JPH0666642B2 - Receiving machine - Google Patents

Description

The present invention relates to a receiver, for example, DBS (direct-broadcast).
It can be applied to a device such as a receiver for displaying an abnormality of a memory and peripheral elements thereof.

B. SUMMARY OF THE INVENTION The present invention displays an abnormality in the receiver by displaying an abnormality when the data read from the memory or the data written in the memory matches the collation data for abnormality detection. It allows them to be recognized promptly and take prompt measures.

C Conventional Technology In DBS broadcasting, one company rents a broadcasting band because receivers scattered over a wide area can directly receive broadcasting waves coming from artificial satellites through small satellite dishes. It is considered to be used as means for transmitting information from the center to each branch via receivers installed in the branches scattered over a wide area. In this case, the user can preset a channel capable of transmitting information by specifying an arbitrary frequency included in the usable broadcast band, and thus by transmitting a plurality of information by using a plurality of channels simultaneously. , The utilization efficiency can be improved.

D Problem to be Solved by the Invention By the way, in order to preset the frequency of each channel, a receiver is prepared in advance with a channel frequency memory having a memory area for storing the frequency of each channel. The frequency assigned to each channel is stored in the channel frequency memory as tuning data (hereinafter referred to as frequency data).
Therefore, at the time of channel selection, the channel can be selected by reading the frequency data of the channel designated by the ten keys from the channel frequency memory.

However, the frequency data read from the memory may be abnormal. For example, this occurs when the memory is destroyed, the power supply voltage supplied to the memory becomes abnormal, or noise is mixed when the frequency data is transferred to or from the memory.

Even if the frequency data is abnormal like this, in the case of general television broadcasting or radio broadcasting, the frequency difference between adjacent channels is set to a predetermined interval, so the frequency data of other channels is used. However, in the case of DBS broadcasting, the frequency of each channel is set at random or at random, so if the frequency data becomes abnormal, the tuning operation can no longer be started,
The receiver goes down. Therefore, in this case, it is desired to promptly notify the user of the abnormality.

In particular, since the broadcasting band is rented for DBS broadcasting, the same information is rarely repeatedly transmitted, and therefore it is desirable to suppress the unreceivable state as short as possible. Therefore, it is desirable to immediately display an abnormality when it occurs and to restore the normality quickly.

The present invention has been made in consideration of the above points, and when an abnormality occurs in the data accessed to the memory, promptly,
It is intended to provide a receiver capable of displaying.

E Means for Solving the Problems In order to solve the above problems, the present invention provides a channel frequency memory 24 having a memory area for storing the frequency of each channel to be received, and a read / write operation of the channel frequency memory 24. In addition to the control, the signal processing circuit 14 having the collation data for abnormality detection and the data read from the channel frequency memory 24 to the signal processing circuit 14 coincides with the collation data, and an abnormality occurs in the channel frequency memory 24. And the display means 22, 23 for displaying that the signal processing circuit 14 has an abnormality when the data written from the signal processing circuit 14 to the channel frequency memory 24 matches the collation data. Is provided and the circuit elements 24 and 14 in which the abnormality has occurred are specified to display the abnormality.

The F action signal processing circuit 14 has collation data for abnormality detection, judges whether or not the data read from the channel frequency memory 24 or the data written in the channel frequency memory 24 matches the collation data, and the display means In 22 and 23, when the data read from the channel frequency memory 24 matches the verification data, it is displayed that an error has occurred in the channel frequency memory 24, and the data to be written to the channel frequency memory 24 is the verification data. When the signal processing circuit 14 indicates that an abnormality has occurred, the circuit element 24 or 14 in which the abnormality has occurred is specified and the abnormality is displayed.

As a result, the user can promptly and surely recognize the occurrence of the abnormality, and can take prompt measures.

G. Embodiment An embodiment in which the present invention is applied to a DBS receiver will be described in detail below with reference to the drawings. In FIG. 1, the broadcast wave received by the antenna 11 is supplied to the information reproducing circuit 13 of the directional wave receiving unit 12, and the information reproducing circuit 13 outputs the channel of the channel corresponding to the channel selection signal S1 given from the channel selection circuit 15. Receive broadcast waves.

The tuning circuit 15 is controlled by a tuning command signal S2 generated in the signal processing circuit 14 having, for example, a microcomputer, and sends a tuning signal S1 corresponding to the tuning command signal S2.

In the signal processing circuit 14, as shown in FIG.
Numeric keypad with "9" key and end key "ENTER"
And a key matrix 21 including an input device 1 having a preset mode designating key "STORE" is connected, and when each key of the key matrix 21 is selectively operated, corresponding data is sent to the signal processing circuit 14 Given to.

In the case of this embodiment, the signal processing circuit 14 executes the preset operation when the data corresponding to the preset mode designation key "STORE" is given. When the end key “ENTER” is operated after the numeric keypad has been operated several times (for example, once or twice) during the channel number presetting, the signal processing circuit 14 connects the non-volatile memory 24 with the 3-bit command line. Command signal CO in addressing mode on L1 to L3
M is supplied, and address data corresponding to the ten-key input is supplied through the data line L5 in synchronization with the transfer clock CLK supplied to the memory 24 through the clock line L4. Thereby, the memory area for storing the frequency data is designated.

Further, when the numeric keypad is operated several times (for example, five times) and then the end key “ENTER” is operated at the time of frequency value presetting, the signal processing circuit 14 sets the command signal COM to the write mode and transfers it. Frequency data is supplied to the memory 24 through the data line L5 in synchronization with the clock.

