JPH10284995A - Synthesizer receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize preset of a satellite station. SOLUTION: When a preset key is operated, data of a frequency of a broadcast station are written in the data area of a memory 34 by an area call. In the case that any of data areas of the memory 34 is designated and a data change key is operated, data such as location of the satellite station of a corresponding broadcast station are read from a data table and the data such as location are displayed on a display element 50. When a prescribed key is operated during the display, frequency data corresponding to the data such as location used for the display are written in a designated data area of the memory 34. When any of channel selection keys P1-P7 is operated, frequency data are read from the data area corresponding to the operated channel selection key among the data areas of the memory 34 and the frequency division ratio of a variable frequency divider circuit 22 is changed and a channel is selected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a synthesizer receiver having a preset function.

[0002]

2. Description of the Related Art Generally, a receiver of a synthesizer system using a PLL can preset a broadcasting station to a tuning key, and when the tuning key is pressed, the broadcasting station is preset to the pressed key. A broadcasting station can be selected.

In this case, the preset is to write the data of the reception frequency, for example, the frequency division ratio of the variable frequency dividing circuit of the PLL, to the address of the memory corresponding to the tuning key. Tuning is realized by reading the frequency division ratio from the address corresponding to the depressed tuning key and setting it in the variable frequency dividing circuit. The number of tuning keys is generally about 5 to 9 keys.

[0004] As a method of writing the frequency division ratio into a preset memory, there is a method called "area call". In this method, for example, the whole of Japan is divided into several areas (areas), and when that area is selected, data of frequencies that can be received in that area is read out from a database in a ROM and written into a preset memory.

Therefore, according to this area call,
Anyone can easily preset.

[0006]

By the way, some broadcasting stations prepare a relay station called a satellite station in an area where reception conditions are poor, such as a mountainous area, and transmit their own station (with the parent station) through the satellite station. (Broadcasting station) is broadcasted at a different frequency to improve the reception condition. For example, in Hokkaido, NHK and local private broadcasters each provide a plurality of satellite stations.

For this reason, if the satellite stations can be preset to the tuning keys, the number of tuning keys increases. Moreover, in some of them, broadcast stations that cannot receive broadcasts are preset. However, if that is not the case, unless the satellite station is preset as the channel selection key, the satellite station is naturally selected manually.

The present invention solves such a problem, and particularly makes it possible to easily preset a satellite station. In this specification, a satellite station is not limited to a relay station that transmits the broadcast contents of a parent broadcast station as it is, but also changes some programs such as a weather forecast according to the broadcasting area. Broadcasting stations.

[0009]

Therefore, in the present invention, the frequency conversion of the received signal is performed using the signal formed in the PLL, and the frequency division ratio of the variable frequency dividing circuit of the PLL is changed. Thus, in a synthesizer receiver in which the frequency of the signal is changed to change the reception frequency, a plurality of tuning keys, a data table, and a data area corresponding to each of the plurality of tuning keys are provided. And a display element, and the data table is provided so that, when an area used by the receiver is divided into a plurality of areas, a broadcast that can be received in the divided area is provided for each of the divided areas. Station frequency data, satellite station frequency data for that station,
When data of the broadcasting station and the location of the satellite station are stored and the preset key operation is performed by designating one of the divided areas, the broadcast station prepared in the designated divided area is operated. Frequency data is written to the data area of the memory for each broadcasting station. When one of the data areas of the memory is designated and a key operation for changing data is performed, the Data such as the location of the satellite station of the broadcasting station in which the data of the frequency is written in the designated data area is read from the data table, and the location and the like are determined according to the data such as the read location. It is displayed on the display element, and when a predetermined key operation is performed while this display is being performed, the place used for that display is displayed. The data of the frequency corresponding to data such as the ground is written in the specified data area, and when one of the plurality of tuning keys is operated, the operated selection of the data area in the memory is performed. From the data area corresponding to the station key, data of the frequency written in the data area is read, and the frequency division ratio of the variable frequency dividing circuit is changed according to the read frequency data to select a station. Is performed by a synthesizer receiver. Therefore, by selecting a location name or the like, the broadcasting station preset as the tuning key is changed from the master station to an appropriate satellite station.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows an example in which the present invention is applied to an FM teletext receiver called the DARC system. In the FM text multiplex broadcasting of the DARC system, digital data such as text information is transmitted by LMS.
K signal (sub-carrier frequency is 76 kHz)
The SK signal is frequency-multiplexed with the audio signal (monaural signal or stereo composite signal) of the original audio broadcast program, and the frequency-multiplexed signal is transmitted.

