JPH10257410A - Satellite reception system and power unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform polarization change of an antenna, supply of power to the antenna and supply of power to an amplifier while using the transmission line of reception signal concerning a satellite reception system provided with the amplifier on the transmission line of reception signal from the satellite reception antenna to the side of the terminal. SOLUTION: In a community reception system with which the received signals from the respective antennas of VHF, UHF and CS are amplified/mixed by a VU/CS booster 18 and further distributed into four by a four-distributor 10 so as to be transmitted to plural terminals, the four-distributor 10 and VU/CS booster 18 are constituted so as to transmit a voltage signal (DC) inputted from the terminal side to the side of a CS antenna 2. On the terminal side rather than the four-distributor 10, a power unit 20 is provided for generating the voltage signal (DC 11V or 15V) for supplying power to the booster 18 and the CS antenna 2 in combination with polarization change while receiving a polarization change signal outputted from a CS tuner 14 and for outputting that voltage signal to the side of the CS antenna 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for selectively transmitting to a terminal two types of reception signals obtained by receiving two types of radio waves having mutually different polarization planes transmitted from a communication satellite. The present invention relates to a suitable satellite receiving system and a power supply used in the system.

[0002]

2. Description of the Related Art Conventionally, two types of satellite receiving antennas (hereinafter, also referred to as CS antennas) for receiving transmission radio waves from communication satellites (hereinafter, also simply referred to as CS) have two orthogonal polarization planes transmitted from the CS. Or two types of radio waves having different directions of rotation of the polarization plane are known.

When this type of CS antenna receives, for example, a first voltage signal (generally, DC 11 V) for both polarization switching and power supply at an output terminal of a reception signal, the CS signal has two orthogonal signals.
A vertically polarized radio wave out of the polarized waves is converted into a reception signal in a predetermined frequency band and output, and a second voltage signal (generally, DC 15 V) for both polarization switching and power supply is received at an output terminal of the reception signal. And a receiver provided with a receiver for converting a horizontally polarized radio wave out of two orthogonally polarized waves into a received signal in a predetermined frequency band and outputting the signal.

A receiving terminal device (so-called CS tuner) that receives a received signal from a CS antenna of this type and demodulates a video signal and an audio signal is usually provided with a signal corresponding to the polarization plane of the received signal to be demodulated. The first voltage signal or the second voltage signal,
The reception signal can be output from the input terminal to the CS antenna side.

[0005]

However, when the above-mentioned CS antenna is actually installed and a signal received from the CS antenna is distributed by a distributor or the like and transmitted to a plurality of terminals, If the transmission path for transmitting the received signal from the antenna to the terminal becomes longer, the received signal is attenuated in the transmission path from the CS antenna to the terminal, and good receiving characteristics can be obtained with the CS tuner installed on the terminal side. May disappear.

To solve such a problem, an amplifier (hereinafter, also referred to as a booster) that can amplify a signal received from the CS antenna may be provided on a transmission path from the CS antenna to the terminal. Cannot be supplied with power from the CS tuner side. That is, since the power supply circuit for driving the CS antenna (specifically, the receiving unit) built in the CS tuner is for supplying power to the receiving unit of the CS antenna, the power supply circuit for both polarization switching and power supply is used. Although it is possible to selectively output the first voltage signal and the second voltage signal, the power capacity of the voltage signal is small,
The power supply to the CS antenna and the power supply to the booster cannot be simultaneously performed by these voltage signals.

For this reason, when a booster for amplifying a received signal is provided in the transmission path from the CS antenna to the terminal,
It is necessary to supply power directly from the commercial power supply to the booster, and there is a problem that it is difficult to install the booster directly below a CS antenna installed outdoors. In other words, in order to transmit the received signal to the terminal side without deteriorating, it is desirable to provide a booster directly under the antenna, but in this case, a power supply terminal for commercial power supply that has been waterproofed is installed. There is a problem that the wiring work is troublesome and safety measures such as earth leakage are difficult.In so-called common home reception in general households, a booster cannot be provided directly under the antenna, and the reception characteristics are poor. There were limits to improvement.

To solve this problem, a dedicated power supply device is used for the booster so that power is supplied through a power supply path different from a transmission path of a received signal for supplying power to the CS antenna. However, in this case, a power supply path must be provided separately from the transmission path for transmitting the received signal, and the wiring becomes complicated.

The above problem is not limited to a satellite receiving system that transmits only a signal received from a CS antenna to a terminal. For example, a VHF antenna that receives a received signal from a CS antenna and a VHF antenna that receives terrestrial television broadcast waves can be used. A joint receiving system equipped with a booster that mixes a signal received from another antenna such as a UHF antenna or a BS antenna for receiving a broadcast wave from a broadcasting satellite (BS) and amplifies only a signal received from the other antenna. But it also happens.

SUMMARY OF THE INVENTION The present invention has been made in view of such a problem. In a satellite receiving system provided with an amplifier in a transmission path of a received signal from a CS antenna to a terminal, the polarization of the received signal is switched and the CS signal is transmitted to the CS antenna. An object of the present invention is to enable power supply and power supply to an amplifier to be performed simultaneously using a transmission path of a received signal.

[0011]

According to the first aspect of the present invention, there is provided a satellite receiving system provided by a terminal via a transmission path for transmitting a received signal. It operates upon receiving a voltage signal, receives two types of radio waves having different polarization planes transmitted from a communication satellite, converts each of the received polarization signals into a reception signal in a predetermined frequency band, and transmits the signal on a transmission path. (That is, the terminal side). The satellite signal receiving means or the transmission path for transmitting the reception signal from the satellite signal receiving means to the terminal side includes two types of signals according to the voltage level of the voltage signal supplied from the terminal side via the transmission path. Polarization switching means for selecting one of the received signals and outputting the selected signal to the terminal. On the transmission path of the received signal, a received signal amplification which operates by receiving a voltage signal supplied from the terminal side via the transmission path, amplifies the received signal from the satellite signal receiving means and outputs it to the terminal side. Means are provided.

Further, on the transmission path closer to the terminal than the satellite signal receiving means, the polarization switching means and the received signal amplifying means,
A polarization switching signal whose voltage level is set according to a polarization signal to be received is received from a terminal device via a transmission path or a dedicated signal line, and is received at the same level as the polarization switching signal and at least a satellite signal. A voltage signal having an electric power sufficient to operate the receiving means, the polarization switching means, and the received signal amplifying means is generated, and the generated voltage signal is output to the satellite signal receiving means side via a transmission path and transmitted. Power supply means is provided for outputting a received signal transmitted from the satellite signal receiving means side via the path to the terminal side.

For this reason, according to the satellite receiving system of the first aspect, for example, the above-described CS tuner is provided on the terminal side, and this CS tuner outputs a polarization switching signal to the satellite receiving antenna side. If, for example,
A voltage signal is generated at the same level as the polarization switching signal and with sufficient power to operate the satellite signal receiving means, the polarization switching means, and the received signal amplifying means. Then, since the generated voltage signal is transmitted to the satellite signal receiving means via the transmission path, the received voltage amplifying means, polarization switching means,
And the satellite signal receiving means can be operated.
Therefore, a terminal signal such as a CS tuner transmits a reception signal corresponding to the polarization switching signal output from the terminal device, out of the two types of reception signals of the polarization planes received and frequency-converted by the satellite signal receiving means. Thus, the terminal device can obtain a reception signal with a desired polarization plane.

According to the present invention, each of the above means can be operated by the voltage signal generated by the power supply means, so that the amplifier (received signal amplifying means) provided on the transmission path as in the prior art is used. On the other hand, there is no need to supply power directly from a commercial power supply or to supply power in a system different from the transmission path of the received signal. As a result, it is possible to provide the reception signal amplifying means directly below the antenna, and it is possible to extremely easily construct a satellite reception system capable of obtaining good reception characteristics.

The input of the polarization switching signal from the terminal to the power supply means may be performed via a transmission path of the received signal, and may be performed using a signal line different from the transmission path. You may. This is because the power supply means supplies an operation voltage signal to each of the above means via the transmission path of the received signal, and can be arranged near a terminal device such as a CS tuner. That is, when the power supply device as the power supply unit is arranged near the terminal device,
Even if the polarization switching signal is directly input from the terminal device, the wiring of the polarization switching signal input signal line can be easily performed. What is necessary is just to set suitably.

Next, a second aspect of the present invention is the first aspect.
Wherein the satellite signal receiving means receives the first voltage signal from the terminal via the transmission path, and converts the first polarization signal of the two types of polarization signals into a reception signal of a predetermined frequency band. And outputs it on the transmission path. When a second voltage signal having a voltage level different from that of the first voltage signal is received, 2
A receiving unit that converts the second polarization signal of the types of polarization signals into a reception signal in a predetermined frequency band and outputs the signal on a transmission path, in other words, a reception unit having a function as polarization switching means. It is characterized by having.

Also in this satellite receiving system, power is supplied to the received signal amplifying means and the receiving part of the satellite signal receiving means on the transmission path by the voltage signal generated by the power supply means, and the satellite signal receiving means is provided. The polarization switching of the received signal transmitted to the terminal side can be performed by the receiving unit provided in the terminal, so that the same effect as the system according to claim 1 can be obtained.

[0018] On the other hand, the invention according to claim 3 is based on claim 1.
Wherein the satellite signal receiving means receives the voltage signal, frequency-converts the two types of polarization signals, and converts the frequency-converted two types of received signals into a pair of transmission signals for signal transmission. A pair of frequency converters for outputting the signals to the respective paths, and a receiving signal amplifier amplifies the received signals transmitted from the respective frequency converters via the pair of transmission paths, and outputs the amplified signals to the terminal side from the output terminal. And a pair of amplifiers for outputting a voltage signal supplied from the terminal side to the output terminal to each frequency conversion unit through a pair of transmission paths, respectively, and the polarization switching means connects one of the output terminals of each amplifier to one. Signal path switching means connected to the power supply means via two transmission paths; and determining whether the voltage signal supplied from the power supply means via the transmission path is the first voltage signal or the second voltage signal. By switching the signal path switching means in accordance with the result, characterized by comprising a voltage determining unit for outputting the received signal corresponding to the voltage signal on the terminal side.

That is, as a satellite receiving antenna for receiving radio waves having different polarization planes transmitted from a communication satellite, in addition to the above-mentioned antenna having the receiving section having a polarization switching function, there are two antennas.
There are known those provided with a pair of frequency converters (so-called converters) capable of individually converting the frequency of various types of polarization signals, and those provided with a frequency converter capable of frequency conversion of only a specific polarization signal. .

Therefore, a satellite receiving system according to a third aspect uses a satellite receiving antenna provided with such a pair of frequency converters, or has a frequency converter capable of frequency conversion of only a specific polarization signal. Satellite signal receiving means comprising a pair of frequency converters by using two satellite receiving antennas, and amplifying signals received from the respective frequency converters by a pair of amplifiers, respectively. Thus, one of the amplified received signals is selected according to the voltage signal generated by the power supply means and transmitted to the terminal. Also in this satellite receiving system, power is supplied to the received signal amplifying means (a pair of amplifiers) on the transmission path and to each of the frequency conversion units of the satellite signal receiving means by the voltage signal generated by the power supply means. Since the wave switching means can switch the polarization of the received signal, the same effect as the system according to the first aspect can be obtained.

Further, in the present invention, the satellite signal receiving means is provided with a pair of frequency converters and a pair of amplifiers is provided corresponding to each frequency converter. Switches the signal path switching means in accordance with the voltage signal supplied from the terminal side, thereby amplifying the received signal that does not need to be transmitted to the terminal side and the supply path of the voltage signal to the frequency conversion unit (that is, Since the transmission path of the received signal is interrupted, the power supply means only needs to generate a voltage signal that can operate one of the two systems of the received signal processing unit including the frequency conversion unit and the amplifier. There is no increase in power consumption compared to the satellite receiving system described in item 2.

Next, a fourth aspect of the present invention is directed to the first aspect.
In the satellite receiving system described in the above, the satellite signal receiving means receives the voltage signal, converts the two types of polarization signals into respective frequencies, and converts the two types of the frequency-converted received signals into a pair of transmission signals for signal transmission. A configuration including a pair of frequency converters each outputting to the path, and a pair of reception signal amplifying means for amplifying the reception signal from each frequency conversion unit on the terminal side than the satellite signal receiving means. And a satellite signal distributing means having a built-in pair of distribution circuits for distributing the amplified received signal to a plurality of signals, respectively.

The satellite signal distribution means receives the two types of received signals distributed by the pair of distribution circuits and selects one of the received signals, as the above-mentioned polarization switching means. A plurality of distribution output switching means for outputting selected reception signals from the distribution output terminals provided to the satellite signal distribution means by the number of distributions of the reception signals to the terminal side via the transmission path; Through the terminal side by determining whether the voltage level of the signal input from the terminal side through the terminal is the first voltage signal or the second voltage signal, and switching the corresponding distribution output switching means according to the determination result. A plurality of voltage determination means for outputting the reception signal of the polarization plane corresponding to the voltage signal from each distribution output terminal to the terminal side is provided, and at least one of the plurality of distribution output terminals, Distribution A voltage signal input from the terminal side to the input terminal via the transmission path is output to each frequency conversion unit via the pair of transmission paths, and the voltage signal is supplied to the internal circuit of the satellite signal distribution means by the voltage signal. A power supply circuit for supplying power is connected. Further, the power supply means is arranged on a transmission path from the distribution output terminal to which the power supply circuit is connected in the satellite signal distribution means to the terminal side.

As a result, in the satellite receiving system according to the fourth aspect, the distribution output terminals of the satellite signal distribution means receive signals from the terminals connected via the transmission path (or the transmission path and the power supply means). The reception signal of the polarization plane according to the wave switching signal is output, and each terminal can obtain the reception signal of the desired polarization plane.

In order to do this, it is necessary to always supply power to a pair of frequency converters provided in the satellite signal receiving means and a corresponding pair of received signal amplifying means to operate them. However, in the present invention, the voltage signal for power supply is generated by power supply means provided in one of a plurality of transmission paths from the satellite signal distribution means to the terminal side, and the generated power signal is further generated. Since the power supply circuit provided in the satellite signal distribution unit outputs the voltage signal to each frequency conversion unit side, the pair of reception signal amplification units and the pair of frequency conversion units are connected to the voltage from the power supply unit. It can always be operated by a signal.

Therefore, the satellite receiving system according to the fourth aspect can provide the same effect as the system according to the first aspect. Next, the invention according to claim 5 is:
A power supply device used as power supply means in the satellite receiving system according to any one of claims 1 to 4.
In this power supply device, the transformer / rectifier converts the AC voltage from the commercial power supply to a predetermined voltage and rectifies the voltage to generate a predetermined DC power supply voltage. And separates and extracts the polarization switching signal transmitted from the terminal.

Further, the determination section determines which of the first voltage signal and the second voltage signal is to be supplied to the satellite signal receiving means from the polarization switching signal separated and extracted by the polarization switching signal extraction section. The constant voltage power supply unit determines at least the satellite signal receiving means, the polarization switching means, and the received signal amplifying means from the DC power supply voltage generated by the transformer / rectifier in accordance with the result of the determination by the determining unit. First of sufficient power to operate
A voltage signal or a second voltage signal is generated, and the voltage signal superimposing section outputs the first voltage signal or the second voltage signal generated by the constant voltage power supply section to the satellite signal receiving means via a transmission path. At the same time, the reception signal transmitted from the satellite signal receiving means via the transmission path is output to the terminal.

