are far apart from each other. In the above operation mode, when the seven channel numbers are arranged in ascending order, each signal level is displayed. The displayed channel number is the signal of the received signal corresponding to the seven channel numbers selected by the operator in advance. The level may be displayed.

As described above, the search mode and the receivable mode are selected in the VFO mode and the memory channel mode, so that a single-system receiving circuit for receiving only a high-frequency signal of one receiving frequency is used. Te, the process of detecting and storing the signal level of the plurality of frequencies, the output of the FM demodulator 8 is performed by time division and outputting to the speaker 13, substantially, the reception of a desired reception frequency f _R The low frequency signal of the modulated wave of the signal
The user can easily and substantially simultaneously observe the signal levels of the seven frequencies displayed on the matrix display unit 61 while listening using the “3”. For example, in the VFO mode, the spectrum can be displayed in a pseudo manner by reducing the step frequency. Note that the above-described time division processing may be performed simultaneously. In this case, when receiving a reception signal of six frequencies other than the reception signal of the desired transmission / reception frequency f _R and the signal level is equal to or higher than the squelch level Can be accompanied by a humming sound.

In the present embodiment, unlike the conventional example shown in FIG. 2, there are no two receiving circuits of an original signal receiving circuit and a receiving circuit for displaying a spectrum, and only the former one receiving circuit is provided. As a result, compared with the conventional example of FIG. 2 and the case where a spectrum analyzer is separately provided, a wireless transceiver with a signal level display function of a plurality of frequencies, which has a very simple circuit configuration and a low manufacturing cost, is realized. be able to.

In the conventional example shown in FIG. 2, the bandwidth for measuring the received signal in the spectrum display is as follows.
It is determined substantially by the pass band width of the band pass filter in the scope IF amplifier 112, and if it is desired to set the same as the received signal level indicated by the signal level meter 109, the bandwidth of the band pass filter in the IF amplifier 104 Needs to be changed to be the same as that of the scope IF amplifier 112. On the other hand, in the present embodiment, since the processing is performed by the same receiving circuit, the setting change is not required, and a plurality of frequencies (VFOs) located near the frequency of the currently received reception signal are used. The signal level can be easily grasped by looking at the matrix display section 61 of the LCD 60 under the same receiving conditions as the received signal being received. This makes it possible to easily find a free channel or a used channel in a nearby frequency. The former is useful when most channels are busy, especially in urban areas. On the other hand, it is important to know which channels are used especially in non-urban areas. It is effective when there are few.

Further, in the receiving state, the number of pixels in the horizontal direction is set to be larger than the number of pixels in the vertical direction in the search mode, as described above, so that the matrix display section 61 of the LCD 60 changes in the vertical direction. While the signal levels of the high frequency signals of the seven frequencies are displayed, the signal level of the high frequency signal during reception that changes in the horizontal direction using the pixels in the lowermost two rows and seven columns of the matrix display unit 61 in the normal mode. Can be displayed with a larger number of steps than the signal level display of a plurality of frequencies, that is, with a higher signal level.

In the above embodiments, a wireless transceiver has been described. However, the present invention is not limited to this, and can be applied to a wireless receiver, a wired receiver, or a wired transceiver that receives high-frequency signals. Further, in the above embodiment, an example of the FM transceiver is described. However, the present invention is not limited to this, and can be applied to a transceiver or a receiver of any modulation scheme such as AM, SSB, FSK, and the like. . In the above embodiments, the receiver having one system of receiving circuit is described. However, the present invention is not limited to this, and may be applied to a receiver having a plurality of systems of receiving circuits.

In the above embodiment, the VRAM 40, which is a memory for storing display data on the LCD 60, and the registers 41, 42, 43, 44 are provided separately from the MPU 30, but the present invention is not limited to this. A one-chip microprocessor provided may be used.

In the above embodiment, the transmission frequency and the reception frequency are set to be the same at the set frequency fset. May be.

