JPH02309712A - Scanning device for receiver - Google Patents

Abstract

PURPOSE:To shorten a scanning time by providing a scan frequency width setting means which divides the scan frequency width of frequency converting means in the same band and sets the divisions respectively and a scan control means which puts plural frequency converting means in simultaneous scanning operation with the set scan frequency widths. CONSTITUTION:Two variable frequency oscillators 4A and 4B operate so as to set operation frequencies in the same band. Then the same frequency hand is divided properly by an input means 7 which employs button operation, etc., and two different scan frequency widths are set by a scan frequency width setting means 8. Further, data corresponding to the two scan frequency widths set by this scan frequency width setting means 8 are supplied to a scan control means 8. Then the scan control means 6 puts the two variable frequency oscillators 4A and 4B in simultaneous scanning operation by the closing operation of a start operation switch 9.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention is a receiver (scanner of three It is related to the device.

(Prior Art) Some conventional receivers are capable of simultaneously receiving two different frequencies in the same ham band and in the same mode. This receiver is equipped with two variable frequency oscillators to set two different operating frequencies. Then, while one variable frequency oscillator is used to receive one signal at the set operating frequency, the other variable frequency oscillator is used to perform a scanning operation, thereby making it possible to search for other signals. can.

In addition, in a receiver called a dual bander (or twin bander), there are two different ham bands.
Two different frequencies can be received at the same time. This receiver is equipped with a variable frequency oscillator corresponding to each band in order to set operating frequencies for each of the two bands. One variable frequency oscillator is used to receive signals in one band at a set operating frequency, while the other variable frequency oscillator is used to perform a scan operation in the other band. Signal searches, etc. can be performed.

(Problem to be Solved by the Invention) By the way, in a conventional receiver that can simultaneously receive signals of two different frequencies in the same ham band and in the same mode, it is necessary to receive the signal at the operating frequency of one variable frequency excavator. Regardless of whether reception is being received or not, only the other variable frequency oscillator is used to scan within the band. Therefore, for example, in the 1200 MH2 band Ham band, there is a wide bandwidth of 40 MH2, and there is a problem that the time required for a scanning operation (scanning time) to cover the entire bandwidth is long. For this reason, it is not possible to quickly search for signals, and there has been a demand for further reduction in scanning time.

Further, even in the case of a dual bander, after the scanning operation for one ham band is completed, the scanning operation for the other ham band becomes possible. Therefore, there was a problem in that it was not possible to quickly search for the presence or absence of a signal across two ham bands.

The present invention has been made in view of the above-mentioned circumstances of conventional receivers, and it is an object of the present invention to provide a receiver scanning device that shortens scanning time and enables quick searches.

(Means for Solving Problems: 3) In order to achieve this object, the receiver scanning device of the present invention includes a mixer and a variable frequency oscillator for setting a plurality of operating frequencies within the same band. a plurality of frequency conversion means; a scan frequency width setting means for dividing the scan frequency widths of these frequency conversion means into respective frequencies within the same band; Scan control means for simultaneously scanning the frequency conversion means. Further, a preset means for presetting a plurality of memory channels in the same band is provided, and instead of the scan frequency width setting means, a memory channel group setting means is provided for dividing the plurality of memory channels into a plurality of groups, and the It is also possible to configure the scan control means to simultaneously scan the memory channel groups respectively set by the plurality of frequency conversion means.

Broadly speaking, the receiver scanning device of the present invention includes a plurality of frequency conversion means each including a mixer and a variable frequency oscillator for setting a plurality of operating frequencies within different bands, and a scan frequency of these frequency conversion means. scan frequency width setting means for setting widths within the different bands; and scanning control means for simultaneously operating the plurality of frequency conversion means at the scan frequency widths of the different bands respectively set. It may be configured as follows. Further, a preset means for setting a plurality of memory channels to Pth is provided, and instead of the scan frequency width setting means, a memory channel group setting means for dividing the plurality of memory channels into groups for each band is provided, and the scan control According to the means, the plurality of frequency converting means may be configured to simultaneously perform a scanning operation on the memory channel groups divided into the respective bands.

and an IF output from the plurality of frequency conversion means.
Each signal level detection means outputs a detection signal when the double signal is at a predetermined level or higher, and when the detection signal is output from these signal level detection means, the scan control means stops the scanning operation. It may be configured.

