JPH0846490A - Receiver - Google Patents

Abstract

PURPOSE:To enable excellent reception by automatically switching the frequency to another station when the reception state is deteriorated by switching among the plural reception frequencies stored corresponding to a preset switch according to the reception state. CONSTITUTION:A work switch 35 which direct the reception by selecting excellent one of the two frequencies stored in a preset memory 32 corresponding to the same preset switch 36 based on its reception state. With the network processing, if one of the preset switch 36 (one of the switches SW1-5) is selected, the broadcasting wave stored in the group A and the group B of the preset memory 32 work to complement each other. The frequency is switched automatically to the one with higher reception level. Even though the electric field intensity is changed and the reception state is deteriorated, the reception frequency is switched to the one with the higher reception level automatically. Thus, the good reception state can be presented at all times.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving device such as a radio having a preset function in which an arbitrary receiving frequency is stored in advance and which can be read out by a simple switch operation. The present invention relates to a receiving device having a function of switching to a frequency with a good reception state and receiving it while being broadcast.

[0002]

2. Description of the Related Art In a radio receiver, in order to easily select a reception frequency, a frequency having a high electric field strength capable of receiving good sound and a frequency of a favorite broadcasting station are stored in a memory in advance (hereinafter referred to as preset). In addition, a preset channel selection system is adopted in which a desired reception frequency can be selectively received by a one-touch operation of a push button switch or the like when in use.

FIG. 5 is a block diagram showing the configuration of a conventional FM radio receiver. Hereinafter, description will be given with reference to the drawings. Reference numeral 6 denotes a detection demodulation unit for detecting / demodulating the received radio wave, which includes an antenna 61 for receiving the radio wave, a high frequency amplifier 62 for amplifying the received radio wave, and a local oscillation signal having a frequency corresponding to the reception frequency for obtaining an intermediate frequency. A local oscillator 63, a mixer 64 that creates a frequency difference (intermediate frequency) from the reception frequency and the local oscillation frequency, an intermediate frequency amplifier 65 and an intermediate frequency amplifier 6 that amplify the output of the intermediate frequency obtained by the mixer 64.
It is composed of a detection demodulator 66 that detects and demodulates the signal obtained in step 5 to convert it into an audio signal. Reference numeral 2 denotes an output unit for reproducing sound, which includes an audio amplifier (also called a low frequency amplifier) 21 for amplifying the audio signal from the detection demodulator 66 and a speaker 22 for reproducing the sound.

Reference numeral 7 denotes a preset section for calling a reception frequency of a broadcast of a desired frequency with one touch by a switch operation, and a preset switch 76 for selecting a reception frequency stored in advance (for example, five preset switches are SW).
There are about 1 to SW5, and the A-B mode selector switch 73 switches and stores them to the preset memory 72 (A1) of the A group and the preset memory 72 (B1) of the B group in correspondence with one preset switch 76 (SW1), Similarly, a total of 10 frequencies can be stored), a preset memory 72 in which the frequency of the broadcasting station is stored corresponding to the selected preset switch 76, and a frequency is automatically preset in accordance with an instruction from the microcomputer 71. An auto preset switch 74 for activating the auto preset operation stored in 72 and a microcomputer 71 for controlling the preset section 7 in general. In addition to the preset control, the microcomputer 71 instructs the detection demodulator 6 (local oscillator 63) to oscillate at a frequency corresponding to the reception frequency, and presets the reception signal level sent from the intermediate frequency amplifier 65. The reference signal levels (normally set to the minimum electric field strength required to obtain a good reception condition) are also compared.

Next, a method (operation) of storing and calling the frequency of the broadcast wave in the preset memory 72 will be described. In the auto-preset method, when the auto-preset switch 74 is operated, the reception frequencies are sequentially scanned based on an instruction from the microcomputer 71, and the reception / detected reception signal level of each reception frequency (output signal level of the intermediate frequency amplifier 65). Is compared with a reference signal level preset in the microcomputer 71, and if the received signal level is higher, the received frequency is registered in the preset memory 72. If the received signal level is lower, good voice cannot be obtained, so the received frequency is not stored in the preset memory 72. In this way, the received signal level and the reference signal level of the broadcast waves of all the received frequencies are sequentially compared, and only the frequency of the broadcast wave having the received signal level higher than the reference signal level is automatically preset memory 72.
Is stored. This auto preset operation is AB
Group A (A1 to A5) or group B (B1 to B5) of the preset memory 72 selected by the mode changeover switch 73
5 frequencies (10 frequencies in total for the A group and the B group) are stored in order from the highest reception level.

