JP3070655U - Preset device - Google Patents

Abstract

(57) [Problem] To provide a preset device in which a preset time is greatly reduced and a complicated operation for deleting a channel preset by an erroneous search is not required. SOLUTION: Data of each channel of television broadcasting and CATV broadcasting for each channel plan determined according to a communication area is stored in a first memory 13 in advance, and the channel of each broadcasting can be searched and received. A preset memory for reading data corresponding to a specific channel from the first memory 13 and storing the data in the second memory for presetting.
When at least one channel is searched for in the lower channel of, the channel in which the adjacent frequency band indicating CATV broadcasting is approximated is not searched, and in the higher channel indicating UHF, the required number is searched to find the pitch of the frequency of the receiving channel. The control means 12 determines which channel plan corresponds to the channel plan, and thereafter performs control for searching for a channel of the corresponding channel plan.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a preset device having a preset tuner, and more particularly, to a preset device capable of searching for a television broadcast and a CATV broadcast in accordance with respective channel plans and automatically presetting a reception channel.

[0002]

[Prior art]

 When presetting the receiving channel of television broadcasting and CATV broadcasting, it is possible to perform automatic presetting by eliminating the complicated problem that the user has to judge which broadcasting is to be performed and to perform the switching operation at the receiver. Known receivers are known. This type of receiver has a problem that even if it is not possible to receive a CATV broadcast in a continuous adjacent channel, the receiver determines that the CATV broadcast is a CATV broadcast and incorrectly sets the TV broadcast. Therefore, the present inventors have proposed a receiver capable of reliably presetting each channel of CATV broadcast or television broadcast (see Japanese Utility Model Publication No. 3060430).

[0003] The receiver includes a judging means for judging whether or not a broadcast signal is continuously received on two or more channels, and one of the television broadcasting and the CATV broadcasting according to the judgment result by the judging means. Preset means for presetting the receiving channel according to the plan. As a result, when adjacent channels are sequentially set, if a broadcast signal can be received in two or more consecutive channels, a value of “2” or more is counted in the counter. For this reason, the CATV reception channels are preset according to the CATV broadcast channel plan. In the case of television broadcasting, since the counter does not count a value of "2" or more, the preset means presets each received channel in accordance with the television broadcasting channel plan.

[0004]

[Issues to be solved by the invention]

 By the way, the receiver having the above-mentioned conventional preset tuner can surely preset the channel of the CATV broadcast when the reception signal can be continuously detected in the adjacent channel, but it searches sequentially from the lower channel to the higher order. The search time was long. Therefore, there is a problem that the user has to wait for a long time until the end of the preset. In addition, depending on the receiving area, the frequency band of the harmonics may be erroneously searched and preset, and this channel must be deleted later, so that the user is forced to perform complicated operations later. .

The present invention has been made in view of the above problems, and provides a preset device in which the preset time is greatly reduced, and a complicated operation for deleting a channel preset by an erroneous search is not required. The purpose is.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, in the present invention, the invention according to claim 1 stores the data of each channel of the television broadcast and the CATV broadcast for each channel plan determined according to the receiving area in the first memory in advance. A preset device which is stored, searches for a channel of each broadcast, reads out data corresponding to a receivable channel from the first memory, and stores it in a second preset memory. If at least one channel is searched in the lower channel of VHF after the start, the channel in which the adjacent frequency band indicating CATV broadcast is approximated is not searched, and the required number is searched in the higher channel indicating UHF. It is determined which channel plan corresponds to the pitch of the frequency of the receiving channel. It is characterized by comprising a control means for performing control to search for channels corresponding to the channel plan. According to the invention of claim 2, data of each channel of television broadcasting and CATV broadcasting for each channel plan determined according to the receiving area is stored in the first memory in advance, and A preset device for searching for a channel corresponding to a receivable channel, reading data corresponding to a receivable channel from the first memory, and storing the data in a second preset memory, wherein a frequency of the channel is not affected by harmonics. It is characterized by comprising control means for starting a search from a channel of a band and performing control to sequentially search from a lower channel of the CATV broadcast when any channel is received.