Further, each of the plurality of frequency conversion means includes a signal level detection means for outputting a detection signal when the IF multiplied signal output from the plurality of frequency conversion means is equal to or higher than a predetermined level, and the detection signal is output from these signal level detection means. In some cases, a storage means may be provided for storing data corresponding to a signal given to the frequency conversion means in order to set an operating frequency.

(Function) Multiple frequency converters that set multiple operating frequencies within the same band are frequency-divided within the same band and scanned at the same time using the scan frequency widths set for each. By dividing the frequency into two, the frequency width scanned by one frequency conversion means becomes narrower, and the scanning time becomes shorter accordingly. Furthermore, if multiple memory channels in the same band are divided into multiple groups and the memory channel groups divided by multiple frequency conversion means are simultaneously scanned, the number of memory channels that can be scanned by one frequency conversion means is This reduces the scanning time accordingly.

Furthermore, if a plurality of frequency conversion means each having an operating frequency set in a different band are scanned simultaneously in each different band, it is possible to quickly search for the presence or absence of a signal across a plurality of bands by scanning. Further, if a plurality of memory channels are divided into groups for each band and a plurality of frequency conversion means are used to simultaneously scan the memory channel groups, it is possible to quickly search for the presence or absence of signals in memory channels across a plurality of bands by scanning.

If the scanning operation is stopped by outputting the detection signal, the signal detected by the scanning operation can be quickly received.

Furthermore, if data corresponding to the operating frequency is stored in the storage device based on the output of the detection signal, it is possible to quickly search for a local station or a rare station No. 15 using the data.

(Example) Hereinafter, an example of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a block circuit diagram of an embodiment of a scanning device for a receiver according to the present invention, and FIG. 2 is a diagram illustrating the scanning operation of the two variable frequency oscillators in FIG. FIG. 3 is a flowchart illustrating an example of the operation of the scanning device of the receiver shown in FIG.

First, in FIG. 1, a signal received by an antenna 1 is appropriately amplified by a high frequency amplifier 2, and further branched into two signals, which are then applied to two mixers 3A and 3B. These mixers 3A and 3B have variable frequency oscillation i4A,
A local oscillation signal is given from 4B (VFOA, VFOB). Then, the IF signals whose operating frequencies are frequency-converted from the mixers 3A and 3B are used as squelch circuits 5A and 5B (SQLA, 5QL) as signal level detection means, respectively.
B) is given. These squelch circuits 5A and 5B may be either an S meter squelch or a noise squelch, and have a so-called squelch function, and output a detection signal to the scan control means 6 if the 1F signal is at a predetermined level or higher. I can learn. In addition, the squelch circuit 5
The IF signal outputs of A and 5B are given to the subsequent AF circuit or the next-stage intermediate frequency converter. In addition, mixer 3A,
3B and +iJ variable frequency oscillator 4A, 2 by 4B
A set of frequency conversion means is formed.

Here, the two variable frequency oscillators 4A and 4B both operate to set the operating frequency within the same band. Two different scan frequency widths are then set by the scan frequency width setting means 8 by appropriately dividing the frequency within the same band by manual means 7 by operating a button or the like. Further, data corresponding to the two scan frequency widths set by the scan frequency width setting means 8 is given to the scan control means 6. Therefore, according to this data, the scan control means 6 controls one variable frequency oscillator 4A so that one operating frequency increases and scans in the range of 1260 MH to 1280 MH, as shown in FIG. 2(a), for example. Outputs control signals and other operating frequencies are 128
It outputs a signal that controls the other variable frequency oscillator 4B to descend and scan in the range from 0MH to 1300MH2. Then, by closing the start operation switch 9, the scan control means 6 simultaneously causes the two variable frequency excavators 4A and 4B to perform a scanning operation. Furthermore, when the detection signals are outputted from the squelch circuits 5A, 5B and given to the scan control means 6, the scan control means 6 stops the scan operation of the variable frequency oscillators 4A, 4B, and detects the signals at a predetermined level or higher. Receive.

In addition, in Fig. 2 (a), the frequency range of the 1200 MH2 band ham band is divided into halves, but the invention is not limited to this, and as shown in Fig. 2 (b), one scan frequency width can be narrowed. However, the other scan frequency width may be widened.