When listening, the AB mode selector switch 73 and the preset switch 76 (SW1 to SW5)
Just by pressing, the microcomputer 71 causes the preset memory 72 (A1 to A5 (or B1 to B5) corresponding to the switch to be pressed.
The frequency is read from 5)), and the detection amplification unit 6 is controlled so that the read frequency is used as the reception frequency.

[0007]

When the automatic presetting is performed by comparing the received signal level with the reference signal level necessary for obtaining good sound as in the conventional case, a broadcasting station having a strong electric field strength is preset. Easy one-touch tuning. However, in the case of an on-vehicle receiving device, particularly an FM receiver, since the receiving range is narrow, the positional relationship between the broadcasting station and the vehicle (distance, obstacles, etc.) may change during traveling even if preset, and accordingly. And the electric field strength also changes (weakens)
Noise may increase or reception may become impossible. In such a case, it is necessary for the user to manually switch to another broadcasting station (frequency) that is broadcasting the same content by operating a tuning switch such as a preset switch.

The present invention solves such a problem, and an object of the present invention is to automatically switch to another broadcasting station (frequency) when the reception condition deteriorates so that good reception can always be performed. To do.

[0009]

In order to achieve the above object, the present invention relates to a plurality of preset memories for storing broadcast frequencies and a preset memory corresponding to the preset switches when the preset switches are operated. A preset receiving means for receiving a broadcast wave having a reception frequency, and a mode switching means for switching a plurality of reception frequencies to the same preset switch and storing the same in a corresponding preset memory. When the reception frequency is selected by an operation, it has a switching means for switching the reception frequency among a plurality of frequencies stored corresponding to the preset switch according to the reception state.

Further, the present invention is characterized by having control means for controlling the operation and non-operation of the switching means. Further, the preset switch is characterized by comprising a switching target switch which is a target of frequency switching by the switching means and a non-switching switch which is not a target of frequency switching by the switching means.

Further, an auto preset means for sweeping the reception frequency to store a receivable frequency in the preset memory and performing an auto preset operation, and an auto preset operation by the auto preset means correspond to the switching non-target switch. It is characterized in that it is provided with an auto preset limiting means for performing only for the preset memory.

[0012]

According to the present invention, when the reception frequency is selected by operating the preset switch, the switching means switches the reception frequency stored in the plurality of preset memories corresponding to the preset switch according to the reception state. The received frequency. Therefore, even if the radio wave condition changes, it is possible to always receive, for example, the broadcast of the same content or the broadcast of the similar content at a frequency with a good reception state.

In addition, the frequency stored in a plurality of preset memories corresponding to one preset switch is changed according to the receiving state so that the frequency is always changed to the best receiving state. The frequency stored in the preset memory can be independently selected and the operation of increasing the receivable frequency can be selected by operating the preset switch.

Further, by dividing the preset switch into a switch subject to switching and a switch not subject to switching, both listening in the best reception state and increasing the number of receivable frequencies by operating the preset switch are compatible. Can be made. Also, since the auto preset operation is not performed for the preset memory corresponding to the switch subject to switching by the auto preset limiting means, the frequency stored in the preset memory corresponding to the switch subject to switching is cleared even if auto preset is performed. It remains without.
Therefore, for example, it becomes unnecessary to redo the frequency storing operation of the broadcasting stations having the same content or similar content for each auto preset operation, and the operability is improved.

[0015]

1 is a block diagram showing the configuration of an FM radio receiver according to an embodiment of the present invention. Hereinafter, description will be given with reference to the drawings. Reference numeral 1 is a detection demodulation unit that detects and demodulates received radio waves, and antennas 111 and 112 that receive the radio waves, high frequency amplifiers 121 and 122 that amplify the received radio waves, and oscillate a frequency corresponding to the reception frequency to obtain an intermediate frequency. Local oscillators 131 and 132, mixers 141 and 14 that generate a difference frequency (intermediate frequency) from the reception frequency and the local oscillation frequency.
2, intermediate frequency amplifiers 151 and 152 for amplifying the intermediate frequency outputs obtained by the mixers 141 and 142, and a switch 17 for selecting the outputs of the intermediate frequency amplifiers 151 and 152 and transmitting them to the detection demodulator 16 in the subsequent stage, And a detection demodulator 16 that detects and demodulates the output signals of the intermediate frequency amplifiers 151 and 152 transmitted by the switch 17, and converts the output signals into a voice signal. Reference numeral 2 denotes an output unit for reproducing sound, which is composed of a sound amplifier (also called a low frequency amplifier) 21 for amplifying the sound signal from the detection demodulator 16 and a speaker 22 for reproducing sound.

