JP2579805Y2 - Wireless communication equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

This invention is intended for a multi-function, multi-band or improved operability while reducing the size.
The present invention relates to a single band wireless communication device equipped with multiple functions.

[0002]

In recent years, wireless communication equipment, among others Oite in handy wireless communication machine, contradictory problem that was "equipped with a variety of functions" to "compact size", yet "high-performance" in the "easy to operate" Is imposed.

For example, a multifunctional dual-band transceiver A shown in FIG. 6A is provided with a multifunctional numeric keypad 2 for directly inputting an operating frequency and selecting a function on a front panel 1, and an LCD display device 3. , on the upper panel 4, a knob for channel selection 5 as shown in FIG. (b), the volume control knob 6 and squelch adjustment knob 7 is provided,
In addition to direct channel selection using the numeric keypad 2, a rotary channel selection using a rotary encoder having a natural and easy-to-use operation knob as a channel selection knob 5 is employed to improve operability.

[0004] On the other hand, wireless devices are becoming smaller and more compact due to integration of circuits and the like. However, the switch to operate it, mechanical parts such as a volume maintains good operability, and be such erroneous operation is not performed
Because, since miniaturization is limited, arrangement and <br/> arrangement number to the body is also naturally limited.

[0005] Therefore, as shown in FIG. 5, compact and volume control knob 8 and the squelch adjustment knob 9 to composite, the knob of the upper panel 4 volumes one minute omitted by using a biaxial volume There is something that aimed at.

However , in radio communication, the received signal level and the amount of noise often fluctuate depending on the frequency set at the time of setting the operating frequency. Therefore, it is necessary to adjust the threshold level of the squelch circuit to prevent noise from being output. There are many.

[0007]

However, in the above device, when the operating frequency is changed one after another in order to search for a communication station, for example, the channel selection knob 5 and the squelch adjustment knob 9 shown in FIG. Have to go back and forth many times . Also, when you try to operate only one of either the tuning knob 5 and squelch control knob 9, the spacing of the tuning knob 5 and squelch control knob 9 from narrower imposes a restriction on the space as described above There is a problem that the operability is poor because the finger to be operated may touch the knob of the unintended one by mistake.

At this time, it is conceivable to solve the above problem by combining the channel selection knob 5 and the squelch adjustment knob 9 as a two-axis volume. However, in this case, both the knobs are erroneously turned together. There's a problem. In other words, it can be said that the conventional compounding of the knobs aims at downsizing even if the operability is somewhat sacrificed.

It is an object of the present invention to reduce the size by combining knobs and to improve the operability.

[0010]

In order to solve the above-mentioned problems, in the present invention, a function selection switch is switched.
Adjusts the adjustment volume connected to the arithmetic processing unit.
Operation frequency setting volume and squelch for transmission / reception circuit
Switch to volume for setting threshold level to circuit
In a wireless communication device that can be used interchangeably
In addition to the operating frequency, the operating frequency
Memorize the threshold level of wave number squelch
And adjust the above adjustment volume to the function selection switch.
Switch to the operating frequency setting volume
When the number is set, the threshold corresponding to the operating frequency is set.
Read the memory level from the memory and send it to the squelch circuit.
That is, the configuration was adopted.

[0011]

The radio communication device having the above-mentioned configuration is provided with an adjusting button.
Volume for operating frequency setting with function selection switch
When the operating frequency is set by switching to the
Level is automatically set in the squelch circuit. That
Fine-tuning based on this set threshold level.
Adjustment, the threshold level can be adjusted easily.
Simply can.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a block diagram showing a receiving section of a handy transceiver radio using a PLL circuit 10 as a local oscillation circuit.
A signal received in is amplified by a high frequency circuit (RF) 12, is input to the mixer (MIX) 13. The mixer 13 receives a local oscillation input from a PLL circuit 10 whose oscillation frequency is controlled by N data from a microprocessor (MPU) 14 as an arithmetic processing unit. The receiving frequency is converted to an intermediate frequency and output to an intermediate frequency amplifier (IF) 15. The intermediate frequency amplifier (IF) 15 selectively amplifies the modulated signal. This amplified signal is detected by a detection circuit (DET) 16 and a low frequency amplification circuit (AMP)
The signal is amplified at 17 and output from the speaker 18.

Further, the the detection circuit 16, a squelch circuit (SQL) 19 is provided. In the squelch circuit 19, the threshold level of the squelch circuit is set from the microprocessor 14, and conversely, the open / closed state of the squelch circuit 19 is output to the microprocessor 14. Therefore, the open / close signal causes the microprocessor 14 to set the gain of the low-frequency amplifier circuit 17 or O
N / OFF is controlled to prevent noise from being output from the speaker 18 when there is no sense of intrusion.