Therefore, according to the power supply device of the present invention, the satellite signal receiving means, the polarization switching means, and the reception signal are at the same voltage level as the polarization switching signal output from the CS tuner or the like installed in the terminal. It is possible to generate a voltage signal having a sufficient amount of power to operate the signal amplifying unit.

[0029]

Embodiments of the present invention will be described below with reference to the drawings. [First Embodiment] FIG. 1 is a schematic configuration diagram showing the configuration of the entire joint receiving system of a first embodiment to which the present invention is applied.

As shown in FIG. 1, the joint receiving system according to the present embodiment is a so-called home joint receiving system for transmitting a reception signal from an antenna installed outdoors to each room in a general home. As a receiving antenna,
An offset type parabolic antenna (CS antenna) 2 for receiving orthogonally polarized transmission waves transmitted from a communication satellite (CS), and a VHF band and a UHF band transmitted from a ground station.
A VHF antenna 4 and a UHF antenna 6 are provided for receiving television broadcast waves of the band, respectively.

The CS antenna 2 corresponds to the satellite signal receiving means of the present invention (detailed in claim 2), and is disposed at the focal position of the reflecting mirror 2a and the supporting mirror 2a via the supporting arm 2b. And a receiving unit 2c. Receiver 2c
Is operated by a voltage signal for both polarization switching and power supply, which is input to the output terminal of the received signal from the terminal side.
a, and receives the orthogonally polarized transmission radio waves from the CS collected in a as a first polarization signal and a second polarization signal, respectively.
A first polarization signal according to the voltage signal input to the output terminal,
One of the second polarization signals is selected, and the selected polarization signal is converted to a predetermined frequency band (for example, 950 to 1500M).
(Hz) and output. In the present embodiment, when receiving 11 VDC as an output terminal as a first voltage signal, the receiving unit 2c outputs a reception signal obtained by frequency-converting a vertical polarization signal as a first polarization signal from an output terminal, When a DC voltage of 15 V is received at the output terminal as the second voltage signal, a reception signal obtained by frequency-converting the horizontal polarization signal as the second polarization signal is output from the output terminal.

Next, the output terminals of the antennas 2 to 6 are respectively connected to the input terminals for the respective received signals of the VU / CS booster 18 which is the amplifier of the received signals via coaxial cables. The received signals from the antennas 2 to 6 are input to the VU / CS booster 18, respectively. V
The U-CS booster 18 corresponds to the received signal amplifying means of the present invention, and operates by a voltage signal received at an output terminal.
When receiving signals from the antennas 2 to 6 are input to the respective input terminals, the respective receiving signals are amplified, further mixed, and output from the output terminals. In the VU / CS booster 18, an output terminal and an input terminal for receiving a received signal from the CS antenna 2 are connected via a choke coil or the like, and a voltage signal input to the output terminal is
An output from the input terminal to the CS antenna 2 side is provided via a coaxial cable.

It should be noted that the VU / CS booster 18 operates at 15 VDC even when 11 VDC is input to the output terminal.
And a power supply circuit for generating a constant voltage for driving an internal circuit from a voltage signal input to the output terminal so that the power supply circuit can operate even when the input is input. The VU / CS booster 18 may be configured to amplify all of the signals received from each of the above antennas, and a part of the received signals (for example, the received signal from the VHF antenna 4 and the It may be configured to amplify the signal received from the UHF antenna 6).

Next, the output terminal of the VU / CS booster 18 is connected to the input terminal of the distributor 10 via a coaxial cable, and the mixed reception signals from the antennas 2 to 6 Is input to Then, the received signal is divided into four in the distributor 10, and each is output from the distribution output terminals (four) of the distributor 10. In addition, the distributor 10
One of the four distribution output terminals is connected to the input terminal of the distributor 10 via a choke coil or the like.
In other words, the distributor 10 is of a so-called current passing type, and can output a voltage signal input to a current passing distribution output terminal to the VU / CS booster 18 from the input terminal.

Next, each distribution output terminal of the distributor 10 is connected to a terminal device such as the CS tuner 14 or the television receiver 12 via a coaxial cable or a terminal provided in each room. Of the four distribution output terminals of the distributor 10, a power supply device 20 as a power supply means of the present invention is provided on a transmission path (coaxial cable) from the current output distribution output terminal to the terminal device. Have been.

The input terminal T of the received signal of the power supply device 20
IN (see FIG. 2) is connected to a distributor 10 via a coaxial cable.
Is connected to the output terminal TOUT of the received signal.
(See FIG. 2) is connected to the CS tuner 14 via a coaxial cable or the like. The CS tuner 14
Can output two types of voltage signals for polarization switching and power supply to the CS antenna 2 from the input terminal of the received signal (DC 11 V for vertical polarization reception and DC 15 V for horizontal polarization reception). This is a configured general CS tuner.

Next, the configuration of the power supply device 20 will be described in detail. As shown in FIG. 2, the power supply device 20 includes a power transformer 22 that transforms an AC voltage (for example, 100 V AC) input from a commercial power supply through an AC plug into a predetermined AC voltage (for example, 24 V AC). A full-wave rectifier circuit 24 that generates a DC power supply voltage by full-wave rectifying an AC voltage transformed by the power transformer 22, and receives an output voltage from the full-wave rectifier circuit 24 to receive a predetermined DC constant voltage (this embodiment Then DC15
V), and a constant voltage circuit 28 that receives a DC constant voltage of 15 V generated by the constant voltage circuit 26 and generates a lower DC constant voltage (in this embodiment, DC 11 V). And

The constant voltage circuits 26 and 28 are provided with a voltage signal (DC 15 V or DC 1) having an electric power sufficient to simultaneously operate the VU / CS booster 18 and the receiving section 2 c of the CS antenna.
1V), and is configured around three-terminal regulators 26a and 28a with 15V output and 11V output, respectively. The constant voltage circuit 26
Capacitors C2 and C3 and a choke coil L3 for stabilizing the output (DC 15V) from the three-terminal regulator 26a are provided, and the constant voltage circuit 28 stabilizes the output (DC 11V) from the three-terminal regulator 28a. A capacitor C4 is provided for the operation.

Further, the power supply device 20 converts the received signal from each of the above-mentioned antennas inputted from the distributor 10 to the input terminal TIN from the DC and low-frequency signals connected between the input terminal TIN and the output terminal TOUT. The signal is output from the output terminal TOUT to the terminal (that is, the CS tuner 14) via the high-frequency signal passing capacitor C1 and the constant voltage circuit 26 or 2
DC constant voltage (DC 11V or DC 15
V) is output from the input terminal TIN to the distributor 10 side through the choke coil L2 having one end connected to the input terminal TIN for passing DC and low-frequency signals and blocking high-frequency signals, and further from the CS tuner 14. A voltage signal (11 V DC or 15 V DC) output and input to the output terminal TOUT is taken in via a choke coil L1 for passing a DC and low-frequency signal and cutting off a high-frequency signal, one end of which is connected to the output terminal TOUT. , A power supply separation circuit 32.

The voltage signal from the CS tuner 14 input via the choke coil L1 of the power supply separation circuit 32 is input to the voltage determination circuit 34 as a polarization switching signal. From the voltage level of the switching signal, the terminal currently determines which of the vertically polarized wave and the horizontally polarized wave received signal is required.

That is, the voltage determining circuit 34 includes a Zener diode D1 having a cathode connected to the other end of the choke coil L1 via the resistor R2, and a choke having a collector connected via the resistor R1 and the relay coil 30b of the relay 30. An NPN transistor TR1 whose base is connected to the anode of the Zener diode D1, grounded via a resistor R3, and whose emitter is grounded as it is, and which is connected to the other end of the coil L1. The voltage level of the voltage signal input as the polarization switching signal is equal to the breakdown voltage of the Zener diode D1 and the resistor R.
2, a determination voltage determined by the resistance value of R3 (for example, DC 1
3V) or more (that is, when a horizontally polarized reception signal is required), the transistor TR1 is turned on, causing a current to flow through the relay coil 30b, and conversely, being input via the choke coil L1. When the voltage level of the voltage signal is lower than the determination voltage (that is, when a vertically polarized reception signal is required), the transistor TR1 is turned off.
It operates to cut off the current supply to the relay coil 30b.

The relay 30 includes a relay coil 30.
b, the choke coil L of the power supply separation circuit 32
2 is connected to the output of the constant voltage circuit 26. When the relay coil 30b is not energized, the other end of the choke coil L2 is connected to the output of the constant voltage circuit 28.
Is provided.

As a result, when a voltage signal (11 VDC) for selecting vertical polarization is output from the input terminal of the CS tuner 14, the transistor TR1 in the voltage determination circuit 34 is turned off, and the relay coil is turned off. 30b is in a non-conductive state, and the DC 11 generated by the constant voltage circuit 28 is turned off.
A voltage signal of V is output to the distributor 10 side.
When a horizontal polarization selection voltage signal (DC 15 V) is output from the input terminal of the tuner 14, the transistor TR1 in the voltage determination circuit 34 is turned on,
The relay coil 30b is energized and the constant voltage circuit 26
Is output to the distributor 10 side.

Then, this voltage signal is input to the output terminal of the VU / CS booster 18 via the distributor 10 and the coaxial cable, and is further input from the input terminal of the VU / CS booster 18 to the CS antenna 2 via the coaxial cable. Receiving unit 2
c is input to the output terminal. Therefore, the VU / CS booster 18 and the receiving unit 2c are connected to the input terminal TIN of the power supply device 20.
The receiver 2c is operated by the voltage signal (11V or 15V) output from the controller, and outputs the reception signal of the vertical or horizontal polarization corresponding to the voltage signal from the output terminal.

As described above, according to the joint receiving system of the present embodiment, in order to operate the VU / CS booster 18, the VU / CS booster 18 is supplied with power from the commercial power supply and is supplied with the power supply voltage for driving the internal circuit. It is not necessary to provide a voltage circuit for generating the signal or to supply power to the VU / CS booster 18 in a separate system from the coaxial cable for transmitting the received signal. VU / CS booster 18 and CS antenna 2
Since the power supply to the receiving unit 2c and the switching of the polarization plane can be performed, the wiring work can be extremely easily performed to realize the joint receiving system. Also, for example, even when the existing joint receiving system for receiving terrestrial broadcasting or receiving terrestrial broadcasting and BS broadcasting is changed to a joint receiving system capable of receiving CS broadcasting, a booster, a distributor, etc. It is only necessary to change the receiving device to a CS-compatible device, and it is easy to change the system.

In this embodiment, the power transformer 22 and the full-wave rectifier circuit 24 serve as the transformer and rectifier of the present invention (Claim 5).
In the polarization switching signal extraction unit of the present invention (claim 5), the relay coil 30 constituting the voltage determination circuit 34 and the relay 30
b is a constant voltage circuit 26,
28 and the relay switch 30a forming the relay 30 are provided in the constant voltage power supply section of the present invention (claim 5).
2, the choke coil L2 and the capacitor C1 correspond to the voltage signal superimposing unit of the present invention (claim 5).

Here, in the present embodiment, the power supply device 20 uses two constant voltage circuits 28 and 26 to provide DC 11 V and DC 15 V as the first voltage signal and the second voltage signal.
Has been described as being generated, for example, as shown in FIG.
In place of the above two constant voltage circuits 26 and 28, an output variable constant voltage circuit 29 capable of switching the output voltage between DC 11V and DC 15V is provided. The output voltage from the constant voltage circuit 29 may be switched directly.

That is, the output variable constant voltage circuit 29 shown in FIG.
Is basically the same as the constant voltage circuit 26 shown in FIG. 2 and comprises a three-terminal regulator 29a and capacitors C2 and C3 for voltage stabilization. 2 is different from that of FIG. 2 in that the reference potential setting terminal of the three-terminal regulator 29a is connected to the constant voltage output terminal via the resistor R4, and is connected to the relay switch 30a of the relay 30. That is, the terminal for use is switched between grounding directly by the relay switch 30a and grounding via the resistor R5.

In the output variable constant voltage circuit 29 configured as described above, when the relay switch 30a directly grounds the reference potential setting terminal of the three-terminal regulator 29a, the output voltage is set to the preset set voltage. And the relay switch 30a is a three-terminal regulator 29a
When the reference potential setting terminal is grounded via the resistor R5, the output voltage becomes higher than the set voltage by the voltage across the resistor R5.

Therefore, the output variable constant voltage circuit 2 shown in FIG.
9, a three-terminal regulator 29a having an output of 11V is used. When the output of the three-terminal regulator 29a is 15 VDC, the resistor R
By setting so that the voltage between both ends of 5 becomes 4V,
The output voltage can be switched to 11 V or 15 V by energizing / de-energizing the relay coil 30 b in the relay 30.

Therefore, in the power supply device 20 shown in FIG. 2, even if the output variable constant voltage circuit 29 shown in FIG.・ CS booster 18 and CS
The voltage signal supplied to the receiving unit 2c of the antenna 2 is
It is possible to switch between 1 V and 15 V DC, and the configuration of the power supply device 20 can be made simpler. [Second Embodiment] Next, a plurality of Cs are provided in the CS antenna.
There is known a multi-beam antenna provided with a plurality of receiving units for receiving transmission radio waves from each CS near a focal position of a reflector so that transmission radio waves from S can be received.
Then, using such a multi-beam antenna, CS
The present invention can be applied to a satellite receiving system that receives a broadcast. Hereinafter, a joint receiving system using a multi-beam antenna for receiving a CS broadcast will be described as a second embodiment of the present invention.

In the joint receiving system of this embodiment,
For example, as shown in FIG.
When a joint receiving system including a multi-beam antenna 40 configured to receive transmission radio waves from two CSs is configured, two receiving units 40a and 40b corresponding to each CS provided in the multi-beam antenna 40 are provided. A switch 42 for inputting any of the received signals from the VU / CS booster 18 is provided.

As shown in FIG. 5, the power supply 20 'further includes a low frequency (for example, 20 to 30 kHz) having a frequency sufficiently smaller than that of the received signal, in addition to the power supply 20 shown in FIG.
z) a pulse signal generating circuit 50 for generating a pulse signal, and a voltage signal (direct current 11) between the relay 30 and the power supply separation circuit 32.
V or 15 V DC), a pulse superimposing circuit 52 for superimposing a pulse signal on an output path, receiving a signal from the operation unit 54a, and switching whether or not to input a pulse signal from the pulse generating circuit 50 to the pulse superimposing circuit 52 A switch provided with a changeover switch (for example, an analog switch) 54 is used.

Further, the switch 42 is provided, for example, as shown in FIG.
As shown in (b), a high-frequency switch 42a that receives a signal received from the two receivers 40a and 40b and outputs one of the signals to the terminal, a polarization switching / power supply input from the terminal. Dual-purpose voltage signal (DC 11V or DC 1
5V) to determine whether the low-frequency pulse signal is superimposed on the high-frequency switch 42a according to the determination result (the presence or absence of the pulse signal).
And a pulse discriminating circuit 42b for switching to the 0b side.