Reference numeral 3 denotes a preset unit for receiving a broadcast of a desired frequency by a switch operation with one touch, and a preset switch 3 for selecting a reception frequency stored in advance.
6 (eg, 5 preset switches SW1 to SW5
There is a certain degree, and by the AB mode changeover switch 33, the preset memory 32 (A1) of the A group and the preset memory 32 (B1) of the B group selectively correspond to one preset switch 36 (SW1), and a total of 10 frequencies can be stored and read), a preset memory 32 for storing the frequency of the broadcasting station corresponding to the selected preset switch 36, an AB mode changeover switch 33, and the same preset switch. The preset memory 32 includes a network switch 35 for instructing to select and receive one of the two frequencies having a better reception state, and a microcomputer 31 for controlling the preset unit 3 in general. The microcomputer 31 performs preset control as well as the detection demodulation unit 1 (local oscillators 131 and 13).
2) Instruct to oscillate at the frequency corresponding to the reception frequency, and the intermediate frequency amplifier (151 and 152)
The received signal level sent from the device is also compared with a preset reference signal level (usually set to the lowest electric field strength required to obtain a good reception state).

Also, the network switch 35 is preset switch 36 (SW1) at the time of preset selection.
Corresponding to the network mode for receiving by switching to the higher frequency of the two frequencies stored in the preset memory 32 (A1, B1), selected by the preset switch 36 and the AB mode changeover switch 33. Preset memory 3 determined according to the selected mode
It is operated to select the normal mode in which the only frequency stored in 2 is the reception frequency.

FIG. 2 is a flow chart showing the processing executed by the microcomputer 31 in this embodiment, (a) is a network processing, and (b) is a flow chart showing preset processing. Hereinafter, description will be given with reference to the drawings. First, the network processing will be described. This process is receiving radio,
In addition, it is performed during preset reception in which the reception frequency is set by the preset switch 36.

In step S1, it is determined by the state of the network switch 35 whether or not to perform network processing. If network processing is selected, one preset switch 36 (SW
1) to SW5), the broadcast waves of two frequencies stored in the groups A and B of the preset memory 32 work so as to complement each other, and automatically select one of the two frequencies. The frequency is switched to the one with the higher reception level. If the network switch 35 is on, the process proceeds to step S2, and if it is off, the process ends.

In step S2, n of the A group of the preset memory 32 is associated with the nth preset switch 36.
The signal level of the frequency stored in the second memory,
The magnitudes of the signal levels of the frequencies stored in the nth memory of the B group are compared. This causes the microcomputer 31 to instruct the local oscillators 131 and 132 of the detection demodulation unit 1 to oscillate at the local oscillation frequencies corresponding to the reception frequencies of the A group and the B group (for example, the reception frequency of the A group is the local oscillator 1).
31). As a result, the broadcast waves of the respective reception frequencies pass through the mixers 141 and 142 and the intermediate frequency amplifiers 151 and 15
2 is output. The microcomputer 31 uses this intermediate frequency amplifier 1
The signal levels of the respective reception frequencies are compared by comparing the magnitudes of the output (signal) levels of 51 and 152. If the reception level of the group A (output of the intermediate frequency amplifier 151) is high, the process proceeds to step S3, and if the reception level of the group B (output of the intermediate frequency amplifier 152) is high, the process proceeds to step S4.

At step S3, the switch 17 is controlled so as to output the output of the reception frequency of the group A of the preset memory 32 corresponding to the selected preset switch 36. That is, the microcomputer 31 instructs the switch 17 to output the output of the intermediate frequency amplifier 151 to the detection / amplifier 16. In step S4, the switch 17 is controlled so as to output the reception frequency of the B group of the preset memory 32 corresponding to the selected preset switch 36. That is, the microcomputer 31 instructs the switch 17 to output the output of the intermediate frequency amplifier 152 to the detection / amplifier 16.