[0007]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the illustrated examples. FIG. 1 is a block diagram showing an electrical configuration of the preset device according to the present invention. This preset device is installed in a television receiver (receiver) used in a wide area, and is configured to automatically preset receivable channels in the installation area based on a plurality of channel plans. In FIG. 1, reference numeral 1 denotes an antenna of a receiver, which is connected to an input terminal 4 via a distributor 2 and a CATV terminal 3. A tuner 5 is connected to the input terminal 4. Thus, when a television broadcast signal or a CATV broadcast signal is introduced into the input terminal 12, the tuner 5 converts the signal into an intermediate frequency signal and sends it to the IF amplifier 6. Since the intermediate frequency signal from the IF amplifier 6 is supplied to the detector 7, a television signal is output from the detector 7 to the synchronization detection circuit 8. When detecting the synchronization signal included in the television signal, the synchronization detection circuit 8 sends the detection signal to the CPU 12.

[0008] The CPU 12 constitutes a microcomputer or a microprocessor together with the ROM 13 and the RAM 14, and controls the operation of the entire receiver. As shown in FIGS. 13 and 14, the ROM 13 stores channel plans for television broadcasting and CATV broadcasting around the world. The RAM 14 stores data of the selected channel. When the CPU 12 receives the supply of the AFT (Automatic Fine Tuning) voltage from the detector 7, the CPU 12 determines whether or not it is tuned to the corresponding channel of the television broadcast or the CATV broadcast based on the AFT voltage.

The CPU 12 controls the switching circuit 9 and the channel selector 10 based on the detection signal from the synchronization detection circuit 8, the AFT voltage, and information in the ROM 13. The switching circuit 9 switches a channel plan to be selected by the channel selector 10 to a television broadcast or a CATV broadcast. Then, the channel selector 10 converts the control data from the CPU 12 into a tuning signal and sends it to a local oscillation circuit (not shown) of the tuner 5. Further, a keyboard 11 is connected to the CPU 12. The keyboard 11 includes a numeric keypad 11a for inputting a channel number, an up / down key 11b for switching channels and / or volume, and a switching key 11c.

When the user operates the switch key 11c when watching a CATV broadcast, for example, the CPU 12 receives the operation signal and switches the switch circuit 9 to the CATV broadcast side. When the user operates the numeric keypad 11a to input a channel number, the CPU 12 provides the frequency data of the channel number to the channel selector 10. The channel selector 10 applies a frequency control signal corresponding to the frequency data to the tuner 5. This allows the user to view the desired CATV broadcast channel.

Next, the operation of the preset device will be described with reference to the flowcharts of FIGS. When the user turns on the power after setting the receiver, the CPU 12 executes the automatic preset operation. Since the receiver previously stores channel plan data as shown in the tables of FIGS. 13 and 14 in the ROM 13, the receiver searches from the VHF which is a lower channel of the channel plan, that is, selects (selects) a channel. Start. First, the CPU 12 switches the switching circuit 9 to VHF, and outputs the lowest frequency data of the 1A channel in Indonesia (Indonesia) to the channel selector 10 (step S1). In response, the channel selector 10 outputs a frequency control signal (tuning signal) for the VHF-1A channel. This tunes tuner 5 to VHF.

The CPU 12 initializes a variable register (not shown) formed in an appropriate area of the RAM 14 and sets a variable N = 1 relating to the number of received broadcast signals (step S2). Subsequently, the CPU 12 determines whether or not there is an Indonesian 1A channel (step S3). If there is a 1A channel, the value of the variable register is incremented, that is, the variable N = N + 1, and the data of the 1A channel is stored in the RAM 14 (steps S4 and S5). Proceed to step S6. On the other hand, if there is no 1A channel, one channel of New Zealand N (New Zealand), which is the next higher frequency, is selected (step S6), and it is determined whether or not this one channel is present (step S7). Here, if there is one channel, the value of the variable register is incremented, the variable N = N + 1 is set by substituting the variable, and the data of this one channel is stored (steps S8 and S9). Proceed to.