Next, the operation of the scan control means 6 will be explained based on FIG. When the start operation switch 9 is operated to open,
First, make sure that the scan frequency width of one variable frequency oscillator 4A is set (step ① in Figure 3).
If the scan frequency width has not been set, the scan frequency width setting means 8 instructs the scan frequency width to be set by dividing the frequency within the band, and reads and sets the set scan frequency width (Step 3 in Figure 3). . Next, check that the scan frequency width of the other variable frequency oscillator 4B is set (step 3 in Figure 3). If it is not set, instruct the scan frequency width setting means 8 to set the scan frequency width. At the same time, the set scan frequency width is read and set (Step 3 in Figure 3). Furthermore, variable frequency oscillator 4A
.

4B are scanned at the same time with the scan frequency width set for each (Step 3 in Figure 3).

■). This scanning operation may change both frequencies within the scan frequency width in an upward direction or in a downward direction, or may change one in an upward direction and the other in a downward direction. Then, the detection signal is detected by the squelch circuit 5A or 5 by the scanning operation of the operating frequency.
The scanning operation is repeated until the detection signal is output from B, and when the detection signal is output (steps ■ or ■ in FIG. 3), the scanning operation is stopped and reception is performed at the operating frequency.

In this configuration, the frequency within the same band is divided into two, and the two frequency conversion means are scanned in their respective ranges, so the frequency range in which the scanning operation is performed by one frequency conversion means becomes narrower, and the scanning time is reduced accordingly. It will be shortened. In particular, if the scanning frequency width of one of the frequency conversion means is set in a narrow range in which quick signal detection is desired as shown in Fig. 2(b), the scanning time is shortened by the narrow scanning frequency width and the scanning can be done quickly. is repeated. Also, squelch circuit 5A or 5B
When an IF multiplied signal of a predetermined level or higher is detected, the scanning operation is stopped, so that the signal can be quickly received by rapid scanning.

A second embodiment of the receiver scanning device of the present invention will be described with reference to FIGS. 4 to 6. FIG. 4 is a block circuit diagram of a second embodiment of the receiver scanning device of the present invention, and FIG. 5 is a diagram illustrating the scanning operation of the two variable frequency oscillators in FIG. 4. FIG. 6 is a flowchart illustrating an example of the operation of the scanning device of the receiver shown in FIG. 4. In FIG. 4, circuit blocks that are the same as those in FIG. 1 are given the same reference numerals and redundant explanations will be omitted.

In FIG. 4, a plurality of memory channels within the same band are preset by a preset means 10 having a memory by a manual means 7. Further, the data of these plurality of Tamori channels are given from the presetting means 10 to the memory channel group setting means 11, and
Through this operation, the memory channel group setting means 11 appropriately divides the plurality of memory channels into two groups.

Then, the data of the memory channel group divided into two is given to the scan control means 12, and the scan control means 12 determines the operating frequency of the memory channels cbl to ahn based on these data, for example, as shown in FIG. A signal is outputted to control one of the variable frequency generators 4A so that the memory channel ch (n
No. 43 is output to control the other variable frequency oscillator 4B so that the operating frequencies of +1) to chm are set. Then, by opening the start operation switch 9, the scan control means 12 simultaneously controls the two variable frequency oscillators 4.
A and 4B are operated to scan each memory channel group. Here, if an IF multiplied signal of a predetermined level or higher is obtained, the scanning operation is stopped and reception is performed at the operating frequency.

Next, the operation of the scan control means I2 will be explained based on FIG. When the start operation switch 9 is closed, first make sure that the memory channel is set properly (see step ■ in Figure 6). If the memory channel is not set properly, use the preset means IO to preset it. (Step ■ in Figure 6)
. Then, check that the memory channel group to be scanned by one variable frequency oscillator 4A is set (see step ① in Fig. 6). If the memory channel group is not set, the memory channel group setting means 1
Step 1 instructs to set the group, and reads the set memory channel group (step ■ in Figure 6). Furthermore, make sure that the memory channel group to be scanned by the other variable frequency oscillator 4B is set (step ① in Fig. 6). If the memory channel group is not set, use the memory channel classification setting means 1②. Instruct to set the memory channel group, and read the set memory channel group (step ■ in Figure 6). Furthermore, a variable frequency oscillator 4A.

4B is simultaneously scanned by the respective set memory channel groups (Steps ■ and ■ in Figure 6). If no detection signal is output from the squelch circuits 5A and 5B during this scan operation (Steps ■ and [ in Figure 6). phase]), the scanning operation continues as it is, and when a detection signal is output (step ① or @l in Fig. 6), reception is performed on the operating frequency.