In FIG. 1, reference numeral 10 denotes an FM receiving circuit configured in a synthesizer system. A receiving signal from an antenna 11 is supplied to an antenna tuning circuit 12 of an electronic tuning system, and a broadcast wave of a target frequency fRX is transmitted. The signal SRX is extracted, and the signal SRX is supplied to the mixer circuit 14 through the high-frequency amplifier 13, and the frequency fLO is, for example, fLO = fRX−fIF [kHz] (1) where fIF is the intermediate frequency. Then, for example, an oscillation signal SLO of fIF = 10.7 MHz is taken out, this signal SLO is supplied to the mixer circuit 14 as a local oscillation signal, and the frequency of the signal SRX is converted to an intermediate frequency signal SIF (intermediate frequency fIF).

Further, the intermediate frequency signal SIF is supplied to an FM demodulation circuit 16 through an intermediate frequency circuit 15 having an intermediate frequency filter and an amplifier, from which an audio signal (a monaural signal or a stereo composite signal) and The frequency multiplexed signal with the LMSK signal in the FM teletext broadcasting described above is demodulated and extracted.

An audio signal of the demodulated signal is supplied to a speaker 18 through an amplifier 17.
Further, among the demodulated signals of the demodulation circuit 16, the LMSK signal is supplied to the decoder circuit 19, and the character program data is decoded and error-corrected from the LMSK signal and extracted.

At this time, the VCO 21 is connected to the circuit 2
Together with 2 to 25, the PLL 20 is configured. That is, the signal SLO from the VCO 21 is supplied to the variable frequency dividing circuit 22 to divide the frequency into 1 / N, and the frequency-divided signal is supplied to the phase comparing circuit 23 and the oscillation circuit 24
An oscillation signal having a reference frequency, for example, a frequency of 100 kHz is taken out from the VCO 21 through a low-pass filter 25.
Is supplied as the control voltage. Also, the filter 25
Is supplied to the tuning circuit 12 as a tuning voltage.

Therefore, in a steady state, the frequency of the frequency-divided signal from the frequency divider 22 and the frequency of the oscillation signal of the oscillation circuit 24 are equal, and the frequency fLO of the oscillation signal SLO at this time is fLO = N × 0.1 [MHz] ... (2), and from equations (1) and (2), fRX = fLO + fIF = N x 0.1 + 10.7 [MHz] ...
(3)

Therefore, if the frequency division ratio N is changed one by one between 653 and 793, the local oscillation frequency fLO becomes
Since the frequency changes from 65.3 MHz to 79.3 MHz at intervals of 100 kHz, the reception frequency fRX changes in the frequency band of 76.0 MHz to 90.0 MHz in 100 kHz frequency steps and in accordance with the dividing ratio N. Will be.

Further, the FM receiver is provided with a microcomputer 30 for system control. This microcomputer 30 includes a CPU 31 and
ROM 32 for program and RAM for work area
33, a memory 34 for holding data, and a RAM 35 for a buffer for receiving a text program. And memory 3
2 to 35 are connected to the CPU 31 through the system bus 39.

In this case, the ROM 32 has a main routine 100 shown in FIGS. 2 and 3, for example. Although details of the main routine 100 will be described later, FIGS. 2 and 3 only show portions related to the present invention for simplicity.

Further, the ROM 32 has, for example, a data table DTBL as shown in FIG. 4 as a database of frequency data for area calls. That is, in the case of the data table DTBL of FIG. 4, the whole of Japan is divided into 14 areas of "Hokkaido", "Tohoku 1", ..., "Kyushu 2". The data table DTBL contains, for each of the divided areas, data indicating the area name.
ERIA, broadcast station name data KYOKU, and frequency data FR
It has an EQ and location name data SHOZAI.

