JP2000049636A - Satellite digital broadcasting receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To precisely and easily adjust an antenna direction toward a desired artificial satellite even in a system where the satellite reception antenna does not have the display function of a reception level. SOLUTION: A digital CS tuner calls a desired telephone system through incorporated modem at the time of adjusting an antenna direction (S110). Sound signals (non-received sound, error sound and level adjusting sound) showing the reception state of a transmission radio wave from an artificial satellite which is to be received, and the reception level are transmitted to the telephone system (S140-S220). Consequently, the adjusting worker of the antenna direction can precisely adjust the antenna direction while the reception state of the desired satellite by the digital CS tuner is recognized by using a portable telephone set and PHS.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a receiving signal received from a satellite receiving antenna for receiving a radio wave of a digital satellite broadcast transmitted from an artificial satellite, and from the received signal, a predetermined signal designated from the outside. The present invention relates to a satellite digital broadcast receiving apparatus for selecting and demodulating a broadcast signal of a satellite or a predetermined channel.

[0002]

2. Description of the Related Art Conventionally, in order to easily perform a direction adjustment operation of a satellite receiving antenna, this type of receiving apparatus has been disclosed in, for example, Japanese Patent Laid-Open No. 6-314981. When the scramble method of the signal received from the antenna matches the scramble method of the signal desired to be received, the reception level is detected and sent to the satellite receiving antenna side.
There is known a device in which a control signal for permitting display is transmitted so that a reception level detection / display function provided to a satellite reception antenna side is effectively operated. In addition, when the receiving device is receiving a broadcast signal of a desired channel, the reception level of the signal is detected and transmitted to the satellite receiving antenna, so that the received signal is transmitted to the satellite receiving antenna. There is also known an apparatus capable of displaying a received level.

In these receiving apparatuses, there are a plurality of artificial satellites (currently, communication satellites) for transmitting digital broadcast radio waves, and the reception level of the radio waves is simply detected and displayed on the satellite receiving antenna side. Alone cannot determine whether or not the satellite receiving antenna is actually facing the artificial satellite that should receive the radio waves, and may adjust the antenna direction to the direction of the satellite that does not want to receive. Since the above-mentioned solution is used, by using each of the above-mentioned receiving devices and operating the display device of the receiving level provided on the satellite receiving antenna side, the direction adjustment of the satellite receiving antenna can be easily performed. Become.

[0004]

However, since the above-mentioned conventional receiving apparatus displays the reception level on a display provided on the satellite reception antenna, the function of displaying the reception level (or the function of detecting and detecting the reception level). It has to be used as a pair with a satellite receiving antenna having a display function), and the satellite receiving antenna without such a display function has a problem that the antenna direction cannot be easily adjusted.

The present invention has been made in view of such a problem, and in adjusting the direction of a satellite receiving antenna, the satellite receiving antenna does not have a reception level display function (or a reception level detection / display function). It is an object of the present invention to enable a general antenna to accurately and easily adjust its antenna direction toward a desired artificial satellite.

[0006]

Means for Solving the Problems and Effects of the Invention In order to achieve the above object, the satellite digital broadcast receiving apparatus according to the first aspect of the present invention comprises a conventionally well-known general satellite digital broadcast receiving apparatus (so-called digital CS tuner)
In the same manner as described above, a tuning / demodulating means for selecting and demodulating a broadcast signal of a predetermined satellite / predetermined channel designated from the outside from the received signal transmitted from the satellite receiving antenna, and the tuning / demodulating means And a modem for transmitting the viewing history of the broadcast signal by the public telephone network to the telephone terminal of the broadcaster of the satellite digital broadcast using the public telephone network.