If this one channel does not exist, the variable register is checked to determine whether or not the variable N = 0 (step S10). If the variable N = 0 is YES, it means that one channel could not be received. That is, the process proceeds to step S12. If the variable N = 0 is NO, the value of the variable register is decremented, and the variable N = N-1 is set by variable substitution (step S11). Then, channel 0 of Australia A (Australia) having the next highest frequency is selected (step S12), and it is determined whether or not the channel 0 exists (step S13).

If there is a 0-channel, a variable N = N + 1 is set by substituting a variable, the data of the 0-channel is stored (steps S14 and S15), and the process proceeds to the next step S18. On the other hand, if there is no channel 0, it is determined whether or not the variable N = 0 (step S16). If YES, the process proceeds to step S18. If NO, the variable N in the variable register is decremented. After setting N-1 (step S17), the second channel of the European E (Europe) television broadcasting station with the highest frequency is selected (step S18). Thereafter, the channel A of Italy I (Italy) having the next highest frequency is selected in step S19, and the channel selection is continued up to the 5A channel in Australia in step S28 (see FIGS. 2 to 3).

[0015] When the channel selection of the 5A channel is completed, it is determined whether or not any of the Australian channels 0 to 5A is present (step S29). If there is a channel, the process proceeds to step S30, and the VHF channel selection operation in Australia is continued. On the other hand, if there is no Australian channel, it is determined whether any of the Italian channels A to C exists (step S31). At this time, if there is a channel, the process proceeds to step S32, and the channel selection operation of the high-order channel in the Italian VHF is continued. On the other hand, if there is no Italian channel, the VHF channel selection is continued (step S33).

Subsequently, after shifting to channel selection of CATV broadcasting (step S34), the process shifts to channel selection of UHF (step S35). Then, after these are executed, the channel selection operation and the preset are completed. In this way, during the period from the start of channel selection to channel 5A, if there is an Australian channel, this channel is continued. If not, it is determined whether or not there is an Italian channel. This will allow for the early stages of presetting television broadcasts in Australia, Italy or elsewhere.

FIGS. 4 and 5 are flowcharts showing the preset operation in the continuation of the channel selection of the VHF channel following the embodiment of FIGS. In this VHF channel selection continuation (step S30), first, the CPU 12 selects the A6 channel in Australia and determines whether or not this channel is present (steps S101 and S102). If there is an A6 channel, a variable N = N + 1 is set, the data of this channel is stored (steps S103 and S104), and the process proceeds to the next step S104. On the other hand, if the A6 channel does not exist, the next higher frequency A7 channel is selected (step S105), and it is determined whether or not this channel is present (step S106).

If there is an A7 channel, a variable N = N + 1 is set, the data of this channel is stored (steps S107 and S108), and the process proceeds to the next step S111. On the other hand, if the A7 channel does not exist, it is determined whether or not the variable N = 0 (step S109). If YES, the process proceeds to step S111. If NO, the variable N = N-1 is set (step S110), and the next higher frequency A8 channel is selected (step S111). Thereafter, the higher frequencies are continuously selected (steps S112, S113, S114). When the A12 channel is selected as shown in FIG. 5 (step S115), it is determined whether or not this channel is present (step S115). Step S116). If there is an A12 channel, a variable N = N + 1 is set, the data of this channel is stored (steps S117, S118), and the process proceeds to the next step S121.