In this case, the broadcast station name data KYOKU is character data indicating the station name of a broadcast station (including a satellite station) that can practically receive a broadcast somewhere in the corresponding area. The frequency data FREQ is the data of the frequency used by the master station for broadcasting and the data of the frequency used by the satellite station for broadcasting among the broadcasting stations indicated by the data KYOKU. They are prepared in the order of the stations. Further, the location name data SHOZAI is character data such as a location name of an area where the broadcast of the master station or the satellite station corresponding to the data FREQ can be practically received, or a location name of the location of the broadcasting station.

For a broadcasting station without a satellite station, the data FREQ of that frequency and the data SHOZ of the location are used.
AI is not provided. In fact, for example, "Kanto 1"
Includes, as NHK FM broadcast stations, "Tokyo", "Yokohama", "Urawa", etc. Of these broadcast stations, which is the master station and which is the satellite station Although it may not be possible to distinguish between
In one area, the representative broadcast station is a master station, and the remaining stations are satellite stations. ROM 32
Has character data necessary for various displays in addition to the above.

The memory 34 is a ROM capable of electrically erasing and writing data.
Alternatively, although not shown, the battery is a RAM backed up by a battery, that is, the memory 34 is a non-volatile memory, and can hold written data even when the power is turned off.

The memory 34 includes, for example, FIG.
As shown in FIG.
Station data areas A1 to A7 are prepared. And
In each of the data areas A1 to A7, the data FREQ of the frequency of the broadcasting station preset in the channel selection key, the data KYOKU of the station name of the broadcasting station, and the data SHOZAI of the location name of the broadcasting station can be stored. It has been like that. As will be described later, the memory 34 accesses various data that need to be held even when the power of the receiver is turned off.

Further, ports 36 and 37 are connected to the bus 39.
And an interface circuit 38 are connected. Then, the frequency division ratio N is set in the variable frequency dividing circuit 22 from the CPU 31 through the port 36, and channel selection and reception of the receiving circuit 10 are executed. Further, the demodulated signal from the demodulation circuit 14 is supplied to the decoder circuit 19, the character program data is decoded and error-corrected from the LMSK signal and extracted, and the data is stored in the reception buffer RAM 35 through the port 37. .

In the interface circuit 38, as operation keys, cursor keys (down key and up key) KD and KU, an enter key KE, and a menu key K
M, a setting key KS and, for example, seven tuning keys P1 to P7.
Are connected. The keys KD to KS, P1 to P7
Are constituted by non-locking type push switches.

Further, a font ROM (character generator) 41 having font data for converting character data transmitted by FM character multiplex broadcasting into display data is connected to the bus 39, and a display controller 42 is connected to the bus 39. It is connected. The controller 42 is connected with a display memory 43 and, for example, an LCD 50 as a display element.

In this case, the LCD 50 displays characters and the like by a combination of dots, and has a size of, for example, 15.5 characters.times.4.5 lines (width 248 dots.times.length 72 dots) as shown in FIG. The uppermost 0.5 line (vertical 8 dots) region is a header region, and the remaining 4 lines (vertical 64 dots) is a main region for displaying a text.

Further, the memory 43 is a bit map system corresponding to the dot display system of the LCD 50,
It has a capacity of 50 screens. Then, the data held in the reception buffer RAM 35 or the RO
The data prepared in advance in M32 is the CPU
31 and the read data is R
The display data is converted into display data using the font data of the OM 41, and the display data is written to the memory 43 through the controller 42.

At this time, the display data of the memory 43 is repeatedly read out by the controller 42, converted into a display signal, and supplied to the LCD 50. Accordingly, the LCD 50 has the CPU 31
35 or a character based on the character data read from
Characters based on character data prepared in the OM 32 are displayed.

In such a configuration, various processes such as presetting are executed by the CPU 31 as follows.

[Until Waiting for Key Input] Here, a description will be given of a process from turning on the power of the receiver until the receiver waits for key input in a normal state. That is, when the power of the receiver is turned on, the processing of the CPU 31 starts from step 101 of the routine 100, and then, in step 102, the initial setting of each unit is executed. For example, the frequency division ratio N of the last channel (the reception frequency that was received when the power was turned off last time) is read out from the memory 34, and the frequency division ratio N is passed through the port 36 to the variable frequency dividing circuit 2
2 and set. Further, the station name and frequency of the last channel are displayed on the LCD 50 using the data stored in the memory 34. Therefore,
From this point, the last channel is received, and the sound is output from the speaker 18.

