JP3009044B2 - Receiver scanning device - Google Patents

Description

Description: FIELD OF THE INVENTION The present invention relates to a scanning device for a receiver capable of performing a scanning operation at a plurality of operating frequencies simultaneously, thereby enabling a quick search with a short scanning time. Things.

(Prior Art) Some conventional receivers can simultaneously receive two different frequencies in the same hum band and the same mode. This receiver is provided with two variable frequency oscillators to set two different operating frequencies. Then, while one signal is received at the operating frequency set using one variable frequency oscillator, a scan operation is performed using the other variable frequency oscillator, so that other signals can be searched. it can.

In a receiver called a dual bander (or a twin bander), two different ham bands can simultaneously receive two different frequencies. The receiver is provided with a variable frequency oscillator corresponding to each band in order to set the operating frequency in each of the two bands. Then, while receiving a signal of one band at an operating frequency set using one variable frequency oscillator, a scan operation is performed in the other band using the other variable frequency oscillator, whereby the other band is scanned. A signal search or the like can be performed.

(Problems to be Solved by the Invention) By the way, in a conventional receiver capable of receiving signals of two different frequencies at the same time in the same hum band and the same mode, the signal is received at the operating frequency by one of the variable frequency oscillators. Regardless of whether or not the scanning is performed, the band is scanned using only the other one variable frequency oscillator. Therefore, for example, a ham band in the 1200 MHz band has a wide bandwidth of 40 MHz, and the time required for the scanning operation to cover the entire bandwidth (scanning time).
Was long. For this reason, a quick search for a signal cannot be performed, and a further reduction in the scanning time has been demanded.

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

The present invention has been made in view of the circumstances of the conventional receiver as described above, and an object of the present invention is to provide a scanning device of a receiver that can perform a quick search by shortening a scanning time.

(Means for Solving the Problems) In order to achieve such an object, a scanning apparatus for a receiver according to the present invention includes a plurality of mixers for setting a plurality of operating frequencies within the same band and a plurality of variable frequency oscillators. Frequency conversion means, scan frequency width setting means for setting the scan frequency widths of these frequency conversion means in the same band by frequency division, and the plurality of frequency conversions with the scan frequency widths set respectively. Scan control means for simultaneously scanning the means. Further, a preset means for presetting a plurality of memory channels in the same band is provided, and in place of the scan frequency width setting means, a memory channel group setting means for dividing the plurality of memory channels into a plurality of groups is provided, The memory controller may be configured to simultaneously scan the memory channels set by the plurality of frequency converters by the scan controller.

Further, the scanning device of the receiver according to the present invention includes a plurality of frequency converting means including a mixer and a variable frequency oscillator for setting a plurality of operating frequencies in different bands, respectively, and a scan frequency width of these frequency converting means. Scan frequency width setting means for setting each of the different bands in the different bands, and scan control means for simultaneously performing the scan operation of the plurality of frequency conversion means with the set scan frequency widths of the different bands. May be. In addition, preset means for presetting a plurality of memory channels is provided, and in place of the scan frequency width setting means, memory channel group setting means for dividing the plurality of memory channels into groups for each band is provided, Accordingly, the plurality of frequency conversion means may be configured to simultaneously scan the memory channel group divided for each band.

And an IF output from the plurality of frequency conversion means.
A signal level detecting means for outputting a detection signal when the signal is equal to or higher than a predetermined level is provided for each, and when the detection signal is output from these signal level detecting means, the scan control means stops the scanning operation. You may comprise.

Further, each of the signal level detection means for outputting a detection signal when the IF signal output from the plurality of frequency conversion means is equal to or higher than a predetermined level is provided, and the detection signal is output from these signal level detection means. Sometimes, a storage means for storing data corresponding to a signal given to the frequency conversion means for setting an operation frequency may be provided.