[0007] In the satellite digital broadcast receiving apparatus of the present invention (claim 1), the level detecting means detects the signal level of the received signal transmitted from the satellite receiving antenna, and the satellite judging means selects the station. From the broadcast signal demodulated by the demodulation means, data for identifying the artificial satellite that transmitted the broadcast signal is extracted, and based on this data, the channel selection / demodulation means transmits a signal from a predetermined satellite designated externally. It is determined whether or not the satellite signal is demodulated. Also,
When a transmission command of the direction adjustment parameter of the satellite receiving antenna is input from outside (for example, by a button operation or the like or by a control code or the like from the telephone device on the satellite receiving antenna side transmitted via a modem), The adjustment parameter transmitting means transmits, via a modem, at least the determination result of the satellite determination means and the level of the received signal detected by the level detection means to the telephone device used on the satellite receiving antenna side as a direction adjustment parameter. Send.

That is, in the satellite digital broadcast receiving apparatus of the present invention (claim 1), the judgment result by the satellite judging means and the level of the received signal detected by the level detecting means are transmitted via a transmission line like the conventional apparatus. Instead of transmitting to the satellite receiving antenna side, the data is transmitted to a desired telephone device by communication means via a modem built in the receiving device.

For this reason, when adjusting the direction of the satellite receiving antenna connected to the satellite digital broadcast receiving apparatus of the present invention, the worker must use a wireless type such as a portable telephone, a PHS, or a slave unit of a cordless telephone apparatus. Own telephone equipment,
If the telephone number of the telephone device is specified as the transmission destination of the antenna direction adjustment parameter, and the transmission command of the antenna direction adjustment parameter is input, then, when the worker is outdoors in the presence of the antenna, When performing the adjustment work, it becomes possible to automatically transmit the antenna direction adjustment parameter to the telephone device carried by the worker.

[0010] Further, since the parameters for adjusting the antenna direction include not only the signal level of the received signal detected by the level detecting means but also the judgment result by the satellite judging means, the operator needs to use the telephone device. It is possible to easily find the optimal antenna direction that maximizes the reception level when the satellite receiving antenna is facing the desired artificial satellite while checking whether the satellite receiving antenna is facing the desired artificial satellite. The antenna direction of the satellite receiving antenna can be adjusted very easily and accurately.

According to the present invention, there is no need to provide a receiving level display device or a detecting device in the satellite receiving antenna so that the antenna direction can be adjusted simply and accurately as described above. Since a general-purpose telephone device that is commonly used may be used, the device can be realized at low cost without separately providing a dedicated device for adjusting the antenna direction.

Here, the parameters for antenna direction adjustment transmitted by the direction adjustment parameter transmitting means to the telephone device via the modem are basically the parameters of the broadcast signal from the desired satellite determined by the satellite determining means. The reception state and the signal level detected by the level detection unit at the time of receiving the broadcast signal may be used. The direction adjustment parameter transmission unit may transmit these parameters so that the telephone device can identify these parameters. As the simplest parameter transmission method from the direction adjustment parameter transmission means, a DTMF signal or a guard tone signal of a predetermined frequency is transmitted using a voice signal transmission function of a modem, as described in an embodiment described later. A method of changing the transmission interval of the signal in accordance with the level of the reception level in order to transmit the signal and to make the level of the reception level easily understandable.

However, it is not always necessary to use such a modem function for transmitting the parameters for adjusting the antenna direction. A speech synthesizer is used to convert a received satellite, a received level, and the like into spoken language, and the synthesized speech is transmitted. May be transmitted. Also, if the telephone device has a function of converting the received signal into image data and displaying the data, the receiving satellite and the reception level are converted into a data format that the telephone device can convert into image data and transmitted. Is also good.

When transmitting synthesized speech or image data in this way, the current channel selection / demodulation means as parameters for adjusting the antenna direction, not only the reception level and the judgment result by the satellite judgment means, are used. The receiving satellites and tuning channels being received, the procedure for adjusting the antenna direction, and the elevation and azimuth angles of the satellites, which are used as guidelines for adjusting the antenna direction, should also be transmitted to the telephone equipment owned by the coordinator via a modem. Becomes possible.

Still further, when the telephone device on the satellite receiving antenna side is connected via a modem, the transmission form of the direction adjustment parameter or the direction to be transmitted from the telephone device. When a command signal instructing the type of the adjustment parameter is transmitted, the function of changing the transmission mode or the type of the direction adjustment parameter to be transmitted to the telephone device in accordance with the command signal is transmitted by the direction adjustment parameter transmission. You may give to a means.

