JP2003133913A - Radio receiver and method of presetting reception frequency therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable easy presetting of a desirable broadcast station for reception with a reduced manual operation. SOLUTION: There are provided a receivable channel memory 22 storing a list of frequencies receivable in the reception band of interest, and a display means 27 for displaying the list of the frequencies stored in the receivable channel memory 22. A frequency selected by an operator is associated with a channel number selected by the operator from the list of the receivable frequencies displayed on the display means 27, to store into a preset channel memory 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio receiver capable of automatically searching for a receivable broadcasting station and presetting it.

[0002]

2. Description of the Related Art A conventional general radio receiver will be described below with reference to the drawings. FIG. 5 is a block diagram illustrating the configuration of a conventional radio receiver. In the radio receiver 30 shown in FIG. 5, the FM tuner 13 to which the FM antenna 11 is connected performs channel selection by the FM channel selection signal provided from the control means 21b, and the AM tuner 17 to which the AM antenna 15 is connected. Then, tuning is performed by the AM tuning signal given from the control means 21b. The reception band switching unit 19 selects FM broadcast or AM broadcast output from each tuner based on the reception band switching signal transmitted from the control unit 21b, and the selected signal is amplified by the amplification circuit 2
Output to 9. The sound of the signal amplified by the amplifier circuit 29 is output from the speaker 31.

A preset channel memory 23, an operating means 25b, and a display means 27b are connected to the control means 21b. In the preset channel memory 23, preset broadcast stations are stored in a storage area defined for each preset number in association with a preset number and a reception frequency, and the operating means 25b is an operator of the radio receiver 30. Is an operating means for selecting a channel by using a channel selection button (hereinafter, also referred to as a channel key) associated with a preset number, and for performing other operations, and switching the reception band is also performed by the operating means 25b. Done through. The display means 27b displays a preset number preset by the radio receiver 30, a broadcasting station name, a broadcasting frequency and the like, and also displays a currently selected reception band.

An AM / AM having an auto preset function for automatically presetting a receivable broadcasting station prior to reception.
In the FM radio receiver, the FM broadcast band, which is the higher reception band of the plurality of reception bands, is preset first, and the AM broadcast band, which is the lower reception band, is preset. It has become. These are called auto preset functions,
This is performed by using a search means that sweeps (scans) the reception frequency in a predetermined direction to search for receivable broadcasts. This search means is the control means 21b and the FM tuner 13 (or A
Although it is composed of an M tuner 17), the detailed description thereof is omitted because it is a well-known technique.

FIG. 7 is a diagram illustrating a preset result in a general radio receiver. In the auto preset operation, the frequency sweeper in the search means sweeps (scans) from the lower limit frequency of the FM band toward the upper limit frequency, and then sweeps from the lower limit frequency of the AM band toward the upper limit frequency. When receivable broadcasting stations are detected, the frequencies are preset in the order of detected broadcasting stations from preset number 1 to the maximum preset number in numerical order.

In the example shown in the figure, the data for 6 channels of FM broadcasting are stored in the preset numbers 1 to 6 of FM broadcasting, and the AM is stored in the preset numbers 1 to 6 of AM broadcasting.
Data for 6 channels of broadcasting is stored. In the FM broadcast auto-preset, FM-
Station A, FM-B station, FM-C station, FM-D station, FM-E
The station and the FM-F station are detected in this order, and preset numbers are assigned in this order. Similarly, in AM preset, the AM-A station, AM-B station,
The AM-C station, AM-D station, AM-E station, and AM-F station are detected in this order, and preset numbers are assigned in this order.

FIG. 6 is a flow chart showing the procedure of auto presetting in the conventional radio receiver. Here, it is assumed that the FM band is automatically preset. In FIG. 6, in step S61, it is determined whether or not the auto preset key (AP key) is pressed. If it is pressed, the process proceeds to step S63, and if it is not pressed, this flow is ended. In step S63, the current preset number and the current reception band are temporarily saved in the memory and the process proceeds to step S65. In step S65, the preset number (PSN) is set to 0 and the process proceeds to step S67.