Next, the preset process will be described.
This process is started when one of the preset switches 36 (SW1 to SW5) is selected (pressed).
The A and B mode changeover switch 33 is manually selected in advance by the user. In step S11, it is determined whether or not the operation time of the preset switch 36 (the time during which the preset switch 36 is kept pressed) exceeds 2 seconds. This is because the preset switch 36 is selectively used for storing and reading, and it means that the reading (reception) operation is performed for 2 seconds or less and the storage (preset) operation is performed for more than 2 seconds. If it exceeds 2 seconds, the process proceeds to step S12, and if it is less than 2 seconds, the process proceeds to step S15. Step S1
2, whether the preset memory 32 is group A,
It is determined by the state of the A-B mode changeover switch 33 whether or not it is the B group, and the A group and the B group are selected by the user in advance. If it is the group A, step S13
If it is the group B, the process proceeds to step S14.

In step S13, the frequency being received is stored in the preset memory 32 (for example, A1) of the group A corresponding to the operated preset switch 36 (for example, SW1), and the process is ended. That is, the preset switch SW1 is set to 2 with the broadcast wave of the frequency to be stored in the receiving state.
The reception frequency can be preset by pressing and holding for more than a second. In step S14, the frequency being received is stored in the preset memory 32 (for example, B1) of the B group corresponding to the selected preset switch 36 (for example, SW1), and the process ends.

In step S15, since the operation time of the preset switch 36 (duration of pressing and holding) is 2 seconds or less, the number (SW1 to SW5) and mode (SW1 to SW5) of the preset switch 36 which is selected as a receiving operation are selected. The frequency stored in the preset memory 32 corresponding to the selected preset memory group: A group or B group) is read, and the detection amplification section 1 is controlled so that the frequency becomes the reception frequency. The details of this step are the same as the reception processing in the network processing described above.

As described above, according to the present embodiment, by selectively receiving two different frequencies stored in the preset memory corresponding to the same preset switch, the electric field strength changes and the reception state changes. Even if it deteriorates, the receiving frequency is automatically switched to the one having the higher receiving level, so that the user can always listen in a good receiving state.

The above-mentioned preset method and the one-touch channel selection method based on the network configuration have been described by using the FM receiver as an example, but the same can be applied to the AM radio receiver and the television receiver. Further, if the network switch 35 is operated so as not to perform network processing, normal preset (storage, read) reception can be performed as in the conventional case.

FIG. 3 is a block diagram showing the configuration of an FM receiver according to another embodiment of the present invention. Hereinafter, description will be given with reference to the drawings. The configurations of the detection / demodulation unit 1 and the output unit 2 are exactly the same as those in the first embodiment, and therefore their explanations are omitted. Reference numeral 5 is a preset unit for receiving a broadcast of a desired frequency by one-touch operation by a switch, and a preset switch 56 for selecting a reception frequency stored in advance (for example, there are about 5 preset switches SW1 to SW5, and A-B. One preset switch 56 (S
The preset memory 52 (A1) of the A group and the preset memory 52 (B1) of the B group correspond to W1) at the time of selection, so that a total of 10 frequencies can be stored and read), the selected preset A preset memory 52, A for storing the frequency of the broadcasting station corresponding to the switch 56
-B mode changeover switch 53, an automatic preset switch 54 for instructing an operation of sweeping the reception frequency and storing a frequency of a signal level higher than the reference signal level in the preset memory 52, and a microcomputer 51 for controlling the preset section 5 in general. It In addition to the preset control, the microcomputer 51 instructs the detection / demodulation unit 1 (local oscillators 131 and 132) to oscillate at a frequency corresponding to the reception frequency, and is sent from the intermediate frequency amplifiers (151 and 152). The received signal level is also compared with a preset reference signal level (usually set to the lowest electric field strength required to obtain a good reception state).

A part of the preset switch 56 is a network dedicated switch (SW4 to SW in this embodiment).
5) these preset switches 56
A preset memory 52 corresponding to the preset switch 56 (SW4) at the time of channel selection (for example, SW4)
Of the two frequencies stored in (for example, A4, B4), the one with the higher reception level is switched and received. Other preset switches 56 (SW1 to SW
3) is set as a normal preset switch, and when tuning by these preset switches 56 (for example, SW1), the preset switch 56 (SW1) and the preset memory 52 (A1) corresponding to the mode (A or B) at that time are selected. , B1) is the received frequency.