In the above embodiment, the signal level is displayed in the horizontal direction using the matrix display section 61 of the LCD 60 in the normal mode, and the signal level is displayed in the vertical direction using the matrix display section 61 in the search mode. But
These display directions are not limited to this, and for example, these display directions may be reversed.

In the memory channel mode processing (step S4) in the above embodiment, the signal levels of the received signals of a plurality of channels are displayed side by side in ascending order of the channel numbers. However, the present invention is not limited to this. They may be displayed side by side in descending order.

In the above embodiment, in the normal mode, the signal level of the received signal is changed so as to change in the horizontal direction.
Although it is displayed on the matrix display unit 61 of D60, the present invention is not limited to this, and it may be displayed so as to change in the vertical direction. Also, in the search mode, the LCD is changed so that each signal level of the spectrum changes in the vertical direction.
Although the image is displayed on the matrix display unit 60, the present invention is not limited to this, and the image may be displayed so as to change in the horizontal direction. Further, the display direction of the signal level may be changed between the display of the signal level and the display of the spectrum, or the display may be performed in the same direction without changing the display direction.

Although the setting process of the set frequency fset is performed in step S45 in FIG.
If et does not change, the process of step S45 may not be performed.

In FIG. 15, in step S245, it is determined whether or not to execute a standby process for a predetermined time Tw (see step S246) according to the presence or absence of a received signal. The determination may be made accordingly, or the process of step S245 may be deleted. In this case, regardless of the signal level of the SD signal, that is, regardless of the presence or absence of the received signal, step S246
Is executed.

In FIG. 15, YE is determined in step S245.
In step S250, the process directly proceeds to step S250. However, the present invention is not limited to this, and a standby process of waiting for a preset standby time Twa may be executed, and then the process may proceed to step S250.

By changing the standby time Tw and / or the standby time Twa, a process of detecting and storing signal levels of a plurality of frequencies by using one system of receiving circuit and an output of the FM demodulator 8 are performed. It is possible to change the ratio of the operation time of each processing when the processing to be output to the speaker 13 is performed in a time-division manner.

In the above embodiment, the local oscillator 4 is constituted by using a PLL circuit. However, in order to shorten the operation time for changing and setting the local oscillation frequency, the ROM for storing the signal waveform level in advance is used. May be used to generate a local oscillation signal having a predetermined local oscillation frequency.

In the above embodiment, when the SD signal is at the L level, the signal level is detected and stored for one reception frequency in steps S240 to S246, and the demodulated low frequency signal is output to the speaker 13. However, the present invention is not limited to this, and the signal levels of a plurality of reception frequencies may be sequentially detected and stored, and the demodulated low-frequency signals may be sequentially output to the speaker 13.

In the above embodiment, the OR gate OR1 is provided outside the MPU 30, but it may be realized by software for the internal processing of the MPU 30.

[0116]

As described above in detail, according to the present invention, in a display device of a receiver for receiving a high-frequency signal at a predetermined reception frequency, the reception frequency is selectively switched in an arbitrary set switching order. Detection and storage means for detecting and storing the signal strengths of the plurality of received N reception frequencies, which are a part of all of the plurality of reception frequencies that can be received by the receiver; A plurality of N display units respectively corresponding to the N reception frequencies are juxtaposed, and the stored signal strengths of the plurality of N reception frequencies are respectively displayed on the plurality of N display units in accordance with the switching order. Display means for displaying, and shifting the signal intensities of the plurality of N reception frequencies stored in the detection storage means one by one in response to the change of the reception frequency. After shifting the display position of the signal strength of the plurality of N reception frequencies displayed on the display means, when the signal strength of the reception frequency is shifted, data of one signal strength is lost in the detection storage means, 1
Detecting and storing the signal strength of the new reception frequency at which the data of the two signal strengths becomes vacant, the signal strength of the new reception frequency is displayed on one display unit located at one end of the plurality of N display units. And control means for controlling the display to be performed. Therefore, in the plurality of display units of the display means, the signal strengths of the plurality of reception frequencies, which are a part of all the plurality of reception frequencies that can be received by the receiver, are respectively corresponding to the switching order. In addition to being able to display, the display positions of the signal intensities of the plurality of frequencies can be shifted and changed in response to the change of the reception frequency by using a detection storage unit including a relatively small-capacity memory. This makes it possible to easily and substantially simultaneously observe the signal intensities at a plurality of frequencies. Further, there is an advantage that a vacant channel or a used channel in a nearby frequency can be easily found. Further, when the signal strength of the reception frequency is shifted, the data of one signal strength is lost in the detection storage means, but the signal strength of a new reception frequency at which the data of one signal strength becomes empty is detected and stored. By doing so, it is possible to display the signal strength of the new reception frequency on one display unit located at one end of the plurality of N display units.