In the case of this embodiment, the signal processing circuit 14 selects the channel corresponding to the ten-key input when the end key "ENTER" is pressed immediately after the ten-key is pressed several times (for example, once or twice). Judge that the tuning mode has been specified. At this time, the signal processing circuit 14 firstly outputs the command signal CO
M is in the addressing mode, address data corresponding to ten-key input is given to the memory 24 to specify a predetermined memory area, then the command signal COM is set in the reading mode, and the frequency data stored in the memory area is taken out. A tuning command signal S2 based on this data is given to the broadcast wave receiving unit 12 to select a channel.

Further, as described above, when numeric data is keyed in digit by digit using the ten-key pad, the signal processing circuit 14 operates the character generating means 22 based on the data captured digit by digit to set a predetermined digit, for example. Characters corresponding to the input data are displayed on the 5-digit data display 23.

Furthermore, the signal processing circuit 14 has a built-in collation data register 25, stores the collation data in the collation data register 25, and compares the collation data with the frequency data to detect an abnormality in the memory 24 or the signal processing circuit 14 itself. It is designed to detect. Here, as the collation data, the frequency data changes when the memory 24 is destroyed, when the power supply voltage becomes abnormal, or when noise is mixed in the instruction lines L1 to L3, the data line L5, etc. It is possible to use logic levels that are often possible, that is, all "0s" and all "1s".

In the above configuration, the signal processing circuit 14 executes the abnormality detection and abnormality display processing in the tuning mode according to the processing procedure of FIG.

That is, the end key “ENTE
By inputting `` R '', it is determined that the channel selection mode has been designated, the program is started at step SP1, and the program moves to the next step SP2 and the nonvolatile memory 24 corresponding to the channel data input by the numeric keypad is stored. Frequency data is read from the memory area.

After that, the signal processing circuit 14 proceeds to step SP3 and determines whether or not the read frequency data matches the verification data stored in the verification data register 25. If a negative result is obtained in step SP3, it is determined that the read frequency data has no abnormality (that is, there is no abnormality in the non-volatile memory 24), and the abnormality detection / abnormality display processing program ends in step SP5.

On the other hand, when a positive result is obtained in step SP3, the signal processing circuit 14 determines that the frequency data has an abnormality (that is, the nonvolatile memory 24 that has transmitted the frequency data has an abnormality), and the step SP4 Then, as shown in FIG. 5A, an IC (integrated circuit) number representing the non-volatile memory 24, for example, "IC701" is displayed. After that, the program proceeds to step SP5 and the program is terminated.

Further, the signal processing circuit 14 executes the abnormality detection and abnormality display processing in the preset mode according to the processing procedure shown in FIG.
This program monitors abnormalities in writing frequency data to the non-volatile memory 24.

The signal processing circuit 14 uses the preset mode designation key "STOR
When it is determined that the preset mode has been specified by selectively operating the "E", multiple numeric keys, the end key "ENTER", the multiple numeric keys, and the end key "ENTER" in this order, the program is started in step SP11. , Move to the next step SP12.

Before transferring the frequency data corresponding to the ten-key input to the non-volatile memory 24, the signal processing circuit 14 collates with the collation data stored in the collation data register 25 in step SP12. When a negative result is obtained, it is determined that the frequency data is normal, and the process moves to step SP13 to write the frequency data in the non-volatile memory 24, and after presetting, moves to step SP15 to end the program.

On the other hand, if a positive result is obtained in step SP12, the signal processing circuit 14 has an abnormality in the frequency data (that is, the signal processing circuit that attempts to transfer the frequency data).
14 is abnormal), the process proceeds to step SP14, and the IC number "IC702" representing the signal processing circuit 14 is displayed as shown in FIG. 5 (B), for example. Then step S
Move to P15 and terminate the program.

As described above, according to this embodiment, if the frequency data transferred between the signal processing circuit 14 and the memory 24 is abnormal, the abnormality is immediately displayed. Therefore, the user can promptly take measures. Further, according to this embodiment, the abnormality display is performed by specifying the circuit element having a high possibility that the abnormality has occurred, so that the user can take appropriate measures.

In the above description, the embodiment in which the receiver of the present invention is applied to the DBS receiver has been described, but the applicable range is not limited to this, and can be widely applied to a receiver having a channel frequency memory.

H Effect of the Invention As described above, according to the present invention, if there is an abnormality in the data transferred between the channel frequency memory and the signal processing circuit, this is immediately displayed, so that the user can be notified of the occurrence of the abnormality reliably and quickly. can do. Thus, the user can be promptly taken action for the abnormality.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the receiver according to the present invention, and FIGS. 2 and 3 are flow charts showing the processing procedures of the signal processing circuit in the tuning mode and the preset mode, respectively. FIG. 4 is a schematic diagram showing an input device, and FIG. 5 is a schematic diagram showing an abnormal display pattern. 1 ... Input device, 12 ... Broadcast wave receiving unit, 14 ... Signal processing circuit, 21 ... Key matrix, 23 ... Data display, 24
…… Nonvolatile raw memory, 25 …… Verification data register.

Claims (1)

[Claims] 1. A channel frequency memory having a memory area for storing the frequency of each channel to be received, and a signal processing circuit for controlling read and write operations of the channel frequency memory and having collation data for abnormality detection. When the data read from the channel frequency memory to the signal processing circuit coincides with the collation data, it is displayed that an abnormality has occurred in the channel frequency memory, and the signal processing circuit displays the channel frequency memory. Display means for indicating that an abnormality has occurred in the signal processing circuit when the written data matches the collation data, and identifies the circuit element in which the abnormality has occurred and displays the abnormality. The receiver characterized in that