(Operation) Since a plurality of frequency conversion means for setting a plurality of operating frequencies in the same band are frequency-divided in the same band and simultaneously operated with the set scan frequency width, one band is divided into a plurality of bands. , The frequency width at which the scanning operation is performed by one frequency conversion unit is narrowed, and the scanning time is shortened accordingly. Also, if a plurality of memory channels in the same band are divided into a plurality of groups, and the memory channel groups divided by the plurality of frequency conversion units are scanned simultaneously, the number of memory channels scanned by one frequency conversion unit And the scanning time is shortened accordingly.

Further, if a plurality of frequency conversion means for setting operation frequencies in different bands are simultaneously scanned in different bands, the presence or absence of a signal can be quickly searched for in a plurality of bands.
If a plurality of memory channels are divided into groups for each band and the memory channel group is simultaneously scanned by a plurality of frequency conversion means, the presence / absence of a memory channel signal over a plurality of bands can be quickly searched by scanning.

Then, if the scanning operation is stopped by the output of the detection signal, the signal detected by the scanning operation can be received quickly.

Further, if data corresponding to the operating frequency is stored in the storage device based on the output of the detection signal, the signal of the local station or the rare station can be quickly searched by the data.

Embodiment An embodiment of the present invention will be described below 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. FIG. 2 is a diagram for explaining a scanning operation of two variable frequency oscillators in FIG. FIG. 4 is a flowchart for explaining 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, further branched into two, and supplied to two mixers 3A and 3B. These mixers 3A and 3B have variable frequency oscillators 4A and 4B (VFOA, V
FOB) provides a local oscillation signal. And mixer 3
IF signals whose operating frequencies are frequency-converted from A and 3B are squelch circuits 5A and 5B (SQL
A, SQLB). These squelch circuits 5A, 5B
May be either an S-meter squelch or a noise squelch, has a so-called squelch function, and outputs a detection signal to the scan control means 6 when the IF signal is equal to or higher than a predetermined level. The squelch circuit 5
The IF signal outputs of A and 5B are provided to the subsequent-stage AF circuit or the next-stage intermediate frequency converter. The mixers 3A and 3B and the variable frequency oscillators 4A and 4B form two sets of frequency conversion means.

Here, the two variable frequency oscillators 4A and 4B both operate to set the operating frequency within the same band. Then, the same band is appropriately frequency-divided by the input means 7 by button operation or the like, and two different scan frequency widths are set by the scan frequency width setting means 8. Further, data corresponding to the two scan frequency widths set by the scan frequency width setting means 8 is provided to the scan control means 6. Accordingly, the scan control means 6 controls one of the variable frequency oscillators 4A according to this data so that one operating frequency rises in the range of 1260 MHz to 1280 MHz and scans, as shown in FIG. 2A, for example. It outputs a signal and outputs a signal for controlling the other variable frequency oscillator 4B so that the other operating frequency falls and scans in the range of 1280 MHz to 1300 MHz. Then, the scan control means 6 simultaneously causes the two variable frequency oscillators 4A and 4B to perform the scanning operation by closing the start operation switch 9. Further, when a detection signal is output from the squelch circuits 5A and 5B and given to the scan control means 6, the scan control means 6 stops the scanning operation of the variable frequency oscillators 4A and 4B and outputs a signal having a predetermined level or more. Receive.

In FIG. 2 (a), the frequency range of the 1200 MHz ham band is divided into halves. However, the present invention is not limited to this, and as shown in FIG. The width may be narrowed and the other scan frequency width may be widened.

Next, the operation of the scan control means 6 will be described with reference to FIG. When the start operation switch 9 is closed, first, it is confirmed that the scan frequency width of one variable frequency oscillator 4A is set (third step),
If the scan frequency width is not set, the scan frequency width setting means 8 instructs to set the scan frequency width obtained by frequency-dividing the band, and reads and sets the set scan frequency width (step in FIG. 3). Next, it is confirmed that the scan frequency width of the other variable frequency oscillator 4B is set (step in FIG. 3), and if not set, the scan frequency width setting means 8 instructs to set the scan frequency width. At the same time, the set scan frequency width is read and set (step in FIG. 3). Furthermore, the variable frequency oscillators 4A and 4A
B is simultaneously scanned with the set scan frequency width (step 5, FIG. 3). This scan operation may be performed by changing both frequencies in the upward direction or in the downward direction within the scan frequency width, and further, changing one of the frequencies in the upward direction and the other in the downward direction. Then, the scanning operation is repeated until the detection signal is output from the squelch circuit 5A or 5B by the scanning operation at the operating frequency. When the detection signal is output (step or in FIG. 3), the scanning operation is stopped and the scanning operation is stopped. Reception is performed at the operating frequency.