Subsequently, the process proceeds to step 103, where the satellite flag SFLG is set to "0". The satellite flag SFLG is "0" when the master station is preset as the tuning key, and is "1" when the satellite station is preset. Then, thereafter, the process proceeds to step 104,
In this step 104, it waits for a key input.

At this time, if text multiplex broadcasting is being performed on the last channel, the decoder circuit 19
The character program data is decoded and error-corrected from the data to be extracted.
5 is accumulated.

In this state of waiting for key input, when the user performs a key input, the key input is performed according to the key input.
Each process is executed as follows.

[Selection of Text Program] This is a case where an arbitrary text program is selected from the main menu (total table of contents) displayed on the LCD 50 and displayed. In this case, first, the menu key KM is pressed.

Then, the processing of the CPU 31 proceeds to step 1
From step 04, the process proceeds to step 111, where it is checked whether the satellite flag SFLG is "0". And in this case, step 103
Since SFLG = "0", the process proceeds from step 111 to step 112. In this step 112,
The keys input in step 104 are tuning keys P1 to P7.
Is checked.

In this case, since the key is the menu key KM, the process proceeds from step 112 to step 120.
In this step 120, the main menu of the text program is displayed on the LCD 50 according to the text data in the RAM 35. When the down key KD or the up key KU is pressed, the cursor moves between the items of the main menu displayed on the LCD 50 according to the keys KD and KU.

Then, when the cursor is moved to the target item of the main menu items and the enter key KE is pressed, the item is selected, and the lower menu of the item is displayed on the LCD 50. Thereafter, by performing the same key operation, the target character program can be displayed on the LCD 50. Thereafter, in step 104, the process waits for a key input.

[Preset of Broadcasting Station] This is a case where a broadcasting station (master station) is preset to each of the tuning keys P1 to P7. This preset is executed by an area call. Therefore, in the case of performing this [preset of the broadcasting station], when the key input is awaited in step 104, the setting key KS is pressed.

Then, the processing of the CPU 31 proceeds to step 1
04 through step 111, and further step 11
2 to step 120. Then, in step 120, a menu for setting the operation mode and the like of the receiver is displayed on LCD 50 in accordance with the key input in step 104. Then, when the down key KD and the up key KU are pressed, the cursor moves between the items of the menu displayed on the LCD 50. Therefore, the cursor is moved to "area setting" of the menu, and the next decision is made. Pressing the key KE switches to the [area setting mode].

In this [area setting mode], the area names “Hokkaido”, “Tohoku 1”,..., “Kanto 1”,. “Kyushu 2” is displayed.
Then, when the down key KD and the up key KU are pressed, the cursor moves between the displayed area names, so that the cursor is positioned on the area name including the receiving place of the user among the area names, and then determined. Press the key KE.

For example, if the receiving location is "Tokyo", the cursor is positioned at "Kanto 1" and the enter key KE is pressed. Then, from the data table DTBL, the data “Broadcasting University”, “NHK-FM”, “F” of the broadcasting station name included in “Kanto 1”
M sound Chiba ",...," FM Yokohama "and the first frequency data" 7
8.8 "," 82.5 "," 78.0 ", ...," 84.7 "and the location name data" Tokyo "," Tokyo "," Chiba ", ...," Yokohama "corresponding to these frequencies are read out. These read data are stored in the memory 34 as shown in FIG.
Are written in the areas A1 to A7, respectively.

That is, when the cursor is positioned at the target area name and the enter key KE is pressed, the data KYOKU of the broadcasting station name of the corresponding area and the frequency data FREQ of the data of the data table DTBL among the data of the data table DTBL. And the data SHOZAI of the location name corresponding to the frequency are read out and written into the areas A1 to A7 of the memory 34, respectively.
However, in this case, for a broadcasting station having data of the master station and satellite stations, the data FREQ of the master station frequency is written as the frequency data FREQ. When the data table DTBL does not have the data of the corresponding station name KYOKU, the data of the frequency FREQ, and the data of the location name SHOZAI for seven stations, the data of some broadcasting stations are used redundantly. Further, the data EERI of the area name at this time is held in the memory 34.