[0016] In this way, the operator can use the telephone device to select a station while adjusting the antenna direction.
Changing the satellite or channel to be selected and demodulated by the demodulation means, changing the antenna direction adjustment parameters transmitted by the direction adjustment parameter transmission means, or changing the transmission form of the parameters. This makes it possible to adjust the antenna direction more easily.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. First, FIG. 1 is a block diagram showing a configuration of a digital CS tuner 2 which is a satellite digital broadcast receiving apparatus to which the present invention is applied.

The digital CS tuner 2 of this embodiment receives a broadcast wave from a digital broadcasting communication satellite (CS) composed of a large number of transponders for relaying a digital broadcast wave from the ground, and illustrates the received wave. Is connected via a coaxial cable 6 to a well-known CS antenna (parabolic antenna) 4 which converts a received signal into a predetermined intermediate frequency band (for example, 1 GHz band) and outputs the received signal with a converter that does not
CS antenna 4 input via this coaxial cable 6
For selecting a broadcast signal of a predetermined satellite and a predetermined channel from among the received signals from the receiver, demodulating a video / audio signal included in the broadcast signal, and outputting the demodulated signal to a reproducing device such as a television receiver. Yes, it is configured as follows.

That is, the digital CS tuner 2 has a CS
From a reception signal transmitted from the antenna 4 (specifically, a converter thereof) via the coaxial cable 6, a predetermined satellite or a predetermined satellite corresponding to the channel designated by the user via the operation panel 12 or the remote control transmission unit 14. The received signal of the transponder is transmitted to a predetermined frequency band (for example, 400M
A tuner unit 20 for converting into an intermediate frequency signal of
An A / D converter 22 that converts the received signal converted into an intermediate frequency signal into a digital signal by the tuner unit 20, and scrambles the received signal converted into a digital signal by the A / D converter 22. When the received signal is not scrambled, a descrambling unit 24 is provided to pass the signal as it is. Each of these units is a receiving microcomputer (hereinafter referred to as a receiving microcomputer) 26.
The received signal output from the descrambling unit 24 is received by the receiving microcomputer 26.

The converter of the CS antenna 4 operates by receiving power supply from the digital CS tuner 2 side, and depending on whether the supplied voltage is DC 11V or DC 15V, a vertical signal transmitted from CS is transmitted. Since one of the polarized waves and the horizontally polarized waves is converted into a received signal and output, the tuner unit 20 transmits the direct current 11 to the CS antenna 4 side.
A voltage signal of V or 15 V can be selectively output. Then, the receiving microcomputer 26 outputs a polarization switching signal to the tuner unit 20 so that the reception signal of the polarization plane corresponding to the channel to be received is output from the CS antenna 4, and the tuner unit 20 The voltage signal (11 V or 15 V) to be output to the fourth side is switched.

The tuner section 20 includes a CS antenna 4
Is amplified to a predetermined level by an amplification circuit having an AGC (auto gain control) circuit, and then the reception signal of a predetermined satellite / transponder is converted to an intermediate frequency signal of a predetermined frequency band. The receiving microcomputer 26 receives the control signal output from the AGC circuit of the tuner unit 20 for adjusting the gain of the amplifier circuit, detects the level of the control signal, and thereby detects the received signal input from the CS antenna 4. Detect the level of

In this embodiment, the tuner unit 2
0, the A / D conversion unit 22, and the descrambling unit 24 function as a channel selection / demodulation unit. Next, the receiving microcomputer 26 outputs a broadcast signal component of the specified channel to the MPEG decoder 28 in the received signal fetched from the descrambler 24, and thereby, in accordance with the MPEG system, The compressed broadcast signal is expanded to an uncompressed normal broadcast signal. Then, the video signal component of the broadcast signal expanded by the MPEG decoder 28 is output to the video signal generation unit 30 and converted into an analog video signal. The audio signal component is output to an audio signal generation unit 32 and an optical digital modulation unit 34, respectively. The audio signal generation unit 32 converts the audio signal component into an analog audio signal. The signal components are converted to optical digital signals.