FIG. 4 is a flow chart showing the processing executed by the microcomputer 51 in this embodiment, (a) is a network processing and (b) is an auto preset processing. Hereinafter, description will be given with reference to the drawings. First, the network processing will be described. The network processing is performed during radio reception and during preset reception in which the reception frequency is set by the preset switch 56.

In step S21, the selection operation is performed by judging whether the frequency stored in the preset memory 52 corresponding to the dedicated switch (for example, SW4 to SW5) of the preset switch 56 is received (network reception state). The preset switch 56 is determined to be the network dedicated switch (SW4 or SW5) or the normal preset switch (SW1 or SW2 or SW3). That is, when the reception frequency is selected by the switch (SW4 or SW5), it is received in the network reception state, and the preset memories 32 of the A group and the B group corresponding to one same preset switch 56 (SW4 or SW5).
(2 stored in A1 to A3 (or B1 to B3)
The broadcast waves of one frequency work so as to complement each other, and the reception frequency is automatically switched to the frequency having the higher reception level of the two frequencies. Switch (SW1 to SW
When the reception frequency is selected in 3), normal preset reception processing is performed. Preset switch 56
If the reception frequency is set by the dedicated switches SW4 and SW5, the process proceeds to step S21, and if not, the process ends.

In step S22, the data is stored in the A group (A4 to A5) of the preset memory 52 corresponding to the m-th preset switch (in the present example, the switch operated among SW4 to SW5). Signal level of the broadcast wave of the present frequency and group B (B4 to B) of the preset memory 52.
The signal level of the broadcast wave of the frequency stored in 5) is compared. This causes the microcomputer 51 to instruct the local oscillators 131 and 132 of the detection demodulator 1 to oscillate at the local oscillation frequencies corresponding to the respective reception frequencies of the A group and the B group (for example, the reception frequency of the A group is the local oscillator 131). Corresponding to). As a result, the broadcast wave of each reception frequency is mixed by the mixer 14
It is output to the intermediate frequency amplifiers 151 and 152 via 1,142. The microcomputer 51 compares the levels of the output (signal) levels of the intermediate frequency amplifiers 151 and 152 to compare the signal levels of the respective reception frequencies. And A
If the reception level of the group (the output of the intermediate frequency amplifier 151) is high, the process proceeds to step S23, and if the reception level of the group B (the output of the intermediate frequency amplifier 152) is high, the step S23 is performed.
Go to 24.

In step S23, the changeover switch 17 is controlled to output the output of the reception frequency of the A group of the preset memory 52 corresponding to the selected preset switch 56. That is, the microcomputer 51 instructs the switch 17 to output the output of the intermediate frequency amplifier 151 to the detection / amplifier 16. In step S24, the switch 17 is controlled so as to output the output of the reception frequency of the B group of the preset memory 52 corresponding to the selected preset switch 56.
That is, the microcomputer 51 instructs the switch 17 to output the output of the intermediate frequency amplifier 152 to the detection / amplifier 16.

Next, the auto preset process will be described. This process is started when the auto preset switch 54 is pressed. Dedicated switches (SW4 to SW)
The presetting method to 5) is a manual operation, and its processing is the same as in the flowchart of FIG. Further, in this embodiment, the group A (A1
~ A3) or B group (B1 to B3), one group of preset memories 52 (one selected by the AB mode changeover switch 53) is automatically preset. .

In step S31, the reception frequency is swept over the entire reception range to select a frequency having a reception level higher than the reference signal level. That is, the microcomputer 51 indicates the oscillation frequency to the local oscillator 131, and the mixer 14
The difference frequency is created by 1, and is amplified by the intermediate frequency amplifier 151 and output. The microcomputer 51 compares the output (reception) signal level from the intermediate frequency amplifier 151 with the reference signal level preset in the microcomputer 51. If the received signal level is higher, it is temporarily stored in the memory. The local oscillator 131 is instructed to perform the same operation by changing the frequency, the output level of the intermediate frequency amplifier 151 is compared with the reference level, and if the received signal level is higher, it is similarly stored in the memory. When the sweep of the reception frequency is completed over the entire reception range, the process proceeds to step S32.