In this configuration, a plurality of memory channels in the same band are divided into two groups, and two frequency conversion means are operated to scan each memory channel group, so that the number of memory channels scanned by one frequency conversion means is reduced. This reduces the scanning time accordingly.

Further, a third embodiment of the receiver scanning device of the present invention will be described with reference to FIGS. 7 and 8. FIG. 7 is a flowchart explaining the operation of the third embodiment of the receiver scanning device of the present invention, and FIG. 8 is a diagram explaining the scanning operation of the two variable frequency oscillators in FIG. be. Note that the block circuit diagram is the same as that in FIG.

The third embodiment shown in FIGS. 7 and 8 is a receiver called a dual bander, and the two variable frequency oscillators 4A and 4B are connected to the oscillator 144 as shown in FIG.
It operates to set operating frequencies within two different ham bands, the MH2 band and the 430MH2 band. Then, scan frequency widths are set in different bands by the manual means 7 by the scan frequency width setting means 8. Further, data corresponding to the scan frequency widths of the two bands set by the scan frequency width setting means 8 is given to the scan; νj control means 6. Therefore, the scan control F stage 6
Depending on this data, one operating frequency as shown in Figure 8 or the 144 MHz ham band of 144 MHz is selected.
Outputs a signal to control one variable frequency oscillator 4A to scan in the range from H, . to 146MH7,
The other operating frequency is a ham band in the 430 MHz band, and outputs a signal that controls the other variable frequency oscillator 4B to scan in the range from 430 MHz to 440 Mf (Z).

Then, when the start operation switch 9 is operated to close,
First, check that the scan frequency width is set in the band to be scanned by one of the variable frequency excavators 4A (Step 7 in Figure 7). If the scan frequency width is not set, scan frequency width setting means 8 Read and set the scan frequency width of the band to be scanned from (Step 2 in Figure 7). Next, make sure that the scan frequency width is set in the band to be scanned by the other variable frequency oscillator 4B (step ① in Figure 7). If the scan frequency width is not set, read and set it appropriately ( Figure 7 Step ■). Furthermore, two variable frequency excavators 4A and 4B are set to 14 at the same time, respectively.
Scanning is performed in the 4MH2 band and 430MH2 band (steps ■ and ■ in Figure 7). The scanning operation is repeated until the detection signal is output from the squelch circuit 5A or 5B, and when the detection signal is output (seventh
Figure step ■ or ■), the scanning operation is stopped,
A signal on that operating frequency is received.

In such a configuration, two different ham bands are simultaneously scanned by two frequency conversion means, so that two
You can quickly scan and search for the presence or absence of signals across two ham bands.

Furthermore, a fourth embodiment of the receiver scanning device of the present invention will be described with reference to FIG. FIG. 9 is a diagram illustrating the scanning operation of two variable frequency oscillators in the fourth embodiment of the receiver scanning device of the present invention.

A fourth embodiment of the receiver scanning device of the present invention, which will be explained in FIG. Multiple memory channels can be preset for each of the Hz band and 430MH2 band.And,
144MHz band memory channel chiNchn and 430MH,! Obi memory channel ch (n+1)
~ chm, memory channel groups are set by dividing them by band, one operating frequency is a memory channel group of 144 MH2 band, and the other operating frequency is 430 MH2 band.
A group of MHz memory channels are simultaneously scanned.

Even with this configuration, the 144 MHz band and 430 MHz band
The presence or absence of a signal can be quickly searched for by scanning across multiple memory channels preset to two different H24I ham bands.

Further, a fifth embodiment of the receiver scanning device of the present invention will be described with reference to FIGS. 10 and 11.

FIG. 10 is a block circuit diagram of a fifth embodiment of the receiver scanning device of the present invention, and FIG. 11 is a flowchart illustrating an example of the operation of the receiver scanning device shown in FIG. 1O. be. In FIG. 10, circuit blocks that are the same as those in FIG. 1 are given the same reference numerals and redundant explanations will be omitted.