When the above process is completed, the process returns from step 120 to step 104, and waits for a key input again.

Therefore, the broadcasting stations are preset to the tuning keys P1 to P7 by area calls.
Also, the preset broadcasting stations at this time are all master stations.

[Selection of preset broadcast station] This is achieved by selecting preset keys P1 to P7 by [preset of broadcast station].
This is a case where a preset broadcasting station is selected.
In this case, when a key input is awaited in step 104, the selected tuning keys Pm (m = 1 to 7) of the preset broadcasting station among the tuning keys P1 to P7 are preset. Any of the following).

Then, the process of the CPU 31 proceeds from the step 104 to the step 112 through the step 111 as described above. In this case, since the tuning key Pm has been pressed, the process proceeds from the step 112 to the step 131. In step 131, it is checked whether or not the tuning key Pm pressed in step 104 has been pressed, for example, for 2 seconds or more.

In the case of [selection of a preset broadcasting station], since the tuning key Km is pressed only for a short time as described above, the processing proceeds from step 131 to step 132, and At 132, the tuning key Pm is selected from the data areas A1 to A7 of the memory 34.
The data FREQ of the frequency written here is read out from the area Am corresponding to the above, and the read data FREQ is converted into the frequency division ratio N according to the equation (3). N is set in the variable frequency dividing circuit 22.

Therefore, the frequency indicated by the read data FREQ becomes the reception frequency fRX of the reception circuit 10,
That is, the broadcasting station preset in the tuning key Pm has been selected.

Subsequently, the process proceeds to a step 133, in which an area Am corresponding to the tuning key Pm among the data areas A1 to A7 of the memory 34.
From, the data of the broadcasting station name written here KYOKU
And the data SHOZAI of the location name are read, and the read data KYOKU and SHOZAI are converted into display data by the data in the ROM 41 and then supplied to the controller 42. For example, as shown in FIG. The broadcast station name and the location name are displayed on LCD 50.

At this time, the data FREQ of the frequency read in step 132 is similarly converted into display data and supplied to the controller 42. For example, as shown in FIG. LCD50
Is displayed digitally.

Subsequently, the process proceeds to step 134. In this step 134, for example, the frequency data FREQ and the station name data KYOKU used in the display of FIG.
By referencing the data table DTBL using
Satellite station (or master station) currently being broadcast
Is checked, and when a satellite station is prepared, for example, as shown in FIG. 7A, a mark “*” indicating that there is a satellite station is displayed after the number indicating the frequency. . And then
The process returns to step 104 and waits for a key input again.

Therefore, when the tuning key Pm is pressed, a broadcasting station preset in the tuning key Pm can be selected. The LCD 50 also displays the station name, location name, and frequency of the selected broadcasting station. In addition, a satellite station (or master station) may be added to the receiving broadcast station.
If is prepared, this is indicated by the mark “*”.

[Preset of Satellite Station] As described above in [Preset of Broadcast Station], in [Preset of Broadcast Station], the master station is preset in the areas A1 to A7 of the memory 34. Satellite stations are not preset. As described above, depending on the receiving location, the receiving condition may be poor at the master station. Therefore, in such a case, the process of presetting the satellite station instead of the master station is this [preset of the satellite station].

When executing this processing,
First, a master station is selected by [selecting a preset broadcast station]. At this time, if a satellite station is prepared for the master station, as described above (as shown in FIG. 7A), a mark “*” indicating the presence of the satellite station follows the number indicating the frequency. Is displayed.

Thereafter, when waiting for a key input at step 104, the tuning key Pm at the time when the master station is selected is kept pressed for, for example, two seconds or more.
Then, the processing of the CPU 31 proceeds from step 104 to step 111 through step 111 and step 112.
The process proceeds from step 131 to step 141 since the channel selection key Pm has been pressed for more than 2 seconds.

Then, in step 141, the satellite flag SFLG is set to "1".
At 42, for example, as shown in FIG.
Displays a list of location names of the locations of the currently selected broadcasting stations. This list is the data table DT
The BL is displayed using the data SHOZAI of the location name in the column of the currently received broadcast station (master station).