[0015] On the other hand, on the front panel 1 of the body, Mai to display frequency, the threshold level, etc. squelch
An LCD display device 3 connected to the microprocessor 14 ;
Input, such as multi-function numeric keypad 2 and function selection switch 20
Means are provided. On the other hand, FIG.
As shown in (1), a two-axis volume control or a rotary encoder is provided, and the installation space for one knob is reduced as compared with the related art. The outer knob 21 of this volume is a volume adjusting knob 21 which is connected to the microprocessor 14 or directly to the low frequency amplifier circuit 17 to adjust the gain of the low frequency amplifier circuit 17 with the set value, and to adjust the output volume. Is controlled. On the other hand, the inner knob 22 as an adjusting volume is a frequency dial and a squelch level adjusting knob 22, and the function selecting switch 20 is switched to select and use the function. At this time, the function selection switch 20 is
Can also function as a frequency lock switch
When the knob 22 is switched from the frequency dial to the squelch level adjustment knob 22, the frequency being communicated is fixed, and interruption of communication due to, for example, erroneous operation of the numeric keypad 2 or the like is prevented.

The microprocessor 14 has a ROM memory 23 in which a control program for the microprocessor 14 and oscillation frequency data of the PLL circuit 10 are written.
And a RAM memory 24 for storing an operating frequency and a squelch threshold level of the frequency.

This embodiment is configured as described above. Next, how to use this radio communication device will be described.

First, the function selector switch 20 is operated to switch the inner knob 22 to a frequency dial, and the knob 22 is turned on.
Is turned to set the operating frequency of the receiving station, the microprocessor 14 reads the set value, reads N data corresponding to the set value from the memory 23, and
And outputs it to. At the same time, the frequency is displayed on the LCD display device 3. When the setting of the operating frequency is completed in this way, the function selection switch 20 is then switched to the squelch level setting to set the squelch threshold level. At this time, the microprocessor 14 reads the set value of the knob 22 as a squelch threshold level, and sets that level in the squelch circuit . simultaneous
A threshold level is displayed on the display device 3,
Conventionally, the adjustment of the threshold level, which has been performed by "intuition", can be performed visually .

For this reason, adjustment becomes easy and operability is improved. Further, the display of the threshold level may be shared with the display of the received signal strength ( so-called S meter ) . Also, when its function selection switch 20 is functioning as a frequency lock switch, therefore, it is not necessary to consider the space for providing a new frequency lock switch to the body.

On the other hand, in order to improve the operability, the microprocessor 14 stores the operating frequency and the threshold level of the squelch in the RAM memory 24 . You
Then, when the operating frequency is set by the knob 22,
The threshold level is automatically set in the squelch circuit 19. Therefore, the threshold level can be set sufficiently by making fine adjustments based on this value .

Thereafter, when the operating frequency is to be changed, the function selecting switch 20 is again switched to the frequency dial to change the operating frequency, and the function selecting switch 20 is again switched to the squelch level setting to adjust the threshold level as described above. Perform

That is, in any case of this adjustment, the frequency setting and the squelch threshold level adjustment can be performed without releasing the hand from the knob 22, so that the frequency can be tuned by a flowing operation and the operability is improved. Can be achieved.

At this time, since the knob 22 is not separated from the hand, the outer knob 21 is not turned by mistake. As described above, this embodiment can reduce the installation space of the volume while improving the operability, so that it is suitable for miniaturization , and the degree of freedom of the layout of the mechanical parts is increased.

In the case of a multi-band communication device, the adjustment volume compounded as described above may be provided for each operating frequency band as shown in FIG.

In this embodiment, a two-axis volume is described. However, as shown in FIG. 3, a volume control knob may be separately provided as a one-axis volume.

[0026]

[Effect] Since this device was constructed as described above ,
Miniaturization while improving the performance
The degree of freedom of Uto also increases.

Further, the squelch when the operating frequency is changed
Threshold level setting is simplified, improving operability.
I can go up.

[Brief description of the drawings]

FIG. 1 is a block diagram of an embodiment.

FIG. 2 is a partial front view of the embodiment.

FIG. 3 is a partial front view of another embodiment.

FIG. 4 is a partial front view of another embodiment.

FIG. 5 is a partial front view of a conventional example.

6A is a perspective view of a conventional example, and FIG. 6B is a plan view of the same.

[Explanation of symbols]

 2 Multi-function numeric keypad 3 LCD display device 5 Tuning knob 6 Volume adjustment knob 7 Squelch adjustment knob 10 PLL circuit 19 Squelch circuit 20 Function selection switch 22 Adjustment volume (inner knob) 24 Memory

Claims (1)

(57) [Scope of request for utility model registration] (1) By switching a function selection switch,
To send and receive the adjustment volume connected to the arithmetic processing unit.
Volume and squelch circuit for setting the operating frequency to the communication circuit
Switch to volume for setting threshold level to
In radio communication apparatus which is adapted to be used Te, with the operating frequency in the processing unit, the operating frequency
Memory to store the squelch threshold level
And adjust the above adjustment volume with a function selection switch.
Switch to the operating frequency setting volume to set the operating frequency.
When set, the threshold corresponding to the operating frequency
Read the level from the memory and set it in the squelch circuit
A wireless communication device characterized in that: