JPH05102873A - Satellite broadcasting receiver - Google Patents

Abstract

PURPOSE:To adjust the direction of an antenna by one person by generating an AC voltage corresponding to a reception level at the satellite broadcasting receiver, superimposing this AC voltage by a cable connecting a converter attached to the antenna and the satellite broadcasting receiver, and detecting the AC signal level near the converter part. CONSTITUTION:Signals obtained at a reception antenna system 1 are supplied through a tuner 7 and a buffer 10 to an AC voltage generator 11 as AGC control signals. The output of the AC voltage generator 11 is superimposed to the frequency-converted signal of a satellite broadcasting outputted from the converter part and the output of a converter driving power source 9 by an anttena input contact plug 6 and supplied to a converter part 3. Since the adjusting person can read the frequency-converted signal level at an AC ammeter 12 connected to the converter part 3, the direction of the reception antenna can be adjusted even by one person.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast receiving converter section attached to an antenna for receiving satellite broadcasts, and the receiving level of the satellite broadcast receiving device for demodulating the satellite broadcast is controlled by the device. The present invention relates to a satellite broadcasting device in which the direction of an antenna can be adjusted by detecting a low-frequency AC signal output from the satellite broadcasting device.

[0002]

2. Description of the Related Art FIG. 2 is a block diagram of a conventional satellite broadcast receiving system, in which 1 is a receiving antenna device, 2 is an antenna unit, 3 is a converter unit, 4 is a signal transmission cable, and 5 is a signal transmission cable.
Is a satellite broadcast receiving device, 7 is a satellite broadcast tuner, 9 is a converter driving power source, 13 is a buffer, 14 is a reception level output terminal, and 15 is a DC voltmeter.

It goes without saying that the receiving system in this figure is well known, and the receiving best point detecting means outputs the AGC voltage in the tuner to the receiving level output terminal 14 via the buffer. Therefore, when adjusting the orientation of the antenna to a good reception state, one person roughly adjusts the orientation of the reception antenna by the latitude meter attached to the main body of the reception antenna unit, and the other one receives the television 4
Or the voltage of the reception level output terminal 14 attached to the satellite broadcast receiving apparatus 5 is read by the voltmeter 15, and the orientation of the reception antenna is adjusted well.

This type of satellite broadcast receiving apparatus includes, for example,
The one described in P23, 24 of October 1989 issue of TV technology is given.

[0005]

In the above prior art, when deciding the direction of the antenna of the satellite broadcasting receiver, one person has the antenna and the other one needs two or more persons by checking the reception level. There was a problem that it was difficult to raise the antenna.

An object of the present invention is to generate an AC voltage at the reception level within the satellite broadcast receiving device, and to superimpose it on a cable for signal connection between the converter attached to the antenna and the satellite broadcast receiving device. An object of the present invention is to provide a satellite broadcast receiving device in which one person can easily set up an antenna by detecting the AC signal level near the converter section.

[0007]

SUMMARY OF THE INVENTION According to the present invention, an AGC voltage in a tuner which changes according to a reception level of a satellite broadcast tuner main body in a satellite broadcast reception is used as a control signal to generate an AC voltage in another band. , By sending the AC voltage to the converter section of the satellite broadcasting antenna.

[0008]

[Operation] The AC voltage superimposed on the signal cable is extracted in the vicinity of the converter section attached to the antenna so as not to affect the satellite broadcast signal, the AC signal level is read, and the direction of the antenna is adjusted so that it becomes the maximum value. It can be adjusted.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a satellite broadcast receiving system according to the present invention, in which 1 is a receiving antenna device, 2 is an antenna unit, 3 is a converter unit, 4 is a signal transmission cable, 5 is a satellite broadcast receiving device, and 6 is an antenna plug. 7 is a satellite broadcasting tuner, 8 is a demodulation unit, 9 is a converter driving power supply, 13 is a DC buffer,
Reference numeral 11 is an AC voltage generator, and 12 is a DC voltmeter.

The operation of this drawing will be described below, but the operation from satellite broadcast reception to demodulation is well known and will be omitted. Next, the AGC output of the tuner 7 is supplied to the AC voltage generator 11 via the buffer 10. Here, the AC voltage generator 11 is used as a transmitter in a specific audible band, and the input from the buffer 10 is used as a control signal so that the output of the AC voltage generator 11 is increased or decreased. The signal is output and superposed on the frequency-converted signal of the satellite broadcast output from the converter section in the signal transmission cable 4, and further to the output of the converter drive power source 9, and the converted signal is supplied to the converter section 3. Furthermore, by connecting the AC ammeter 12 to the converter unit 3, the frequency-converted signal level input to the device 5 can be read relatively.

[0011]

According to the present invention, since the direction of the receiving antenna can be obtained while looking at the AC voltmeter in the vicinity of the converter section of the antenna, the satellite broadcasting antenna can be set up by one person, and the disadvantages of the prior art can be omitted, which is excellent. It is possible to provide a satellite broadcast receiving device having a different function.

[Brief description of drawings]

FIG. 1 is a block diagram of a satellite broadcast receiving system according to the present invention,

FIG. 2 is a block diagram of a conventional satellite broadcast receiving system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Receiving antenna device, 2 ... Antenna part, 3 ... Converter part, 4 ... Signal transmission cable, 5 ... Satellite broadcast receiving device, 6 ... Antenna plug, 7 ... Satellite broadcast tuner, 8 ... Demodulation part, 9 ... Converter. Drive power supply, 11 ... AC voltage generator, 12 ... DC voltmeter, 13 ... DC buffer.

Claims (1)

[Claims] 1. A converter for satellite broadcasting having a function of frequency-converting and amplifying a signal received from satellite broadcasting, and a function of receiving and demodulating a frequency-converted signal output from the converter. In a satellite broadcast receiving device, an audible band corresponding to the level of the frequency-converted signal input to the device or an AC voltage that does not interfere with the frequency-converted signal is generated at the same time and superimposed and can be supplied to the converter. Satellite broadcasting receiver with various functions.