In step S67, the reception frequency is set to the lower limit frequency of the FM band, and the process proceeds to step S69. In step S69, the process waits until the frequency of the PLL of the tuner is locked, and the process proceeds to step S71. In step S71, it is determined whether or not the current frequency is receivable depending on whether or not the electric field strength at the current frequency is equal to or higher than a predetermined value. If the reception is OK, the process proceeds to step S72 and reception is not possible. If so, the process proceeds to step S77. Step S72
Then, the preset number (PSN) counter value is incremented by 1, and in step S73, the received frequency is stored in the preset channel memory area (storage area of the preset channel memory) corresponding to the counter value, and the process proceeds to step S75.

In step S75, the preset number (P
It is determined whether or not the (SN) counter value is the maximum value (for example, 6) of the prepared PSNs, and if it is the maximum value, this flow is ended, and if it is not the maximum value, the routine proceeds to step S77. In step S77, the reception frequency is increased by one step (for example, 100 kHz) and the process proceeds to step S79. In step S79, it is determined whether or not the current frequency is the upper limit value of the FM band. If it is the upper limit value, this flow is ended, and if it is not the upper limit value, the process proceeds to step S69 to continue the search operation.

[0010]

As described above, in the conventional radio receiver, the frequency of the receivable broadcasting station which is auto-scanned from the lower frequency side to the higher frequency side is
Preset number 1 to preset number 6 in the order of detection
Up to the preset number,
That is, it is stored in the memory in association with the channel number. Therefore, even if it is known that there is a broadcasting station that wants to receive at a frequency higher than the frequency set to the maximum preset number (6 in this example), that broadcasting station cannot be preset. was there. Also, since the preset numbers are given in the order they were received,
There is a problem that the operator cannot easily know the preset number of the broadcasting station to be received after the auto preset is completed. In addition, some preset frequencies include
There is also a problem that channels that broadcast almost the same are doubly preset, or noise of a specific frequency is mistakenly recognized as a broadcast wave and preset.

In order to avoid the above-mentioned problems, presetting is performed manually without using the automatic presetting function. In the manual preset, you manually search for the station you want to receive, and when you can receive that station, press and hold the channel key of the number you want to set for a certain period of time. However, there was a problem that it takes a long time to preset.

The present invention has been made in view of the above problems, and an object thereof is to provide a radio receiver which requires less manual operation and can easily preset a broadcasting station to be received. .

[0013]

A radio receiver and a method of presetting a reception frequency thereof according to the present invention have been made to solve the above problems. The first invention is broadcasting capable of sweeping a frequency for reception. , A receivable channel memory for storing a list of receivable frequencies in the reception band detected by the search means, and a display for displaying a list of frequencies stored in the receivable channel memory Means, a preset channel memory for storing a preset reception frequency, and an operation means having a channel key, each selected via the operation means from the list of receivable frequencies displayed on the display means. A radio receiver that stores the frequency in the preset channel memory in association with the channel key. It is a machine.

According to a second aspect of the present invention, in the radio receiver of the first aspect, each reception frequency stored in the preset channel memory is selected from the frequencies displayed on the display means via the operation means. The radio receiver is one frequency, and the selected one frequency is stored in the preset channel memory in association with one channel number designated by the channel key.

According to a third invention, in the radio receiver of the first invention, the frequency to be stored in the preset channel memory is selected from the receivable frequencies displayed on the display means through the operation means. The radio receiver has one or a plurality of frequencies, and the selected frequencies are associated with channel numbers in order of frequency.

A fourth aspect of the present invention is the radio receiver of the first or second aspect, wherein the display means displays a list of receivable frequencies in the reception band, and preset frequencies as preset channels. The radio receiver is designed to display the frequency and the frequency not preset in a distinguishable manner.

A fifth invention is the radio receiver according to any one of the first to fourth inventions, wherein the display means displays each frequency when a list of receivable frequencies in the reception band is displayed. In addition to this, it is a radio receiver that displays the electric field strength at each frequency or a rank indicating the strength of the electric field strength.

According to a sixth aspect of the present invention, there is provided a search step of sweeping frequencies to search for receivable broadcast frequencies, a display step of displaying all receivable frequencies detected in the reception band, and the display step. The selected frequency discriminating step for discriminating which one of the displayed frequencies has been selected, the correlating step for correlating the frequency discriminated in the selected frequency discriminating step with the channel key, and the correlating step in the correlating step. Storing a frequency and a channel key in a preset channel memory, the receiving channel method of the radio receiver.