On the other hand, if the A12 channel does not exist, it is determined whether or not the variable N = 0 (step S119), and if YES, the process proceeds to step S121. If NO, the variable N = N-1 is set (step S120), and it is determined whether there are two or more continuous channels among the A6 to A12 channels in Australia (step S121). If there is a continuous channel, the flow advances to step S122 to shift to channel selection for CATV broadcasting. On the other hand, if there is no Australian channel, the process shifts to UHF channel selection (step S123). Then, after these are executed, the channel selection operation and the preset are completed. As described above, when the tuning in Australia is continued, since the frequency band after the A6 channel is set to the interval of 7 MHz, the tuning in Australia is determined by determining whether or not there are two or more continuous channels. Can be done accurately. If there is a continuous channel, the channel of the CATV broadcast is selected, and if there is no continuous channel, the channel of the UHF broadcast is selected. Therefore, the presetting of the Australian channel is quickly performed.

FIGS. 6 and 7 are flowcharts showing the preset operation of the VHF high-order channel following the embodiment of FIGS. In this VHF high channel selection operation (step S32), first, the CPU 12 selects the Italian D channel (step S201), and extracts "current channel + 1" from the memory table (step S202). Then, it is determined whether or not this D channel exists (step S203). Here, if there is a D channel, a variable N = N + 1 is set, the data of this channel is stored (steps S204, S205), and the process proceeds to the next step S206. On the other hand, if there is no D channel, the Italian E channel is selected (step S206), and it is determined whether or not this channel is present (step S207).

If there is an E channel, a variable N = N + 1 is set, the data of this channel is stored (steps S208, S209), and the process proceeds to the next step S212. On the other hand, if there is no E channel, it is determined whether or not the variable N = 0 (step S210). If YES, the process proceeds to step S212. If NO, the variable N = N-1 is set (step S211), and the next higher frequency Italian F channel is selected (step S212). Thereafter, as shown in FIG. 7, the higher frequencies are continuously selected (steps S213, S214, S215), and when the Italian H2 channel is selected (step S216), it is determined whether or not this channel is present. (Step S217). Here, if there is an H2 channel, the variable N = N + 1 is set, the data of this channel is stored (steps S218, S219), and the process proceeds to the next step S222.

On the other hand, if the H2 channel does not exist, it is determined whether or not the variable N = 0 (step S221). If YES, the process proceeds to step S222. If NO, the variable N = N−1 is set. From (step S221), it is determined whether or not there is a continuous channel equal to or greater than the Italian D to H2 channels (step S222). If there is a channel, the flow advances to step S223 to shift to CATV broadcast channel selection. On the other hand, if there is no Italian channel, the flow shifts to UHF channel selection (step S224). Then, after these are executed, the channel selection operation and the preset are completed. In this way, when selecting the higher channel in Italy, the lower channels are A, B, and C, which are easy to distinguish from other regions, and at least two channels after the higher channels D to H2. By judging whether or not there is a continuous channel of, it is possible to accurately select an Italian channel. When there is a continuous channel, the channel of the CATV broadcast is selected, and when there is no continuous channel, the channel of the UHF broadcast is selected. Therefore, the preset of the Italian channel is quickly performed.

FIGS. 8 and 9 are flowcharts showing the preset operation in the continuation of the channel selection of the VHF channel following the embodiment of FIGS. In this VHF high channel selection operation (step S33), first, the CPU 12 selects five European channels (step S301), and determines whether or not this channel exists (step S302). If there are five channels, the variable N = N + 1 is set, the data of this channel is stored (steps S304, S305), and the flow advances to the next step S307. On the other hand, if there are no five channels, it is determined whether or not the variable N = 0 (step S305). If YES, the process proceeds to step S307. If NO, the variable N = N-1 is set (step S306). ).