In Fig. 1θ, two variable frequency oscillators 4A, 4B
Both operate to set operating frequencies within the same band. Then, the input means 7 appropriately divides the frequency within the same band, and the scan frequency width setting means 8 sets two different scan frequency widths. Furthermore, data corresponding to the two scan frequency widths set by the scan frequency width setting means 8 is given to the scan control means 13. Therefore, according to this data, the scan control means 13 outputs a signal to control one variable frequency oscillator 4A so that one operating frequency scans in a predetermined frequency width, and outputs a signal to control the other variable frequency oscillator 4A in the other predetermined frequency width. A signal is output to control the other variable frequency oscillator 4B so that the operating frequency is scanned. Further, signals given from the stiff scan control means 13 to the variable frequency oscillators 4A and 4B are given to the storage means 14, respectively. Then, by closing the start operation switch 9, the scan control means 13 simultaneously scans the two variable frequency oscillators 4A and 4B, and when the detection signals output from the squelch circuits 5A and 5B are given to the storage means 14, Signals from the scan control means 13 are sequentially stored in the storage means 14. Furthermore, when the scanning operation continues and the storage capacity of this storage means becomes full, a stop signal is output from the storage means 14 to stop the scanning operation of the variable frequency oscillators 4A and 4B by the scan control means I3. Further, each time the readout switch 15 is closed, the signals stored in the storage means 14 are sequentially read out to the scan control means 13, and the variable frequency excavator 4A or 4B is controlled, and reception 5 is performed sequentially at operating frequencies that are above a predetermined level.

Next, the operation of the Suncan IIJ control means 13 will be explained based on FIG. 11. Figure 11 Step ■ or ■ is the third
This is the same as steps ■ to ■ in the figure. Then, when the detection signal is output from the squelch circuit 5A or 5B in step ■ or ■ in FIG. (Step ■ or @l in Figure 11). Furthermore, it is determined whether the storage capacity of the storage means 14 is full or not (steps ■ and ■ in Figure IT). If the storage capacity is not full, the process returns to step ■ or ■ in Figure 11 and the scan operation is continued. , if the storage capacity is full, the scanning operation is stopped.

In the above-described embodiment, when the storage capacity of the storage means 14 becomes full, the scanning operation is stopped.
The operation may be stopped after scanning the tth set scan frequency width once. Further, as the variable frequency excavators 4A and 4B, PLL circuits that can be directly controlled by digital value signals are used, and the digital value signals are stored as they are in the storage means 14. etc., the storage means 14 stores data corresponding to the signals given to the variable frequency oscillators 4A and 4B, such as a digital value of the surface to be converted into a control voltage or a digital value obtained by A/D converting the control voltage. That's fine. Furthermore, the two variable frequency oscillators 4A and 4B may each set their operating frequencies to different ham bands. Further, in place of the scan frequency width setting means 8, a presetting means and a memory channel group setting means may be provided, and the memory channels in which an IF signal of a predetermined level or higher is detected may be stored in the storage means 14.

In such a configuration, scanning time is shortened, and when an IF signal of a predetermined level or higher is detected, the signal corresponding to the operating frequency is stored, so that local stations or rare stations operating in the relevant band can be easily detected. You can quickly search for the presence or absence.

In the previously described embodiment, two sets of frequency conversion means were provided to divide the same band into two, but the invention is not limited to this, and three or more frequency conversion means are provided to divide the same band into three.
The frequency may be divided into two or more. Further, the scan frequency width does not need to be set to scan the entire band, and may be set to scan only a necessary frequency range. Furthermore, in a device that simultaneously scans different ham bands, as in the above embodiment, <1
The combination is not limited to the ham bands of the 44MH2 band and the 430MH2 band, and may also be a combination of three or more ham bands. Then, one operating frequency may be used to scan only a partial range of one band, and the other operating frequency may be used to scan the remaining range of this one band and the other band. Also, the memory channels do not need to be partitioned by ham bands; one partition may be provided across two ham bands. Furthermore, the signal level detection means is not limited to a squelch circuit such as an S meter squelch or a noise squelch, but may have any structure as long as it can detect that the signal is at a predetermined level or higher.

(Effects of the Invention) Since the receiver scanning device of the present invention is configured as described above, it achieves the special effects described below.

In the receiver scanning device according to the first aspect, since the same band is frequency-divided into a plurality of operating frequencies and scanned simultaneously, the scanning time can be shortened.

In the receiver scanning device according to claim 2, a plurality of memory channels in the same band are divided into a plurality of groups and scan operations are performed simultaneously at a plurality of operating frequencies, so that the memory to be scanned at one operating frequency is The number of channels is reduced and the scanning time is accordingly reduced.

In the receiver scanning device according to the third aspect of the present invention, since the scanning operation is performed simultaneously using a plurality of operating frequencies in a plurality of different ham bands, it is possible to quickly search for the presence or absence of a signal across a plurality of ham bands by scanning.