The entire joint receiving system may be configured in exactly the same manner as the embodiment shown in FIGS. According to the thus configured joint receiving system, the changeover switch 54 is operated by operating the operation section 54a provided in the power supply device 20 '.
Is turned on, and a pulse signal from the pulse generation circuit 50 is input to the pulse superposition circuit 52, a voltage signal (11 VDC) output from the relay 30 to the distributor 10 via the choke coil L2 of the power supply separation circuit 32 If the changeover switch 54 is turned off by operating the operation unit 54a, the voltage signal output from the relay 30 is output to the distributor 10 as it is. . The switch 42 switches the receiving unit that outputs the reception signal depending on whether the pulse signal is superimposed on the voltage signal from the terminal side.
The user can switch the CS desired to be received by the CS tuner 14 by operating the operation unit 54a provided in the power supply device 20 '.

In each of the above embodiments, the distributor 10 is configured such that current can pass between a specific distribution output terminal to which the power supply devices 20 and 20 'are connected and an input terminal. For example, each distribution output terminal and input terminal of the distributor 10 are connected via a series circuit of a choke coil and a diode, respectively, so that current can be passed between all distribution output terminals and input terminals. In addition, a configuration may be adopted in which different output terminals do not pass current. With this configuration, the VU / CS booster 18 and the CS antenna 2 can be output from any of the distribution output terminals of the distributor 10.
Power can be supplied to the receiving unit 2c (or each of the receiving units 40a and 40b of the multi-beam antenna 40), and the positions at which the power units 20, 20 'and the CS tuner 14 are provided can be changed as appropriate. become.

As described above, as an embodiment of the present invention, a receiving section which can switch the polarization plane of a reception signal output from an output terminal to a terminal side in accordance with a voltage signal input from the terminal side (that is, the polarization switching of the present invention) Although the joint receiving system for receiving CS broadcasts using the CS antennas 2 and 40 each including a receiving unit having a function as a unit has been described, the CS antenna includes a receiving unit having a polarization switching function as a receiving unit. In addition to the unit, one provided with a pair of frequency converters (so-called converters) capable of individually converting the frequency of two types of polarization signals, or one provided with a frequency converter capable of frequency conversion of only a specific polarization signal Etc. are known. When a CS broadcast is received using a CS antenna having such a receiving unit, two types of reception signals corresponding to respective polarization planes are individually output from the CS antenna. 1st, 2nd
The configuration of the embodiment cannot construct a satellite receiving system. Therefore, next, as a third embodiment and a fourth embodiment of the present invention, a receiving unit including two frequency converting units and configured to simultaneously output received signals of each polarization plane from dedicated output terminals is provided. A system for receiving a CS broadcast using a CS antenna provided will be described. Third Embodiment FIG. 6 shows a satellite receiving system according to a third embodiment.

The satellite receiving system according to the present embodiment is
As shown in FIG. 6, an offset-type parabolic antenna is provided as a CS antenna 60 for receiving orthogonally-polarized transmission waves transmitted from a CS, as shown in FIG. This is a system for amplifying a received signal from the CS antenna 60 and transmitting the amplified signal to the CS tuner 14 on the terminal side.

The CS antenna 60 is an offset type parabolic antenna having a reflecting mirror 60a and a receiving section 60c disposed at a focal position of the reflecting mirror 60a via a supporting arm 60b. It is called a two-output type converter, receives and amplifies the transmission radio wave from the CS collected by the reflector 60a, and independently selects the polarization.
It is a well-known device provided with a pair of converters (that is, a frequency conversion unit) that converts received signals in a predetermined frequency band (for example, 950 to 1500 MHz).

The pair of converters constituting the receiving unit 60c are configured to independently select vertical polarization and horizontal polarization in accordance with a voltage signal supplied to its own output terminal. , An amplifier 62 as a received signal amplifying means via a coaxial cable for transmitting a received signal.
The input terminals of v and 62h are connected respectively. The subscripts “v” and “h” given to the reference numeral 62 of each amplifier represent a vertical polarization and a horizontal polarization, respectively. The amplifier 62v is for amplifying the reception signal of the vertical polarization, and the amplifier 62h is for the horizontal polarization. For amplifying received signals.

On the other hand, the output terminal of each amplifier 62 is connected to two input terminals of the path switch 64, and the output terminal (one) of the path switch 64 is connected to the power supply 20 via a coaxial cable. It is connected to the. The power supply device 20
Is exactly the same as the power supply device used in each of the above embodiments, and a CS tuner 14 and a television receiver 12 are arranged on the terminal side of this power supply device 20 as in the above embodiments. I have. Therefore, the power supply device 20 generates a polarization switching / power supply voltage signal corresponding to the polarization switching voltage signal output from the CS tuner 14 and receives the signals from the amplifiers 62 v and 62 h and the CS antenna 60. Part 60
c (specifically, a pair of converters)
The received signal from the CS antenna 60 is transmitted to the CS tuner 14.
Can be transmitted to

Next, the path switch 64 corresponds to the polarization switching means of the present invention (claim 3), and selectively connects one of the input terminals connected to the amplifiers 62v and 62h to the output terminal. And a switch 64a as a signal path switching means, which is connected to the power supply device 20, and the voltage signal from the power supply device 20 is a first voltage signal for selecting vertical polarization (11 V DC) or a second voltage for selecting horizontal polarization. If the voltage signal is 11 V DC, the changeover switch 64a is connected to the input terminal connected to the amplifier 62v, and
If the voltage is 5 V, a voltage discriminating circuit 64b is provided as voltage discriminating means for switching the changeover switch 64a to the input terminal connected to the amplifier 62h.