Then, the next highest frequency channel in Europe is selected, and it is determined whether or not this channel exists (steps S307 and S308). Here, if there are six channels, the variable N = N + 1 is set, the data of this channel is stored (steps S309, S310), and the process proceeds to the next step S313. On the other hand, if these six channels do not exist, it is determined whether or not the variable N = 0 (step S311). If YES, the process proceeds to step S313. If NO, the variable N = N-1 is set (step S313). Step S312). Then, it selects the E channel in Italy, which is the next highest frequency, and determines whether or not this channel is present (steps S313 and S314). Here, if there is an E channel, the variable N = N + 1 is set, the data of this channel is stored (steps S315, S316), and the process proceeds to the next step S319.

On the other hand, if there is no E channel, it is determined whether or not the variable N = 0 (step S 317). If YES, the process proceeds to step S 319. If NO, the variable N = N−1 is set. (Step S318). Then, the next highest frequency channel of Europe is selected (step S319). Thereafter, as shown in FIG. 9, the higher frequencies are sequentially selected (steps S320 to S326). After the end of step S326, it is determined whether any of the Italian E to G channels is present. Is determined (step S327).

Here, if there is a channel, it is determined whether there is continuity of two or more channels among the D to H2 channels in Italy (step S328). If there are two or more channels, the flow advances to step S329 to shift to CATV broadcast channel selection. If there are no more than two channels, the operation shifts to the selection of the UHF channel of the television broadcast (step S330). After these are executed, the channel selection operation and the preset are completed. In this way, if there is an Italian channel between the start of channel selection of 5 European channels and 12 channels, it is determined whether or not there are two or more consecutive higher-order channels. Since the process shifts to the next channel selection, the preset of the CATV broadcast becomes quick.

FIG. 10 is a flowchart showing a preset operation in channel selection of CATV broadcast following the embodiment of FIGS. In the channel selection operation of the CATV broadcast (step S34), first, after the CPU 12 determines that the channel is the CATV by switching (step S401), the S11 channel is selected first among the European CATV broadcasts (step S401). Step S402). As described above, the channel selection is started from S11 instead of the S1 channel because an erroneous preset of a frequency band in which spurious (high harmonic) twice or three times that of the E2 to E3 channels in the European CATV broadcast easily appears. This is to avoid. After the start of channel selection, the CPU 12 initializes variables in variable registers formed in an appropriate area of the RAM 14, and sets a variable N = 1 (step S403). Then, it is determined whether or not the S11 channel of the CATV broadcast is present (step S404).

If there is an S11 channel, a variable N = N + 1 is set, data of this channel is stored (steps S405 and S406), and the process proceeds to the next step S407. On the other hand, if this channel does not exist, the next higher frequency S12 channel is selected, and it is determined whether or not this channel is present (steps S407 and S408). Here, if there is an S12 channel, a variable N = N + 1 is set, the data of this channel is stored (steps S409 and S410), and the process proceeds to the next step S413. On the other hand, if there is no S12 channel, it is determined whether or not the variable N = 0 (step S411). If YES, the process proceeds to step S413. If NO, the variable N = N-1 is set (step S412). . Then, channels S13 to S20 of the next highest frequency CATV broadcast are sequentially selected (step S413).

Although not shown in the table of FIG. 13, CATV broadcasting has channels S21 to S41 as HYPER bands, and has a frequency band of 8 MHz. In this way, after selecting the channel up to the S20 channel, it is determined in a step S414 whether or not X (for example, 5) channels stored in the RAM 14 are continuous. Here, if X or more are continuous, the channel plan memory is left as a CATV (step S415), the channel selection of the CATV broadcast is continued (step S416), and the process proceeds to the next step S418. . On the other hand, if the number is not X or more, after the TV plan memory is left because it is not a CATV (step S417), the process shifts to the selection of the UHF channel of the television broadcast (step S418). After these are executed, the channel selection operation and the preset are completed.

As described above, if there are X or more consecutive channels from the start of channel selection of CATV broadcast to channel 20 until the channel selection is continued for 20 channels, channel selection according to the channel plan of CATV broadcast is continued. If the broadcast is not continuous, the UHF channel is selected according to the television broadcast channel plan, so that the CATV broadcast can be preset quickly. In addition, tuning is not started from a frequency band in which spurious influences are likely to occur, and a high-order channel is selected first, so that a preset due to an erroneous search is avoided.