[Brief description of the drawings]

FIG. 1 is a block diagram of a wireless transceiver with a signal level display function of a plurality of frequencies according to an embodiment of the present invention.

FIG. 2 is a block diagram of a conventional radio receiver with a spectrum display function.

FIG. 3 is a front view of the LCD of FIG. 1;

4 is a front view showing a relationship between liquid crystal pixels of a matrix display section of the LCD of FIG. 3 and addresses of a VRAM for storing pixel data.

FIG. 5 is a front view of the LCD showing an example when displaying signal levels of a plurality of frequencies in the VFO mode and the search mode in the wireless transceiver of FIG. 1;

FIG. 6 is a front view of the LCD showing an example when the reception signal level is displayed in the VFO mode and the normal mode in the wireless transceiver of FIG. 1;

FIG. 7 is a front view of the LCD showing an example of a case where the signal levels of a plurality of frequencies are displayed in the VFO mode and the scan search mode when the transmission / reception frequency is scanned in the higher direction in the wireless transceiver of FIG. 1; is there.

FIG. 8 is a front view of the LCD showing an example of a case where the signal levels of a plurality of frequencies are displayed in the VFO mode and the scan search mode when the transmission / reception frequency is scanned in the lower direction in the wireless transceiver of FIG. 1; is there.

FIG. 9 is a flowchart of a main routine executed by the CPU of the wireless transceiver in FIG. 1;

10 is a first subroutine of the key input process of FIG. 9;
It is a flowchart of the part.

11 is a second subroutine of the key input process of FIG. 9;
It is a flowchart of the part.

FIG. 12 is a flowchart of a subroutine of VFO mode processing of FIG. 9;

FIG. 13 is a flowchart of a subroutine of normal processing in FIG.

FIG. 14 is a first part of a flowchart of a subroutine of a search receivable process of FIG. 12;

FIG. 15 is a second part of the flowchart of the subroutine of the search receivable process of FIG. 12;

FIG. 16 is a third part of the flowchart of the subroutine of the search receivable process of FIG. 12;

17 is a flowchart of a subroutine of a display change process of FIG.

18 is a flowchart of a subroutine of an upward display change process in FIG.

FIG. 19 is a flowchart of a subroutine of a downward display change process in FIG. 17;

FIG. 20 is a flowchart of a subroutine of an upward display data replacement process in FIGS. 18 and 23.

FIG. 21 is a flowchart of a subroutine of a downward display data replacement process in FIGS. 19 and 24.

FIG. 22 is a flowchart of a subroutine of scan search receivable processing of FIG.

FIG. 23 is a flowchart of a subroutine of a scan search upward process in FIG. 22;

FIG. 24 is a flowchart of a subroutine of scan search downward processing in FIG. 22;

FIG. 25 is a timing chart mainly showing signal level display processing of a plurality of frequencies in the wireless transceiver of FIG. 1;

26 shows the frequencies of seven signal levels displayed on the matrix display unit 61 of the liquid crystal display unit and the transmission and reception frequencies displayed on the 7-segment liquid crystal display unit 67 when the transmission and reception frequencies are scanned by the manual scan search. FIG.

FIG. 27 shows the frequency of seven signal levels displayed on the matrix display unit 61 of the liquid crystal display unit when the transmission / reception frequency is scanned by the automatic scan search for scanning the transmission / reception frequency in the higher direction, and the 7-segment liquid crystal display unit 67.
FIG. 3 is a diagram showing transmission and reception frequencies displayed in FIG.