In such a configuration, the same band is frequency-divided into two, and the two frequency converters are operated for scanning in their respective ranges. Therefore, the frequency range in which the scanning operation is performed by one frequency converter is narrowed, and the scanning time is shortened accordingly. Be transformed into In particular, if the scan frequency width of one of the frequency conversion means is set within a narrow range in which signal detection is desired quickly as shown in FIG. 2 (b), the scanning time is short and the scan is performed quickly due to the narrow scan frequency width. Is repeated. In addition, when the squelch circuit 5A or 5B detects an IF signal of a predetermined level or more, the scanning operation is stopped, so that the signal can be received quickly and quickly.

The second embodiment of the receiver scanning apparatus according to the present invention
This will be described with reference to FIGS. 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 for explaining the scanning operation of the two variable frequency oscillators of FIG. FIG. 6 is a flowchart for explaining an example of the operation of the scanning device of the receiver shown in FIG. 4, the same circuit blocks as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 4, a plurality of memory channels in the same band are preset by a presetting means 10 having a memory by an input means 7. The data of the plurality of memory channels is given from the presetting means 10 to the memory channel group setting means 11, and the plurality of memory channels are appropriately divided into two groups by the operation of the input means 7 by the memory channel group setting means 11. Is done. And
The data of the memory channel group divided into two is given to the scan control means 12, and the scan control means 12 sets the operating frequencies of the memory channels ch1 to chn based on these data, for example, as shown in FIG. Thus, a signal for controlling one variable frequency oscillator 4A is output, and a signal for controlling the other variable frequency oscillator 4B is set so that the operating frequencies of the memory channels ch (n + 1) to chm are set. And the start operation switch 9
By the closing operation, the scan control means 12 simultaneously causes the two variable frequency oscillators 4A and 4B to perform the scanning operation with the memory channel group, respectively. Here, if an IF signal of a predetermined level or more is obtained, the scanning operation is stopped and reception is performed at the operating frequency.

Next, the operation of the scan control means 12 will be described with reference to FIG. When the start operation switch 9 is closed, first, it is confirmed that the memory channel is appropriately set (step in FIG. 6). If the memory channel is not properly set, the preset is performed by the preset means 10. The user is instructed to do so (FIG. 6 step). Then, it is confirmed that the memory channel group to be scanned by one of the variable frequency oscillators 4A is set (step in FIG. 6). If the memory channel group is not set, the memory channel group setting means is set.
At 11, an instruction is made to set a group, and the set memory channel group is read (step in FIG. 6). Further, it is confirmed that the memory channel group to be scanned by the other variable frequency oscillator 4B is set (step in FIG. 6). If the memory channel group is not set, the group is set by the memory channel division setting means 11. Is set, and the set memory channel group is read (step in FIG. 6). And furthermore,
The variable frequency oscillators 4A and 4B are simultaneously scanned by the memory channel groups set respectively (steps in FIG. 6). The squelch circuit 5A, 5
If the detection signal is not output from B (step in FIG. 6), the scanning operation is continued as it is, and if the detection signal is output (step in FIG. 6), reception is performed at the operating frequency.

In such a configuration, a plurality of memory channels in the same band are divided into two groups, and the two frequency conversion units are operated to scan by the respective memory channel groups. Therefore, the number of memory channels scanned by one frequency conversion unit is reduced. And the scanning time is shortened accordingly.