The analog video signal and the audio signal generated by the video signal generator 30 and the audio signal generator 32 are output to a television receiver, a video tape recorder, or the like. The audio signal converted to a digital signal is output to a digital audio reproducing / recording device such as a so-called MD device via an optical cable.

The digital CS tuner 2 is provided with the above-mentioned operation panel 12 so that a user can externally designate a channel of a received signal to be selected by the tuner section 20.
And a remote control transmitting unit 14 are provided.
Is input once to an operation microcomputer (hereinafter, referred to as an operation microcomputer) 16, and after the operation microcomputer 16 decodes the instruction content, a command signal representing the instruction content is transmitted to the reception microcomputer. 26. The operation microcomputer 16 includes a remote control receiving unit 18.
And communication between the remote control transmission unit 14 and the operation microcomputer 16 (for example, optical communication using infrared rays).
Is performed via the remote control receiver 18.

Next, the digital CS tuner 2 includes:
Data for operating the tuner in accordance with the contents of a reception contract made between the owner of the tuner and a broadcasting company that performs CS broadcasting, and paid broadcasts and the like that are tuned and demodulated by the tuner in accordance with the data. An interface 36 for a storage medium (in this embodiment, an IC card) for storing data representing a viewing history is provided. When an IC card is mounted on the interface 36,
The device can receive a pay broadcast.
A built-in modem 38 is provided for periodically transmitting the viewing history and the like of the pay broadcast stored in the IC card to the telephone terminal of the broadcaster.

The modem 38 is originally for transmitting the viewing history and the like stored in the IC card to the telephone terminal of the broadcasting company, but in the present embodiment, the CS antenna 4
In order to transmit the reception state of the broadcast signal and the like to the telephone device such as the mobile phone D owned by the antenna adjuster, the modem 38 is used at the time of the direction adjustment of the modem 38.
Employs a general-purpose modem capable of calling an arbitrary telephone number.

Hereinafter, the digital CS tuner 2 of this embodiment will be described.
In the following, a control process executed to adjust the direction of the CS antenna 4 will be described. FIG.
9 is a flowchart illustrating an antenna direction adjustment process performed by the reception microcomputer 26 for adjusting the direction of the S antenna 4.

This antenna direction adjustment processing is performed by the user through the operation panel 12 or the remote control transmission unit 14 together with the reception satellite information indicating the artificial satellite to be received and the antenna direction adjustment command (specifically, the antenna direction adjustment Is executed by inputting a parameter transmission command).

When this process is started, first, S
At 100 (S represents a step), a telephone number to which the above parameters are to be transmitted via the modem 38 (in this case, a mobile phone possessed when the user adjusts the antenna direction,
A telephone number input process for receiving a PHS or a wireless telephone device such as a cordless telephone device handset is executed. This input processing is performed, for example, by outputting a video signal for displaying a guidance image for inputting a telephone number to the video signal generation unit 3.
0 is output, and according to the guide image, the process is executed in a procedure of waiting for the user to input a desired telephone number from the remote control transmission unit 14.

In this input process, when the telephone number input by the user is accepted, the process proceeds to step S110 where the modem 3
8 to an external public telephone line network to transmit a call signal indicating the input telephone number. At S120, the call signal is transmitted to connect a telephone line to a telephone device to be called. Then, it is determined whether or not the communication is possible. Until it is determined in S120 that the communication is possible, after transmitting the calling signal in S130,
While confirming whether or not a predetermined time (for example, one minute) has elapsed, the process stands by until it is determined in S120 that the communication is possible. If it is determined in S130 that the predetermined time has elapsed after the transmission of the calling signal, it is considered that a desired telephone device could not be called due to an erroneous input of a telephone number or the like. Without shifting, the process directly proceeds to S240, where the connection to the public telephone network by the modem 38 is cut off, and the process ends.

Next, in S120, when it is determined that the telephone line is connected to the telephone number of the call destination and communication is possible, the process proceeds to S140. And S
At 140, an artificial satellite to which the aperture surface of the CS antenna 4 is to be directed is specified based on the received satellite information input by the user, and the received signal from the artificial satellite is the longest in one day (for example, The tuning data of the transponder corresponding to the antenna direction adjustment channel being broadcast (for 24 hours continuously) is read from the built-in memory. Then, in S150, a transponder tuning signal and a polarization switching signal corresponding to the read tuning data are output to the tuner unit 20.

As a result, a DC 11 V or 15 V voltage signal corresponding to the polarization plane of the transmission radio wave of the antenna direction adjustment channel is output from the tuner section 20 to the CS antenna 4, and this voltage signal is output from the CS antenna 4. Will be output. And C
If the opening surface of S antenna 4 faces the artificial satellite direction corresponding to the antenna direction adjustment channel, tuner unit 20 selects the antenna direction adjustment channel from the received signals transmitted from CS antenna 4 side. Tunes the received signal of the transponder corresponding to the
, Received data such as program information, scramble information, and satellite information for a plurality of channels included in the received signal of the transponder selected by the tuner unit 20 from the descramble unit 24.

Therefore, in S160, it is first determined whether or not the CS antenna 4 is receiving radio waves from artificial satellites based on whether or not any received data is input from the descrambler 24. If the received data has not been input from the descrambling unit 24, the process proceeds to S170, where the modem 38 outputs “unreceived sound” indicating that the CS antenna 4 has not been able to receive radio waves from artificial satellites. Then, the process proceeds to S230. The transmission of the "unreceived sound" is realized by, for example, transmitting a 550 Hz guard tone signal every two seconds from the modem 38 as shown in FIG.

At S160, the descrambling unit 2
If it is determined that any received data is input from the antenna 4, the aperture surface of the CS antenna 4 is directed to one of a plurality of artificial satellites capable of receiving radio waves. In S180, the descrambling unit 24
From the satellite information in the received data input from, the satellite name data specifying the satellite name that transmitted the received signal selected by the tuner unit 20 is detected.

Then, in S190, by comparing the satellite name data with the reception satellite information specified by the user, the transmission radio wave currently received by the CS antenna 4 is changed to the artificial satellite to be received. It is determined whether or not the signal is from the satellite, ie, whether or not the CS antenna 4 has been adjusted in the direction of the satellite to be received. If the CS antenna 4 has not been adjusted in the direction of the satellite to be received, S20
At 0, an "error sound" indicating that the direction of the CS antenna 4 is wrong is transmitted from the modem 38, and the flow shifts to S230. The transmission of the “error sound” is performed, for example, by referring to FIG.
As shown in FIG.
This is realized by transmitting a guard tone signal of 0 Hz at an interval shorter than “unreceived sound” (specifically, twice per second).

On the other hand, if it is determined in S190 that the CS antenna 4 can be adjusted in the direction of the artificial satellite to be received, the flow shifts to S210, where the control signal output from the AGC circuit in the tuner unit 20 is output. A / D converted and taken in, the signal level is detected, and the level (reception level) of the signal received from the CS antenna 4 is obtained from the signal level of the control signal. At S220, the modem 38 transmits a "level adjustment sound" corresponding to the reception level determined at S210.
Move to 230.

The "level adjustment sound" is transmitted by detecting a 1800 Hz guard tone signal having a higher frequency than the "unreceived sound" or the "error sound" from the modem 38 as shown in FIG. 3, for example. This is realized by transmitting at intervals corresponding to the received reception level. Specifically, for example, the reception level is determined to be one of 10 preset reception levels, and the reception level is set to the lowest reception level.
Level, the guard tone signal of 1800 Hz is transmitted once per second, and the number of times the guard tone signal is transmitted per second increases by one as the reception level increases by one step.
The “level adjustment sound” is transmitted in such a procedure that the reception level is increased every time, and if the reception level is the highest High level, a guard tone signal of 1800 Hz is transmitted at a rate of 10 times per second.

Next, in S230, it is determined whether or not the telephone line is disconnected on the side of the telephone device currently connected via the modem 38. Then, if the telephone line has not been disconnected, the process proceeds to S160, and the processing after S160 is executed again. If the telephone line has been disconnected, in S240, connection to the public telephone network by the modem 38 is performed. Is disconnected, and the process ends.