FIG. 28 shows the frequency of seven signal levels displayed on the matrix display unit 61 of the liquid crystal display unit when the transmission / reception frequency is scanned by the automatic scan search for scanning the transmission / reception frequency in the lower direction, and the 7-segment liquid crystal display unit 67.
FIG. 3 is a diagram showing transmission and reception frequencies displayed in FIG.

FIG. 29 shows the frequency of seven signal levels displayed on the matrix display section 61 of the liquid crystal display section when the transmission / reception frequency is scanned in the modification of the automatic scan search for scanning the transmission / reception frequency in the higher direction, and the 7-segment liquid crystal display. FIG. 7 is a diagram illustrating transmission and reception frequencies displayed on a unit 67.

FIG. 30 shows the frequency of seven signal levels displayed on the matrix display unit 61 of the liquid crystal display unit when the transmission / reception frequency is scanned in the modification of the automatic scan search for scanning the transmission / reception frequency in the lower direction, and the 7-segment liquid crystal display. FIG. 7 is a diagram illustrating transmission and reception frequencies displayed on a unit 67.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Antenna, 2 ... RF amplifier, 3, 24 ... Mixer, 4
... local oscillator, 5 ... IF band-pass filter, 6 ... IF amplifier, 8 ... FM demodulator, 9 ... low-pass filter, 10 ...
Transmission / reception changeover switch, 11 ... Squelch switch, 1
2: AF amplifier, 13: speaker, 14: high-pass filter, 15: attenuator for squelch level adjustment, 16: noise amplifier, 17: detection circuit, 18: waveform shaping circuit, 19 ...
Detection circuit, 20 A / D converter, 30 MPU, 31
Rotary encoder (RE), 32 ... numeric keypad, 33
... Step frequency selection key, 34... Frequency change unit switch, 40... VRAM, 41, 42, 43, 44.
Register, 50, 51, 52, 53, 54 ... LCD driver, 60 ... LCD, 61 ... matrix liquid crystal display,
63a, 63b, 63c: center instruction liquid crystal display, 6
7 ... 7 segment liquid crystal display, OR1 ... OR gate, S
W1: PTT switch, SW2: VFO mode / memory channel mode switch, SW3: Normal mode / search mode switch, SW4: Receivable mode / non-receivable mode switch, SW5 ...
Normal mode / scan search mode switch.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Kazuyuki Nakayama, 1-11-1 Mishimae, Takatsuki-shi, Osaka Aruinco Co., Ltd. (72) Satoshi Tagi 1-1-1, Mishimae, Takatsuki-shi, Osaka No. Alinco Co., Ltd. (56) References Japanese Utility Model Showa 58-155141 (JP, U) Japanese Utility Model Showa 58-169731 (JP, U)

Claims (2)

(57) [Claims] 1. A display device of a receiver for receiving a high-frequency signal at a predetermined reception frequency, wherein the reception frequency is selectively switched in an arbitrarily set switching order, and all the reception frequencies can be received by the receiver. Detection and storage means for detecting and storing the signal strengths of the plurality of received N reception frequencies, which are a part of the plurality of reception frequencies, and a plurality of N corresponding to the plurality of N reception frequencies, respectively. Display means for displaying the signal strengths of the plurality of stored N reception frequencies on the plurality of N display sections in accordance with the switching order, respectively. Correspondingly, the signal intensities of the plurality of N reception frequencies stored in the detection storage means are respectively set to 1
After shifting the display positions of the signal intensities of a plurality of N reception frequencies displayed on the display means by shifting each signal, one signal is stored in the detection storage means when the signal intensities of the reception frequencies are shifted. By detecting and storing the signal strength of the new reception frequency at which the data of one strength is lost while the data of the strength is lost, the signal strength of the new reception frequency is displayed among the N display units. Control means for controlling display on one display unit located at one end of the receiver. 2. The display device of a receiver according to claim 1, wherein said detection storage means switches said reception frequency in ascending order or descending order at a predetermined step frequency.