A third embodiment of the scanning device for a receiver according to the present invention will be described with reference to FIGS. 7 and 8. FIG. FIG.
FIG. 8 is a flowchart for explaining the operation of the third embodiment of the scanning device of the receiver according to the present invention.
FIG. 4 is a diagram for explaining a scan operation of two variable frequency oscillators. The block circuit diagram is the same as FIG.

The third embodiment shown in FIGS. 7 and 8 is a receiver called a dual bander, in which two variable frequency oscillators 4A and 4B are, for example, as shown in FIG. It operates to set the operating frequency in two different ham bands of the band. Then, the scan frequency width is set in a different band by the input 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 provided to the scan control means 6. Accordingly, the scan control means 6 controls one of the variable frequency oscillators 4A according to the data so that one operating frequency scans in a range from 144 MHz to 146 MHz, which is a hum band of a 144 MHz band as shown in FIG. 430M that outputs a signal and the other operating frequency is a 430MHz ham band
A signal for controlling the other variable frequency oscillator 4B so as to scan in the range from Hz to 440 MHz is output.

Then, when the start operation switch 9 is closed, it is first confirmed that the scan frequency width is set in the band to be scanned by one of the variable frequency oscillators 4A (step in FIG. 7). If is not set, the scan frequency width of the band to be scanned is read from the scan frequency width setting means 8 and set (step in FIG. 7). Next, it is confirmed that the scan frequency width is set in the band to be scanned by the other variable frequency oscillator 4B (step in FIG. 7). If the scan frequency width is not set, it is read and set appropriately (see FIG. 7). (FIG. 7 step). Further, the two variable frequency oscillators 4A and 4B are simultaneously scanned in the respectively set 144 MHz band and 430 MHz band (FIG. 7, step,
). The scanning operation is repeated until the detection signal is output from the squelch circuit 5A or 5B in this scanning operation, and when the detection signal is output (step or in FIG. 7),
The scanning operation is stopped, and the signal of the operating frequency is received.

In such a configuration, two different ham bands are scanned simultaneously by the two frequency conversion means,
You can quickly search for the presence or absence of a signal across two hum bands by scanning.

Further, a fourth embodiment of the scanning device of the receiver according to the present invention will be described with reference to FIG. FIG. 9 is a view for explaining the scanning operation of two variable frequency oscillators in the fourth embodiment of the scanning device of the receiver of the present invention.

A fourth embodiment of the scanning device of the receiver of the present invention to be described with reference to FIG. 9 is a receiver called a dual bander, which has two different hum bands, for example, a 144 MHz band as shown in FIG. You can preset multiple memory channels for each of the 430MHz and 430MHz bands. A memory channel group is set by dividing the memory channels into bands, such as memory channels ch1 to chn of the 144 MHz band and memory channels ch (n + 1) to chm of the 430 MHz band.
The memory channel group of the 144 MHz band and the memory channel group of the other operating frequency of 430 MHz are simultaneously scanned.

Even in such a configuration, the presence or absence of a signal can be quickly searched by scanning over a plurality of memory channels preset in two different ham bands of the 144 MHz band and the 430 MHz band.

Further, the fifth embodiment of the receiver scanning apparatus of the present invention.
Will be described with reference to FIGS. 10 and 11. FIG. No.
FIG. 10 is a block circuit diagram of a fifth embodiment of the receiver scanning apparatus of the present invention, and FIG. 11 is a flowchart illustrating an example of the operation of the receiver scanning apparatus shown in FIG. . 10, the same circuit blocks as those in FIG. 1 are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 10, both variable frequency oscillators 4A and 4B operate to set the operating frequency in the same band. Then, the input means 7 appropriately divides the frequency of the same band and sets two different scan frequency widths by the scan frequency width setting means 8. Further, data corresponding to the two scan frequency widths set by the scan frequency width setting means 8 is supplied to the scan control means 13. Therefore, the scan control means 13 outputs a signal for controlling one variable frequency oscillator 4A so that one operating frequency scans at a predetermined frequency width according to this data, and outputs the other at a predetermined frequency width. It outputs a signal for controlling the other variable frequency oscillator 4B so that the operating frequency scans. Also, signals given from these scan control means 13 to the variable frequency oscillators 4A and 4B are stored in the storage means 14
Respectively. Then, when the start operation switch 9 is closed, the scan control means 13 simultaneously performs the scan operation of 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, The signal from the scan control means 13 is stored in the storage means 14
Are sequentially stored. Further, when the scan operation is continued and the storage capacity of the storage means 14 becomes full, a stop signal for stopping the scan operation of the variable frequency oscillators 4A and 4B by the scan control means 13 is output from the storage means 14. Further, every time the readout switch 15 is closed, the signal stored in the storage means 14 is sequentially transmitted to the scan control means 13.
And the variable frequency oscillator 4A or 4B is controlled so that the operation frequency is set by the signal, and the reception is sequentially performed at the operation frequency at or above the predetermined level.