As described above, in the digital CS tuner 2 of the present embodiment, when adjusting the antenna direction, a desired telephone device is called via the modem 38.
An audio signal (unreceived sound, error sound, level adjustment sound) indicating the reception state of the transmission radio wave from the artificial satellite to be received and the reception level is transmitted to the telephone device.

For this reason, according to the digital CS tuner 2 of the present embodiment, when adjusting the direction of the CS antenna 4 connected to the tuner 2, the operator needs to use a mobile phone or a P-phone.
It is possible to have a wireless telephone device such as an HS or a cordless telephone device, and designate the telephone number of the telephone device as a transmission destination of parameters for adjusting the antenna direction (in this case, each of the above audio signals). For example, when the operator performs an adjustment work outdoors where the antenna is installed, the parameter for antenna direction adjustment can be automatically transmitted to the telephone device owned by the worker.

Therefore, the operator can emit a "level adjustment sound" from this telephone device and adjust the antenna direction so that the interval between the "level adjustment sounds" becomes the shortest, so that the CS antenna 4 can be accurately directed to a desired artificial satellite. And antenna adjustment can be easily performed. Then, according to the digital CS tuner 2 of the present embodiment,
Since there is no need to provide a reception level display device or a detection device on the CS antenna 4 side, a CS digital broadcast receiving system can be realized at low cost.

In this embodiment, S180 and S190
Functions as satellite determination means according to claim 1,
The process of S210 functions as the level detecting means according to claim 1, and causes the modem 38 to transmit "unreceived sound", "error sound", and "level adjustment sound" from S170 and S20.
0, S220 functions as the direction adjustment parameter transmitting means.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various embodiments can be adopted. For example, in the above embodiment, as parameters for adjusting the antenna direction, “unreceived sound”, “error sound”, and “level adjustment sound” indicating the reception state and the reception level of the transmission radio wave from the artificial satellite to be received, respectively. Is generated using a guard tone signal that can be generated by the modem 38. However, a voice synthesizer is provided between the receiving microcomputer 26 and the modem 38, and in the antenna direction adjustment processing, the voice synthesis is performed. The device may generate a guidance voice indicating a reception state or a reception level, and transmit the guidance voice as a parameter for adjusting the antenna direction from the modem 38.

For example, if the telephone device has a function of converting a received signal into image data and displaying the image data, the receiving microcomputer 26 generates image data representing a receiving satellite, a receiving level, and the like. The image data may be transmitted from the modem 38. And if you do this,
For example, as shown in FIG. 4, a display on the telephone device side may simultaneously display a reception network name indicating an artificial satellite or a transponder currently being received and a reception level. Also, a satellite name can be displayed instead of the receiving network name. Note that the image shown in FIG. 4 shows an example in which a reception level, a bar graph whose display length changes according to the size thereof, and “L” indicating the level display are displayed.

When the current reception state is transmitted from the modem by voice synthesis or image display as described above,
In addition to the reception state and the reception level of the radio wave from the desired satellite as in the above embodiment, for example, the descrambling unit 2
The signal quality obtained from the error rate or the like of the received data input from 4, the elevation angle / azimuth of the artificial satellite to be received, or the procedure for adjusting the antenna direction are also transmitted as parameters for antenna direction adjustment. Becomes possible.

Further, in the above embodiment, the digital CS
The tuner 2 has been described as unilaterally transmitting parameters for adjusting the antenna direction via the modem 38. However, for example, a DTMF signal or the like may be transmitted from a telephone device connected via the modem 38 to a call destination. Thus, it is also possible to specify the transmission form of the antenna direction adjustment parameter. That is, the receiving microcomputer 26 may change, for example, the transmission interval of the “level adjustment sound” according to the command signal input via the modem 38.