For example, if the currently receiving broadcast station (master station) is
"NHK-F" in the area "Kanto 1" of the data table DTBL
M ”, the location name data SH prepared in the data table DTBL for this“ NHK-FM ”
Since OZAI is “Tokyo”, “Chiba”,..., “Urawa”, these location names are displayed as shown in FIG. 7B.

At this time, the character "Tokyo" indicating the first location name is displayed in reverse video meaning the cursor (in FIG. 7, for convenience of drawing, the reverse video is indicated by oblique lines. Similar).

Then, the process returns from step 142 to step 104, and waits for a key input. So, next,
When the down key KD or the up key KU is depressed, the process proceeds from step 104 to step 111. In this case, since SFLG is set to "1" in step 141, the process proceeds from step 111 to step 151.
In this step 151, it is determined whether or not the key pressed in step 104 is the up key KU or the down key KD.
Since it is U, the process proceeds from step 151 to step 152.

In this step 152, when the key pressed in step 104 is the down key KD, for example, as shown in FIG. 7C, the cursor (inverted display) displayed on the LCD 50 is changed to the current location name. Is moved from the position of the character indicating to the next position of the character indicating the location name, and the key pressed in step 104 is the down key K
In the case of D, the display is controlled such that the cursor moves from the position of the character indicating the current location name to the position of the character indicating the previous location name.

When the display position of the cursor is moved by one location name in step 152,
The process returns from step 152 to step 104, and waits for a key input. Therefore, pressing the down key KD or the up key KU causes the cursor to move to the LCD.
It can be located at any location name among the location names of the broadcasting stations displayed at 50.

Therefore, the characters of the location name of an arbitrary satellite station (or master station), for example, as shown in FIG.
When the cursor is positioned at "Chiba", enter key KE
When the user presses the button, the process proceeds from step 104 to step 111, and further proceeds to step 161 through step 151.
And in this step 161, step 104
It is determined whether the key depressed is the determination key KE. In this case, since the determination key KE is selected, the process proceeds to step 1.
From 61, the process proceeds to step 162.

Then, in step 162, the satellite flag SFLG is set to "0".
In 3, the data FREQ of the frequency corresponding to the location name of the position where the cursor is displayed among the location names of the broadcasting stations displayed on the LCD 50 is extracted from the data table DTBL. For example, as shown in FIG. 7C, when the cursor is displayed at “Chiba”, the data of “Chiba” corresponds to the frequency data “81.9”.
This data “81.9” is extracted.

Then, the data of the extracted frequency is
FREQ is one of the data areas A1 to A7 of the memory 34.
Key Pm pressed for more than 2 seconds (step 13
The data is written in the data area Am corresponding to the channel selection key Km which triggered the execution of the first and subsequent steps.

Next, in step 164, step 1
At 63, the data FREQ of the frequency written in the data area Am of the memory 34 is converted into a frequency division ratio N, and this frequency division ratio N
Is set in the variable frequency dividing circuit 22. Therefore, from this point on, the reception frequency fRX of the reception circuit 10 is determined by the determination key K
The frequency corresponds to the name of the location where the cursor was located when E was pressed. For example, when the enter key KE is pressed from the state of FIG. 7C, the cursor is positioned at "Chiba", so that the reception frequency fRX is set to a frequency of 81.9 MHz corresponding to "Chiba".

Subsequently, the process proceeds to step 165, and the display of the received frequency on the LCD 50 is changed to the display of the frequency selected in step 164, for example, as shown in FIG. 7D. The display of the location name on the LCD 50 is also changed to the location name corresponding to the frequency, that is, the location name where the cursor is displayed when the enter key KE is pressed.

Then, the process returns to step 104 and waits for a key input again. Since SFLG is set to "0" in step 162 when waiting for key input, even if the key KD, KU or KE is pressed, the process does not proceed to step 151, but proceeds to step 112.
In the subsequent steps, processing such as [selection of preset broadcast station] is performed.

Therefore, when a broadcasting station (master station) is selected by [selecting a preset broadcasting station], and then the location name of a target satellite station is selected, the satellite station is replaced by the master station. Can be preset. And the satellite station preset in this way,
In [selection of preset broadcast station], the station can be tuned in the same manner as the master station by the tuning key Pm.