Next, the operation of the scan control means 13 will be described with reference to FIG. It is the same as the steps in FIG. 11 or the steps in FIG. Then, when the detection signal is output from the squelch circuit 5A or 5B in the step of FIG. 11, the signal given to the variable frequency oscillator 4A or 4B in order to set the operating frequency at that time is stored in the storage means 14.
(Step or in FIG. 11). further,
It is determined whether or not the storage capacity of the storage means 14 is full (step in FIG. 11), and if the storage capacity is not full, the process returns to step or in FIG. 11 to continue the scanning operation.
If the storage capacity is full, the scanning operation is stopped.

In the above-described embodiment, the scanning operation is stopped when the storage capacity of the storage unit 14 is full.
The operation may be stopped once the preset scan frequency width is scanned. Further, as the variable frequency oscillators 4A and 4B, PLL circuits that can be directly controlled by digital value signals are used, and the digital value signals are stored in the storage means 14 as they are.
If an L circuit or the like is used, data corresponding to a signal given to the variable frequency oscillators 4A and 4B, such as a digital value before being converted to a control voltage or a digital value obtained by A / D converting the control voltage, is stored in the storage means 14. Just remember. Further, the two variable frequency oscillators 4A and 4B may set operating frequencies to different ham bands. Further, a preset means and a memory channel group setting means may be provided in place of the scan frequency width setting means 8, and a memory channel in which an IF signal of a predetermined level or more is detected may be stored in the storage means 14.

In such a configuration, the scanning time is shortened, and when an IF signal of a predetermined level or higher is detected, a signal corresponding to the operating frequency is stored, so that a local station or a rare station operating in the band is used. The presence can be searched quickly.

In the above-described embodiment, two sets of frequency conversion means are provided to divide the same band into two. However, the present invention is not limited to this. Three or more frequency conversion means are provided, and three or more frequency conversion means are provided in the same band. It may be divided. Further, the scan frequency width does not need to be set so as to scan the entire band, and may be such that only the necessary frequency range is scanned. Further, in an apparatus for simultaneously scanning different ham bands, as in the above-described embodiment,
It is not limited to a combination of the 144 MHz band and the 430 MHz band, and may be a combination of three or more ham bands.
Then, only the partial range of one band may be scanned at one operating frequency, and the remaining range of the one band and the other band may be scanned at the other operating frequency. Also, the memory channels need not be divided by ham bands, and one division may be provided over two hum bands. Further, the signal level detecting means is not limited to a squelch circuit such as an S meter squelch or a noise squelch, and may have any structure as long as it can detect that a signal is at or above a predetermined level.

(Effects of the Invention) Since the scanning device of the receiver according to the present invention is configured as described above, it has the following special effects.

In the receiver scanning apparatus according to the first aspect, the same band is frequency-divided at a plurality of operating frequencies and the scanning operation is performed simultaneously, so that the scanning time can be reduced.

In the scanning device for a receiver according to claim 2, a plurality of memory channels in the same band are divided into a plurality of groups, and a scanning operation is simultaneously performed at a plurality of operating frequencies. The number of channels is reduced and the scanning time is correspondingly shorter.