In step S32, the broadcast switch detected in step S32 is switched to the dedicated switch (SW) from the detected frequency.
4 to SW5) preset memory 52 (A4 to SW5)
The frequencies stored in A5, B4 to B5) are excluded. This sweeps the frequency and selects a frequency with a high reception level, but the dedicated switch (SW4 to SW
5) corresponding to the preset memory 52 (A4 to A5, B
Those overlapping with the frequencies stored in 4 to B5) are for excluding the preset switch 56 in order to effectively utilize it. When the frequency exclusion is completed, step S3
Move to 3.

In step S33, the upper n stations having high electric field strength (signal level) are selected. In other words, since the number of switches that can be preset (three stations SW1 to SW3 in this example) is limited, the number of stations having a high reception level corresponding to that number is set in the preset memory by corresponding to the preset switch 56 (SW1 to SW3). 52 (A1 to A3, B1 to B
3) Select for storage. Then, when the selection is completed, the process proceeds to step S34.

In step S34, the preset memory 3
It is decided by the state of the A-B mode changeover switch 33 by judging whether 2 is the A group or the B group.
The group and the group B are previously selected by the user. And
If it is the group A, the process proceeds to step S35, and if it is the group B, the process proceeds to step S36. In step S35, the upper n stations (three stations in this example) selected in the previous step S33 are stored in the A group (A1 to A3) of the preset memory 52, and the process is completed. In step S36, the upper three stations are stored in the B group (B1 to B3) of the preset memory 52, and the process is completed.

As described above, according to the present embodiment, even if the electric field strength changes, the frequency is automatically switched to the higher one of the two reception frequencies, so that the user can always listen in a good reception state. In addition, by separately using a switch group that automatically switches and receives two different frequencies and a switch group that performs normal preset reception, the user can store the frequency according to the usage state. Can be effectively used. (By automatically switching between two different frequencies to receive signals, fluctuations in the reception level can be dealt with, but with only two switches, only one broadcasting station (content) can be heard. ). Also, since the auto preset operation is not performed for the preset memory corresponding to the dedicated switch, the frequency of the broadcast station of the same content or similar content manually stored by the user will not be unnecessarily rewritten, and the auto preset processing will be performed. It is no longer necessary to perform the troublesome storage operation of the frequency of the same broadcasting station.

In this embodiment, the FM receiver has been described as an example, but the same can be applied to the AM radio receiver and the television receiver.

[0040]

As described in detail above, according to the present invention, the reception frequency is switched to the frequency stored in the preset memory corresponding to the same preset switch according to the reception state, so that the reception is always good. Broadcast waves can be received in the state.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an FM receiver according to an embodiment of the present invention.

FIG. 2 is a reception flowchart of an FM receiver according to an embodiment of the present invention, (a) is network processing, and (b) is preset processing.

FIG. 3 is a block diagram showing a configuration of an FM receiver according to another embodiment of the present invention.

FIG. 4 is a reception flowchart of an FM receiver according to another embodiment of the present invention, (a) is network processing, and (b) is auto preset processing.

FIG. 5 is a block diagram showing a configuration of a conventional FM receiver.

[Explanation of Codes] 1, 6 ... Detection demodulation section 2 ... Output section 3, 5, 7 ... Preset section 31, 51, 71 ... Microcomputer 32, 52, 72 ... Preset memory 33 , 53, 73 ... AB mode selector switch 54, 74 ... Auto preset switch 35 ... Network switch 36, 56, 76 ... Preset switch

Claims (4)

[Claims] 1. A plurality of preset memories for storing a broadcast frequency, and a preset receiving means for receiving a broadcast wave of a reception frequency stored in a preset memory corresponding to the preset switch when the preset switch is operated. In a receiving device having a preset switch for switching a plurality of reception frequencies and storing the received frequencies in a corresponding preset memory, when the reception frequency is selected by the operation of the preset switch, the reception frequency is received. And a switching means for switching between a plurality of frequencies stored corresponding to the preset switch according to the above. 2. The receiving apparatus according to claim 1, further comprising control means for controlling the operation and non-operation of the switching means. 3. The preset switch comprises a switching target switch which is a target of frequency switching by the switching means and a non-switching switch which is not a target of frequency switching by the switching means. Receiver. 4. An auto-preset means for sweeping a reception frequency to store a receivable frequency in the preset memory and an auto-preset operation by the auto-preset means corresponding to the switching non-target switch. 4. The receiving apparatus according to claim 3, further comprising an auto preset limiting unit that performs only for a preset memory.