FIGS. 11 and 12 are flowcharts showing a preset operation in channel selection of UHF broadcasting following the embodiment of FIGS. In the channel selection operation of the UHF broadcast (step S35), after the CPU 12 starts channel selection from the 21st channel in Europe (step S501), the channel of the next higher frequency is sequentially selected and the 34th channel in Australia is selected. Channel selection is continued until (steps S502 to S508). Then, when the channel selection of this channel is completed, it is determined whether or not a broadcasting station exists in the channel of the Australian division (step S509). Here, if there is an Australian division, it is determined whether or not there are two or more continuous channels among the 28 to 34 channels (step S510). In this Australian division, the frequency band of UHF broadcasting is 7 MHz, which is different from the 8 MHz band in Europe, so that the continuous channel can be accurately discriminated. Further, it is sufficient to judge that two or more continuous channels are continuous among 5 to 10 channels in the Australian division.

At this time, if there is a continuous channel, the process proceeds to step S 513. If there is no continuous channel, the channels of the Australian division are sequentially tuned from channel 35, and the last 70 channels are tuned (step S 512). Ends a series of operations. On the other hand, if there is no channel in the Australian division in step S509, after selecting channel 34 (step S513), channel selection is continued from channel 35 to channel 40 of the next higher frequency (steps S514 to S514). Then, when the channel selection of this channel is completed, it is determined whether or not there is a broadcasting station in the channel of the Australian division (step S516).

Here, when there are channels in the Australian division, it is determined whether or not there are two or more continuous channels among the 35 to 40 channels (step S 517). At this time, if there is a continuous channel, the process proceeds to step S520. If there is no continuous channel, the channels in the Australian division are sequentially selected from the 41st channel as shown in FIG. 12 (step S518), and the last 70 channels are selected. Thereafter (step S519), a series of operations ends. On the other hand, if there is no channel in the Australia section in step S516, after selecting channel 39 (step S520), channel selection is continued from channel 41 to channel 50 of the next higher frequency (steps S521 to S521). 522).

When the channel selection of this channel is completed, it is determined whether or not a broadcasting station exists in the channel of the Australian division (step S523). Here, if there are channels in the Australian division, it is determined whether or not there are two or more continuous channels among the 41 to 50 channels (step S524). At this time, if there is a continuous channel, the process proceeds to step S527. If there is no continuous channel, the channels of the Australian division are sequentially selected from channel 51, and the last 70 channels are selected (step S526). Exit. On the other hand, if there is no channel in the Australian division in step S523, after selecting channel 48 (step S527), channel selection is continued from channel 51 to channel 59 of the next higher frequency (steps S528 to S528). 529).

Then, when the channel selection of this channel is completed, it is determined whether or not there is a broadcasting station in the channel of the Australian division (step S530). Here, if there is a channel in the Australian division, it is determined whether or not there are two or more continuous channels among the 51 to 59 channels (step S531). At this time, if there is a continuous channel, the process proceeds to step S534. If there is no continuous channel, the channels after the 59th channel are sequentially selected (step S532), and after the last 70 channels are selected (step S533), a series of processes is performed. End the operation.

On the other hand, if there is no channel in the Australian division in step S534, after channel 56 is selected (step S534), channel selection is continued from the next highest frequency channel to channel 69 (step S535). To S536). When the channel selection of the 69 channels is completed, a series of operations is completed. As described above, channel selection is started from channel 21 of UHF broadcasting, channel 34 of the Australian division is selected, then it is determined whether or not UHF broadcasting is present on the channel of the Australian division, and the next channel selection is continued. Therefore, presetting of UHF broadcasting in Australia and Europe is quick.