On the other hand, in the above embodiment, when the telephone device owned by the operator is called from the digital CS tuner 2 via the modem 38, and the telephone device and the modem 38 are connected via the public telephone network, In the above description, the parameter for adjusting the antenna direction is transmitted. For example, if the modem 38 is configured to have an automatic call receiving function, the modem can be transmitted from the telephone device owned by the worker using the public telephone network. And call digital CS tuner 2
Can be connected to the operator's telephone device.

The modem 38 is intended to transmit viewing history and the like to a telephone terminal on the broadcaster side by using a public telephone line network. If there is an extension telephone line network on the route to, the antenna direction adjustment parameters are transmitted to the cordless telephone device connected to the telephone line network using the extension telephone line network. You may make it.

Also, for example, a communication device having a wireless communication function as a cordless telephone device is provided in the digital CS tuner 2 and the modem 38 is connected to an external telephone line on the path from the modem 38 to the external telephone line. A switching device for disconnecting from the telephone line and connecting to the communication device is provided. When transmitting parameters for adjusting the antenna direction, the receiving microcomputer 26 switches the switching device to the communication device side and outputs from the modem 38. The parameter for antenna direction adjustment to be performed may be transmitted from this communication device. By doing so, it becomes possible to transmit the antenna direction adjustment parameter to another telephone device (that is, a child device of the cordless telephone) by communication between the child devices of the cordless telephone.

It should be noted that even when parameters for antenna direction adjustment are transmitted to another telephone device using an extension telephone line network or a communication device built in the digital CS tuner 2, the digital CS tuner 2 and The connection of the communication line with another telephone device can be made by calling from the digital CS tuner 2 side, or conversely, by making a call from another telephone device.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a digital CS tuner according to an embodiment.

FIG. 2 is a flowchart illustrating an antenna direction adjustment process performed by the digital CS tuner according to the embodiment.

FIG. 3 is an explanatory diagram showing a characteristic and a transmission cycle of each guide sound transmitted as an adjustment parameter from a digital CS tuner.

FIG. 4 is an explanatory diagram illustrating an example of a display image on the mobile phone side when image data is transmitted as an adjustment parameter.

[Explanation of symbols]

2 ... Digital CS tuner, 4 ... CS antenna, 6 ... Coaxial cable, 12 ... Operation panel, 14 ... Remote control transmission unit, 16 ... Operation microcomputer, 18 ... Remote control reception unit, 2
0: Tuner section, 22: A / D conversion section, 24: Descramble section, 26: Reception microcomputer, 28: MPEG decoder, 30: Video signal generation section, 32: Audio signal generation section,
34: optical digital modulator, 38: modem.

Claims (2)

[Claims] 1. A satellite receiving antenna for receiving satellite digital broadcast waves transmitted from an artificial satellite via a transmission line, and externally designated from among the received signals transmitted from the satellite receiving antenna. Channel selecting / demodulating means for selecting and demodulating a broadcast signal of a predetermined satellite / channel, and viewing history and the like of the broadcast signal by the channel selecting / demodulating means by using a public telephone line network. A modem for transmitting to the broadcaster's side telephone terminal, a level detecting means for detecting a signal level of a received signal transmitted from the satellite receiving antenna, comprising:・ From the broadcast signal demodulated by the demodulation means,
Extracting data specifying the artificial satellite that has transmitted the signal, based on the data, in the channel selection and demodulation means,
A satellite judging means for judging whether or not a satellite signal from a predetermined satellite designated from the outside is demodulated; and a command for transmitting a direction adjusting parameter of the satellite receiving antenna is inputted from outside, via the modem. A direction adjustment parameter for transmitting at least the result of the determination by the satellite determination means and the level of the received signal detected by the level detection means to the telephone device used on the satellite receiving antenna side as the direction adjustment parameter; A satellite digital broadcast receiving device, comprising: transmitting means. 2. The apparatus according to claim 2, wherein the direction adjustment parameter transmitting unit includes:
When a command signal instructing the transmission mode of the direction adjustment parameter or the type of the direction adjustment parameter to be transmitted is transmitted from the telephone device, the direction adjustment transmitted to the telephone device in accordance with the command signal 2. The satellite digital broadcast receiving apparatus according to claim 1, wherein the transmission mode or the type of the transmission parameter is changed.