In the receiver scanning device according to the fourth aspect of the present invention, the presence or absence of a signal can be quickly searched for by scanning across a plurality of memory channels preset to a plurality of ham bands.

In the receiver scanning device according to the fifth aspect of the present invention, when a signal of a predetermined level or higher is received by scanning, the scanning operation is stopped, so that the signal of the operating frequency at that time can be quickly received.

In the receiver scanning device according to the sixth aspect of the present invention, since data corresponding to signals of a predetermined level or higher is stored, a signal of a local station or a rare station can be quickly searched for by quick scanning.

[Brief explanation of drawings]

FIG. 1 is a block circuit diagram of one embodiment of a scanning device for a receiver according to the present invention, FIG. 2 is a diagram explaining the scanning operation of the two variable frequency oscillators in FIG.
FIG. 4 is a flowchart illustrating an example of the operation of the receiver scanning device shown in FIG. 1, and FIG. 4 is a block circuit diagram of a second embodiment of the receiver scanning device of the present invention. 5 is a diagram illustrating the scanning operation of the two variable frequency oscillators shown in FIG. 4, and FIG. 6 is a flowchart illustrating an example of the operation of the scanning device of the receiver shown in FIG. FIG. 7 is a flowchart explaining the operation of the third embodiment of the receiver scanning device of the present invention, and FIG. 8 is a diagram explaining the scanning operation of the two variable frequency oscillators in FIG. 9 is a diagram illustrating the scanning operation of two variable frequency oscillators in the fourth embodiment of the receiver scanning device of the present invention, and FIG. FIG. 11 is a flowchart illustrating an example of the operation of the scanning device of the receiver shown in FIG. 1O. 3A, 3B: mixer, 4A, 4B: variable frequency oscillator, 5A, 5B: squelch circuit, 6, 12.13 Niscan control means, 8 Niscan frequency width setting means, 10 nib reset means, 11: memory channel group setting means, ■ 4: Memory means. Patent applicant Satoshi Moriyama, agent of Icom Co., Ltd. Patent attorney Unemployment 2 figures, □1 1260”−〜−−′−１（−′ 1ko00

Claims (6)

[Claims] (1) A plurality of frequency conversion means consisting of a mixer and a variable frequency oscillator for setting a plurality of operating frequencies in the same band, and a scanning frequency width of these frequency conversion means is frequency-divided within the same band. Scanning of a receiver characterized by comprising: a scan frequency width setting means for setting each of the plurality of frequency conversion means, and a scan control means for simultaneously performing a scanning operation of the plurality of frequency conversion means with the scan frequency width set for each one. Device. (2) In the receiver scanning device according to claim 1,
Presetting means for presetting a plurality of memory channels within the same band is provided, memory channel group setting means for dividing the plurality of memory channels into a plurality of groups is provided in place of the scan frequency width setting means, and the scan control A scanning device for a receiver, characterized in that the means causes the plurality of frequency conversion means to simultaneously perform a scanning operation on memory channel groups respectively set. (3) A plurality of frequency conversion means each consisting of a mixer and a variable frequency oscillator for setting a plurality of operating frequencies in different bands, and setting the scan frequency widths of these frequency conversion means in the different bands. scan frequency width setting means; scan control means for simultaneously scanning the plurality of frequency conversion means with the scan frequency widths of the different bands respectively set;
A receiver scanning device comprising: (4) In the receiver scanning device according to claim 3,
A preset means for setting a plurality of memory channels in advance is provided, and instead of the scan frequency width setting means, a memory channel group setting means is provided for dividing the plurality of memory channels into groups for each band, and the scan control means 1. A scanning device for a receiver, characterized in that a plurality of frequency conversion means simultaneously perform a scanning operation on memory channel groups divided into the bands. (5) In the receiver scanning device according to any one of claims 1 to 4, each of the plurality of frequency conversion means includes signal level detection means that outputs a detection signal when the IF signals outputted from the plurality of frequency conversion means are equal to or higher than a predetermined level. 1. A scanning device for a receiver, wherein the scanning control device stops the scanning operation when the detection signal is output from the signal level detection device. (6) In the receiver scanning device according to any one of claims 1 to 4, each of the plurality of frequency conversion means includes signal level detection means that outputs a detection signal when the IF signals outputted from the plurality of frequency conversion means are equal to or higher than a predetermined level. and storage means for storing data corresponding to the signal given to the frequency conversion means in order to set the operating frequency when the detection signal is output from the signal level detection means. receiver scanning device.