According to a seventh invention, in the receiving channel method for a radio receiver according to the sixth invention, one frequency among the frequencies displayed in the displaying step and one channel number designated by the channel key are included. Are stored in the preset channel memory as one preset channel.

An eighth invention is the receiving channel method for a radio receiver of the sixth invention, wherein a plurality of frequencies selected from the frequencies displayed in the displaying step are selected,
It is a receiving channel method for a radio receiver, which has a step of associating channel numbers in the order of frequencies, and stores the associated plurality of frequencies and channel numbers in the preset channel memory.

A ninth invention is the receiving channel method for a radio receiver according to the sixth or seventh invention, wherein in the displaying step, when a list of receivable frequencies in the receiving band is displayed, a preset channel is used. This is a method of receiving channels of a radio receiver in which preset frequencies are highlighted, highlighted, or displayed in different colors.

In a tenth aspect of the present invention, in the receiving channel method for a radio receiver according to any of the sixth to ninth aspects, in the displaying step, a list of receivable frequencies in the receiving band is displayed. In addition, it is a receiving channel method of a radio receiver in which the electric field strength at each frequency is displayed in order.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION A radio receiver of the present invention is a radio receiver having a function of presetting a receivable broadcasting station, and sweeps (scans) a frequency to search for a receivable broadcasting station. A list of frequencies of broadcasting stations that can be received in the reception band is stored in the receivable channel memory. Then, a list of frequencies stored in the receivable channel memory is displayed on the display means, the operator selects a frequency to be preset from all the displayed frequencies, and a channel key corresponding to the selected frequency is selected. The operator also specifies the number. In this way, which frequency of all displayed frequencies is assigned to which channel key,
It is a radio receiver designed to be specified by an operator and to store the frequency as a preset channel in a corresponding memory area in the preset channel memory.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the radio receiver of the present invention. The present invention radio receiver 10 shown in FIG. 1 and FIG.
Elements having the same functions and functions as those of the conventional radio receiver 30 shown in FIG. The main difference between the radio receiver 10 of FIG. 1 and the radio receiver 30 of FIG. 5 is that in the radio receiver 10 of FIG.
1, the receivable channel memory 22, the operation means 25, the display means 27, and the key discrimination means 33 are provided. Like the radio receiver 30, the radio receiver 10 also has a search means provided with a frequency sweeper, but its illustration is omitted.

The control means 21 is a microprocessor (MP
U) and a memory to control the entire radio receiver 10. The receivable channel memory 22 is a memory for storing a list of frequencies of receivable broadcasting stations detected by the search means. The list of frequencies stored in the memory is displayed by the display means 27 when the search operation in the reception band is completed or when the frequency of a receivable broadcasting station is detected. The key discrimination means 33 is means for discriminating the key pressed by the operator. Also, the operation means 2
The channel key 35 provided in 5 is a key for the operator to select one frequency from the list of receivable broadcast frequencies and to specify which preset number sets the selected frequency. Shows the preset number. The channel key 35 is also used as a tuning key for selecting a receiving station during reception. The receivable channel memory 22 and the preset channel memory 23 may be configured by a single memory, or a part of the memory of the control means 21 may be used.

FIG. 3 shows a part of the display means 27 and the operating means 25.
An example of the front panel of the radio receiver 10 in which and are arranged is shown. In FIG. 3, the front panel 20 has a display screen 2
An operation unit 25 including 7P and various operation keys is arranged. The display screen 27P is a display screen of the display means 27 and is composed of a liquid crystal display or the like. Channel key 3
Reference numeral 5 is a key indicating a preset number, and keys 1 to 6 are prepared. PS42 is a power key, Vol4
Reference numeral 3 is a volume adjusting volume, and FM / AM 44 is a key for switching the reception band between FM and AM.

Reference numeral 45 denotes an Up / Down key, which is a key for increasing or decreasing the reception frequency by a predetermined frequency width when manually selecting a non-preset broadcasting station. The AP 46 is an AP key, which is an AP key for the operator to instruct the start and end of the auto preset.
Reference numeral l47 is a key for canceling the push button operation. Reference numeral 48 is a frequency selection key for the operator to select the frequency to be preset from the displayed list of receivable frequencies,
The operator moves the pointer on the display screen 27P with the frequency selection key 48 and selects one frequency from the list of frequencies displayed on the display screen 27P.