That is, when several channels are selected in the lower channel of the VHF broadcast after the start of the channel selection, the receiver selects channels S1 to S10 of the CATV broadcast in which the band of the adjacent frequency is similar. Do not bureau. In UHF broadcasting of high-order channels, a small number of stations are selected, and a preset is performed by judging which channel plan corresponds to the difference between the pitches of the receiving channel frequency of 7 MHz and 8 MHz. Further, in CATV broadcasting, channel selection is started from the S11 channel which is a frequency band free from spurious effects, and when any one of the channels is received, the channel is sequentially selected from the lower channel of the CATV broadcasting. Therefore, as described above, it is suitable for automatic presetting of receivers mainly used in Europe, Oceania, and Asia. However, by changing only the data of the channel plan, it is possible to change the broadcasting area or the similarity of the frequency band of the adjacent frequency. Of course, the present invention can be widely applied to a receiver used in a composite channel region having different frequency pitches.

[0038]

[Effect of the invention]

 As described above, according to the invention of claim 1 of the present invention, when the automatic channel search starts, at least one of the lower channels of the VHF is searched, and then the UHF is searched without searching the CATV broadcast. Since only the required number of higher channels are searched for channels in the channel plan of the reception area, the search time is greatly reduced as compared with the conventional case of sequentially searching from the lower channels, There is an effect that the user does not have to wait long until the end of the preset. Further, in the invention according to claim 2, when the automatic search of the channel is started, the search is started from the channel of the frequency band where the harmonic does not affect, and when any channel is received, the lower channel of the CATV broadcast is sequentially started. Searching greatly reduces search time, and eliminates the conventional problem of erroneously searching the harmonic frequency band and erasing preset channels later. is there.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an electrical configuration of a preset device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating the operation of a preset device.

FIG. 3 is a flowchart for explaining the operation of the preset device.

FIG. 4 is a flowchart showing a preset operation in continuation of channel selection of a VHF channel.

FIG. 5 is a flowchart showing the preset operation.

FIG. 6 is a flowchart showing a preset operation of a high-order channel of VHF broadcasting.

FIG. 7 is a flowchart showing the preset operation.

FIG. 8 is a flowchart showing a preset operation in continuation of channel selection of VHF broadcast.

FIG. 9 is a flowchart showing the preset operation.

FIG. 10 is a flowchart showing a preset operation in channel selection of CATV broadcasting.

FIG. 11 is a flowchart showing a preset operation in channel selection of UHF broadcasting.

FIG. 12 is a flowchart showing the preset operation.

FIG. 13 is a chart showing channel plans of VHF broadcast and CATV broadcast.

FIG. 14 is a chart showing a channel plan of UHF broadcasting.

[Explanation of symbols]

 11 control means 13 first memory 14 second memory

Claims (2)

[Utility model registration claims] 1. Data of each channel of television broadcasting and CATV broadcasting for each channel plan determined according to a receiving area is stored in a first memory in advance, and the channel of each broadcasting is searched and received. A preset device for reading data corresponding to a possible channel from the first memory and storing the data in a second preset memory, wherein at least one channel is searched in a lower channel of VHF after starting the search. And CAT
A channel whose adjacent frequency band indicating V broadcast is approximated is not searched, and a required number is searched for a high-order channel indicating UHF to determine which channel plan corresponds to the pitch of the frequency of the receiving channel.
A preset apparatus comprising: control means for performing control for searching for a channel of a corresponding channel plan. 2. The data of each channel of television broadcasting and CATV broadcasting for each channel plan defined according to the receiving area is stored in advance in a first memory, and the channel of each broadcasting is searched for and received. A preset device for reading data corresponding to a possible channel from the first memory and storing the data in a second memory for preset, wherein a search is started from a channel of a frequency band which is not affected by harmonics among the channels. A preset apparatus comprising: a control unit for performing control to sequentially search from a lower channel of the CATV broadcast when a certain channel is received.