[Summary] As described above, according to the above-described receiver, the broadcasting stations are selected by the area calls by the selection keys P1 to P1.
The preset master station can be replaced with a satellite station if the reception condition of the preset master station is poor. Therefore, any broadcast can be received in the best condition.

Further, when the master station is replaced with a satellite station, a list of the location names of the satellite stations is displayed as shown in FIGS. 7B and 7C, and the satellite station is selected from the list. Therefore, it is easy to select the optimum satellite station, and the satellite station can be easily selected without knowing the frequency of the satellite station.

Further, since the master station having a bad reception condition is replaced with the satellite station, the tuning keys P1 to P7 are selected.
And the tuning keys P1 to P7
Can preset only stations that can be received well.

Further, keys KD, KU, KE and LCD 50 used for selecting and determining a satellite station are
Since it can be used also as a key provided for receiving M-text multiplex broadcasting, a new key is not required for selecting and determining a satellite station.

[Others] In the above description, the data of the last channel may be stored in the memory 34 in steps 132 and 164, for example. The selection of an area in step 120 and the selection of a channel in step 132 can also be performed by a rotary encoder.

Further, the data FDT of the frequency in the data table DTBL and the memory 34 is
The frequency division ratio N of In the above description, the receiving circuit 10 receives the FM broadcast.
The same configuration can be applied to the case of receiving an AM broadcast or a television broadcast.

[0076]

According to the present invention, the master station preset in the tuning key can be replaced with a satellite station, so that any broadcast station can receive in the best condition.

Further, the satellite stations to be used for replacement can be selected from a list showing the locations thereof, so that replacement is easy.

[Brief description of the drawings]

FIG. 1 is a system diagram illustrating one embodiment of the present invention.

FIG. 2 is a flowchart showing a part of one embodiment of the present invention.

FIG. 3 is a flow chart showing a continuation of FIG. 2;

FIG. 4 is a diagram showing one form of a data table.

FIG. 5 is a diagram showing one form of memory contents.

FIG. 6 is a diagram showing one embodiment of a part of the present invention.

FIG. 7 is a diagram showing one form of display content.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Reception circuit, 14 ... Mixer circuit, 15 ... Intermediate frequency amplifier, 16 ... FM demodulation circuit, 20 ... PLL, 21 ... VC
O, 22: variable frequency dividing circuit, 30: microcomputer, 31: CPU, 32: ROM (for programs and databases), 34: memory (for holding data), 35
... for reception buffer, 41 ... font ROM, 42 ... display controller, 43 ... memory (for display), 50 ... LCD, 100 ... main routine, KD ~
P7 ... operation keys

Claims (2)

[Claims] A frequency conversion of a reception signal is performed by using a signal formed in a PLL, and a frequency of the signal is changed by changing a frequency division ratio of a variable frequency divider circuit of the PLL. A synthesizer-type receiver configured to change a frequency, comprising: a plurality of tuning keys; a data table; a memory having a data area corresponding to each of the plurality of tuning keys; and a display element; When the area where the receiver is used is divided into a plurality of areas, the data table includes, for each of the divided areas, data on a frequency of a broadcasting station that can be received in the divided area and a satellite of the broadcasting station. It has data of the frequency of the station and data such as the location of the broadcasting station and the satellite station. When the operation data of the frequency of the broadcasting stations that are available at the designated divided area for each the broadcast station,
When data is written to the data area of the memory, and one of the data areas of the memory is designated and a key operation for changing the data is performed, frequency data is written to the designated data area for each key operation. The data such as the location of the satellite station of the broadcast station read is read from the data table, and the location is displayed on the display element in accordance with the read data such as the location, and this display is performed. , When a predetermined key operation is performed, the data of the frequency corresponding to the data such as the location used for the display is written into the specified data area, and the plurality of tuning keys are selected. When one is operated, the data area corresponding to the operated tuning key among the data areas of the memory is selected. A frequency data written in the data area is read out, and the frequency division ratio of the variable frequency dividing circuit is changed in accordance with the read frequency data to select a synthesizer. Machine. 2. The synthesizer receiver according to claim 1, further comprising a text multiplex broadcast decoder circuit, wherein a text program by the text multiplex broadcast is displayed on the display element by character data extracted from the decoder circuit. Synthesizer receiver.