FIG. 2 is a flow chart showing a first embodiment of the auto preset method according to the radio receiver of the present invention. Here, it is assumed that the automatic presetting is performed in the FM band. In FIG. 2, in step S11, an appropriate display is made at any given time, for example, the reception band in which the search operation is being performed or the current reception frequency is displayed, and the process proceeds to step S13. After determining which key the key is, the process proceeds to step S15. In step S15, when the auto preset mode (hereinafter, also referred to as AP mode) is not set, the AP
It is determined whether or not the key is pressed. If the key is pressed, the process proceeds to step S17, and if not, the process proceeds to step S19.

In step S17, the reception frequency is set to the lower limit frequency of the FM band, the search operation in AP mode, that is, the search operation of the receivable frequency is started, and step S1
Proceed to 9. In step S19, it is determined whether or not the current mode is the auto preset mode (AP mode). If it is the AP mode, the process proceeds to step S21, and if it is not the AP mode, the process proceeds to step S11. In step S21, it is determined whether or not the electric field strength equal to or higher than a predetermined value can be received. If the electric field strength can be received, the process proceeds to step S23.

In step S23, the reception frequency is stored in the receivable channel memory 22, and the process proceeds to step S25. In step S25, the reception frequency is changed to a predetermined frequency, for example, a frequency 100 kHz higher, and then step S27.
Go to. In step S27, it is determined whether or not the current frequency is equal to or higher than the upper limit frequency of the reception band. If the result is affirmative, the process proceeds to step S29, and if not, the step S1.
Go to 1. In step S29, the search operation is completed,
It proceeds to step S31.

In step S31, the list of receivable frequencies is read from the receivable channel memory 22, displayed on the display means 27, and the process proceeds to step S33. Step S
33 includes a selected frequency determining step of determining which frequency the selected frequency is, and the display screen 27
Determine if one frequency is selected on P,
After waiting for the selection, the process proceeds to step S35. A step S35 decides whether or not the selected frequency is already registered as a frequency of the preset channel, and if already registered, the process returns to the step S33, while if not registered, the process proceeds to the step S37. When the process returns from step S35 to step S33, the fact that the selected frequency has already been preset is displayed on the display screen 27P or displayed by voice through the speaker 31 to warn the operator to reselect the frequency. Urge. Step S37 includes a selection number determining step of determining which number the pressed key is, and the channel (CHL)
Waiting for the key to be pressed advances to step S39.

In step S39, the preset number (PS) corresponding to the pressed channel key (CHL key)
N) is already preset, and if preset, it proceeds to step S37, and if not preset, proceeds to step S41. When returning from step S39 to step S37, the pressed CH
A warning that the number of the L key has already been preset is displayed on the display screen 27P or voiced by the speaker 31 to warn the operator to reset the preset number.

In step S41, the selected frequency and the preset number indicated by the pressed CHL key are associated with each other and stored in the preset channel memory 23, and the flow advances to step S43. In step S43, the registered frequency display stored in step S41 is displayed in bright or dark, highlighted, or the display color is changed so that it can be easily distinguished from the unregistered frequency. In step S45, it is determined whether or not all the channel key numbers have been set. If set, the process proceeds to step S47, and if there are unset numbers, step S3.
Go to 3. In step S47, the AP mode is released and the process proceeds to step S11. When the operator presses the AP key 46 during the operation in the auto preset mode, the AP mode is canceled by the interrupt process and the process returns to step S11.

Further, steps S31 to S47
Although illustration of general display processing and key processing is omitted, the display means 27 can perform various display processing (not shown) at any given time. The content to be displayed varies depending on the time, but, for example, the information for making it easier for the operator to press the operation key is displayed. For example, while operating in the auto preset mode (AP mode), one frequency currently selected by the operator from the list of receivable frequencies displayed on the display screen 27P is displayed by blinking, or six frequencies are displayed. Displays a list of channel keys (CHL keys) (or preset numbers indicated by the CHL keys) to distinguish between set numbers and unset numbers in different colors, or to increase the brightness of unset numbers. By highlighting or flashing it, the operator can distinguish which keys can be pressed in a shorter time,
You can press the key in a shorter time.