According to the third aspect of the present invention, since the scanning operation is simultaneously performed with a plurality of operating frequencies in a plurality of different hum bands, the presence or absence of a signal can be quickly searched for in a plurality of hum bands.

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

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

In the scanning device of the receiver according to claim 6, since data corresponding to a signal of a predetermined level or more is stored,
The quick scan allows you to quickly search for signals from local and rare stations.

[Brief description of the drawings]

FIG. 1 is a block circuit diagram of an embodiment of a scanning device for a receiver according to the present invention. FIG. 2 is a diagram for explaining a scanning operation of two variable frequency oscillators in FIG.
FIG. 4 is a flowchart illustrating an example of the operation of the scanning device of the receiver shown in FIG. 1. FIG. 4 is a block circuit diagram of a second embodiment of the scanning device of the receiver of the present invention. FIG. 5 is a diagram for explaining the scanning operation of the two variable frequency oscillators of FIG. 4, and FIG. 6 is a flowchart for explaining an example of the operation of the scanning device of the receiver shown in FIG. FIG. 7 is a flowchart for explaining the operation of the third embodiment of the scanning device of the receiver according to the present invention, and FIG. 8 is a diagram for explaining the scanning operation of the two variable frequency oscillators of FIG. FIG. 9 is a diagram for explaining a scanning operation of two variable frequency oscillators in the fourth embodiment of the scanning device of the receiver of the present invention.
FIG. 10 is a block circuit diagram of a fifth embodiment of the receiver scanning apparatus of the present invention, and FIG. 11 is a flowchart illustrating an example of the operation of the receiver scanning apparatus shown in FIG. . 3A, 3B: mixer, 4A, 4B: variable frequency oscillator, 5A, 5B: squelch circuit, 6, 12, 13: scan control means, 8: scan frequency width setting means, 10: preset means, 11: memory channel group setting Means, 14: storage means.

Claims (6)

(57) [Claims] 1. A plurality of frequency converting means comprising a mixer and a variable frequency oscillator for setting a plurality of operating frequencies within the same band, and a scan frequency width of these frequency converting means is divided by dividing the frequency within the same band. And a scan frequency width setting means for setting each of the frequency conversion means, and a scan control means for simultaneously scanning the plurality of frequency conversion means with the set scan frequency width. Scanning device. 2. A scanning device for a receiver according to claim 1, further comprising: presetting means for presetting a plurality of memory channels in the same band, wherein said plurality of memory channels are set in place of said scan frequency width setting means. A scanning device for a receiver, comprising: memory channel group setting means for dividing into a plurality of groups, wherein the scan control means simultaneously scans the memory channel groups respectively set by the plurality of frequency conversion means. 3. A plurality of frequency converting means comprising a mixer and a variable frequency oscillator for setting a plurality of operating frequencies in different bands, respectively, and a scan frequency width of these frequency converting means is set in each of the different bands. Scanning frequency width setting means for setting, and a scan control means for simultaneously performing the scanning operation of the plurality of frequency conversion means with the scan frequency width of the different band set respectively, the receiver of the receiver characterized by comprising Scan device. 4. A scanning apparatus for a receiver according to claim 3, further comprising presetting means for presetting a plurality of memory channels, wherein said plurality of memory channels are grouped for each band in place of said scanning frequency width setting means. A memory channel group setting means for dividing the memory channel group which is divided for each band by the plurality of frequency conversion means by the scan control means at the same time. . 5. A signal scanning means for a receiver according to claim 1, wherein said IF signal output from said plurality of frequency conversion means outputs a detection signal when the IF signal is higher than a predetermined level. And the scanning control unit stops the scanning operation when the detection signal is output from the signal level detecting unit. 6. A signal scanning means for a receiver according to claim 1, wherein said IF signal output from said plurality of frequency conversion means is a predetermined level or more, and said signal level detection means outputs a detection signal. And a storage unit for storing data corresponding to a signal given to the frequency conversion unit to set an operating frequency when the detection signal is output from the signal level detection unit. Scanning device for receivers.