Further, only the CHL key numbers (preset numbers) which are not preset may be displayed in a list format so that the preset numbers can be selected more quickly. Furthermore, instead of performing the above-described highlighting on the display screen 27P,
It is also possible to light or blink the channel key itself corresponding to the preset number which is not preset. Furthermore, if the electric field strength at each frequency or the rank representing the strength of the electric field strength is displayed together with each frequency displayed on the display means 27, the operator can set the frequency so that only the broadcast having a particularly large electric field strength is preset. It is also easy to select. Also, when displaying all receivable frequencies in the reception band detected in the search step, the operator selects the broadcast frequency with the highest electric field strength by displaying in order from the highest electric field strength at that frequency. Then you can easily preset.

FIG. 4 is a diagram illustrating the result of channel presetting according to the radio receiver of the present invention. As described above, in the auto preset operation, the frequency sweeper in the search means sweeps (scans) from the lower limit frequency to the upper limit frequency of the FM band, and after the preset in the FM band is completed, the AM band The sweep is performed from the lower limit frequency to the upper limit frequency. In the example shown in FIG. 4, the order in which the frequencies are detected as receivable frequencies by the search operation is as shown in FIG. 7, but the operator presets the preset frequencies FM-E, FM-C, FM-D, FM-
A, FM-G, and FM-H are selected in this order, and channel numbers 6, 2, 1, 3, 4, and 5 are given to these respectively. For example, the FM-A station selected fourth as the receivable broadcasting station is not preset number 1 but preset to the preset number (PSN) 3 selected by the operator.

The FM-B station detected next to the FM-A song is not preset as a receivable broadcasting station, but the FM-E station selected first is preset to the preset number (PSN) 6. FM is assigned to preset numbers 4 and 5, respectively.
-G station and FM-H station are preset. FM-G
The frequency of the station and the frequency of the FM-H station are higher than the frequency of the FM-F station shown in FIG. 7, and it is a broadcasting station which cannot be preset by the conventional radio receiver, but according to the present invention, the FM-G station,
It is also possible to preset the FM-H station.

In the flow chart shown in FIG. 2, the operator specifies the channel key number to be preset for each frequency in order to allow the operator to preset with the favorite channel key number. In order to reduce the number of operations performed by the operator, the channel key numbers may be automatically assigned, and in this case, of course, it does not depart from the gist of the present invention.

In this case, the operator selects a plurality of frequencies up to 6 from the list of receivable frequencies displayed on the display means 27, and then presses the channel key 1. After it is detected that the channel key 1 has been pressed, the channel number 1 is assigned to the lowest frequency broadcast and the channel number 6 is assigned to the highest frequency broadcast for the plurality of frequencies selected by the operator. In this way, preset numbers are given in order from the lowest received frequency.

FIG. 8 is a flow chart showing a second embodiment of the auto preset method according to the radio receiver of the present invention. In the flowchart shown in FIG. 8, step S1
Since steps 1 to S31 are the same as in the case of the flowchart shown in FIG. 2, description thereof will be omitted. In the flowchart shown in FIG. 8, when the process proceeds from step S31 to step S51, the display screen 2 is displayed at step S51.
It is determined whether or not one or a plurality of frequencies are selected on the 7P, the selection is waited for, and the process proceeds to step S53.
In step S53, the selected frequency is highlighted and the process proceeds to step S55.

In step S55, the CHL whose number is "1"
It is determined whether or not the key is pressed. If the result is affirmative, the process proceeds to step S57, and if the result is no, the process proceeds to step S51. In step S57, for the selected plurality of frequencies,
Give the channel key numbers in order of frequency. That is, the channel number 1 is associated with the lowest frequency, and the channel number 6 is associated with the highest frequency. Step S59
Then, the associated frequency and channel key number are stored in the preset channel memory 23, and step S6 is performed.
Go to 1. In step S61, the AP mode is released and the process proceeds to step S11.

As described in detail above, according to the embodiment to which the present invention is applied, the frequency is swept (scanned).
Then, a receivable broadcast station is searched for, and a list of frequencies of broadcast stations receivable in the reception band is stored in the receivable channel memory. Then, the list of frequencies stored in the receivable channel memory is displayed by the display means. The operator of the radio receiver selects one frequency to be preset from all the displayed frequencies and designates the channel key number corresponding to the selected frequency.

In this way, the operator designates which of the displayed receivable frequencies is assigned to which channel key, and stores it in the preset channel memory. Therefore, the operator can preset a frequency to be registered as a preset channel with a desired channel number. That is, it is possible to solve the problem that the broadcast station desired to be preset cannot be preset due to lack of channel keys, and the operator can easily know the correspondence between the preset preset number and the preset broadcast station.

When the operator selects a preset frequency on the display screen, if all frequencies to be preset are selected first, a channel number is automatically added to each of the selected frequencies. Therefore, the number of manual operations for channel preset can be reduced.
Further, by highlighting selectable frequencies or highlighting preset frequencies, it is possible to facilitate the frequency selection operation by the operator. Needless to say, the auto preset method according to the present invention can be applied to an audio device including a radio receiver.

[Brief description of drawings]

FIG. 1 is a block diagram showing an example of a radio receiver of the present invention.

FIG. 2 is a flowchart showing a first embodiment of a channel method according to the radio receiver of the present invention.

FIG. 3 is a diagram showing an example of a front panel of the radio receiver of the present invention in which a part of display means and an operating means are arranged.

FIG. 4 is a diagram illustrating a result of a channel according to the radio receiver of the present invention.

FIG. 5 is a block diagram showing an example of a conventional radio receiver.

FIG. 6 is a flowchart showing a procedure of auto-preset in a conventional radio receiver.

FIG. 7 is a diagram illustrating a result of a channel according to a conventional radio receiver.

FIG. 8 is a flowchart showing a second embodiment of an auto preset method according to the radio receiver of the invention.

[Explanation of symbols]

13 FM tuner 17 AM Tuner 19 Reception band switching means 21 Control means 22 Receivable channel memory 23 preset channel memory 25 Operation means 27 Display means 29 Amplification circuit 31 speakers 33 key discrimination means 35 channel key 48 Frequency selection key on operating means

Claims (10)

[Claims] 1. A search means for sweeping a frequency to search for a receivable broadcast frequency, a receivable channel memory for storing a list of receivable frequencies in the reception band detected by the search means, and the reception. Display means for displaying a list of frequencies stored in the available channel memory,
A preset channel memory for storing a preset reception frequency, and an operating means having a channel key, each frequency selected via the operating means from the list of receivable frequencies displayed on the display means, A radio receiver characterized by storing the preset channel memory in association with the channel key. 2. Each reception frequency stored in the preset channel memory is one frequency selected from the frequencies displayed on the display means through the operation means, and the selected one frequency is 2. The radio receiver according to claim 1, wherein the radio receiver is stored in the preset channel memory in association with one channel number designated by the channel key. 3. The frequency stored in the preset channel memory is one or a plurality of frequencies selected through the operating means from the receivable frequencies displayed by the display means, and each of the selected frequencies is selected. The radio receiver according to claim 1, wherein channel numbers are associated with frequencies in order of frequency. 4. The display means, when displaying a list of receivable frequencies in the reception band, distinguishably displays preset frequencies and non-preset frequencies as preset channels. The radio receiver according to claim 1 or 2. 5. The display means, when displaying a list of receivable frequencies in the reception band, displays a rank representing the electric field strength or the strength of the electric field strength at each frequency together with each frequency. The radio receiver according to any one of claims 1 to 4. 6. A search step of sweeping a frequency to search for a receivable broadcast frequency, a display step of displaying all receivable frequencies detected in the reception band, and a frequency of the frequency displayed in the display step. A selected frequency determining step of determining which of the selected is selected,
A step of associating the frequency discriminated in the selected frequency discriminating step with a channel key, and a step of storing the frequency and channel key correlated in the correlating step in a preset channel memory. Radio receiver receiving channel method. 7. One of the frequencies displayed in the display step and one channel number designated by the channel key are associated with each other and stored as one preset channel in the preset channel memory. 7. The receiving channel method for a radio receiver according to claim 6, wherein: 8. A step of associating a channel number in order of frequency with a plurality of selected frequencies among the frequencies displayed in the displaying step, and the plurality of associated frequencies and channel numbers. Is stored in the preset channel memory.
The receiving channel method of the described radio receiver. 9. In the displaying step, when displaying a list of receivable frequencies in the reception band, frequencies preset as a preset channel are highlighted, highlighted, or displayed in different colors. A receiving channel method for a radio receiver according to claim 6 or 7. 10. The display step, in the case of displaying a list of receivable frequencies in the reception band, displaying in order of electric field strength at each frequency. The receiving channel method of the radio receiver described in.