As a result, according to the satellite receiving system of the present embodiment, if the voltage signal from the power supply device 20 is the first voltage signal for selecting vertical polarization (11 V DC), the receiving unit 60c of the CS antenna 60 In the above, the CS tuner 14 is converted from a converter that converts a vertical polarization signal into a reception signal and outputs the received signal via an amplifier 62 v for amplifying the vertical polarization signal and the power supply 20.
Is formed, and if the voltage signal from the power supply device 20 is the second voltage signal for selecting horizontal polarization (15 V DC), the receiving unit 60 c of the CS antenna 60 converts the horizontal polarization signal into a reception signal. A transmission path from the converter that converts and outputs the signal to the CS tuner 14 via the amplifier 62h for amplifying the horizontally polarized signal and the power supply device 20 is formed, and a voltage signal generated by the power supply device 20 is used. , The amplifier and the converter corresponding to the voltage signal can be operated. [Fourth Embodiment] FIG. 7 shows a joint receiving system according to a fourth embodiment of the present invention.

The joint receiving system of the present embodiment includes, as receiving antennas, the CS antenna 60 configured in the same manner as in the fourth embodiment, and the VHF antenna 4 and the UH
An F antenna 6 is provided, and further operates by a voltage signal of a voltage signal (for example, 15 V DC) supplied from the terminal side to receive broadcast radio waves from a broadcast satellite (BS), and to receive a predetermined frequency band (for example, 1.0 to 1.0 V). A BS antenna 66 having a receiving unit 66a that converts the received signal into a 1.3 GHz (received) signal and outputs the converted signal. Note that a pair of converters provided in the receiving unit 60c of the CS antenna 60 convert the vertical and horizontal polarized signals into BS signals.
The signal is converted into a received signal in a higher frequency band (for example, 1.38 to 1.88 GHz) than the received signal from the antenna 66 and output.

The signals received from VHF antenna 4, UHF antenna 6, and BS antenna 66 (hereinafter referred to as V
U.BS signal) is input to an amplifier 68, amplified and mixed in the amplifier 68, and output to the terminal side. The output terminal of the amplifier 68 is connected to an input terminal 70i dedicated to the VU / BS signal of the distributor 70 via a coaxial cable.
The output terminals of the pair of converters constituting the c. are input terminals 7 dedicated to the vertically and horizontally polarized reception signals of the distributor 70, respectively.
0v, 70h.

The distributor 70 corresponds to the satellite signal distribution means of the present invention (Claim 4).
The VU / BS signal input to i is input to input terminals 70v and 7
0h is mixed with the received signal of each polarization plane, and the mixed signal (hereinafter, referred to as a vertical received signal and a horizontal received signal)
Are divided into four by dedicated distribution circuits 72v and 72h, respectively, and one of the four divided vertical reception signals and horizontal reception signals is output from four distribution output terminals 70a to 70d to the terminal side. Each of the distribution output terminals 70a to 70d is connected via a coaxial cable for transmitting a received signal to a CS tuner 14 arranged in each room of a facility where the common reception system is installed.

In the present embodiment, a power supply device 20 similar to that of each of the above embodiments is provided on a transmission path (coaxial cable) from the distribution output terminal 70d to the CS tuner 14. A voltage signal corresponding to the polarization switching signal output from the CS tuner 14 is generated, and the internal circuit of the distributor 70, the amplifier 68,
Power is supplied to the receiving unit 66a of the BS antenna and the receiving unit 60c (specifically, a pair of converters) of the CS antenna 60. Also, as shown in the figure, on the coaxial cable from the power supply to the CS tuner 14,
The VU / BS signal is separated from the received signal from the CS antenna 60 (hereinafter referred to as CS signal), and only the CS signal is
A demultiplexer SP1 for transmitting to the tuner is provided, and the VU / BS signal separated by the demultiplexer SP1 is
The VU / BS signal is separated into a VU signal and a BS signal, and is input to the duplexer SP2 which is input to the television receiver 12.

Next, in the distributor 70, the input terminal 70i
Is divided into two by the distribution circuit 72i. Then, the VU / BS signal divided into two passes through low-pass filters (LPF) 74a and 74b for passing the VU / BS signal and blocking the CS signal, and capacitors C11 and C12 for cutting DC and passing high frequency components, respectively. Are input to the distribution circuits 72v and 72h. Further, the vertically and horizontally polarized CS signals input to the input terminals 70v and 70h, respectively, pass through DC-cut and high-frequency component passing capacitors C13 and C14, respectively, to amplify each signal amplifying circuits 76v and 76h. To each of these amplifier circuits 76
v, 76h, then pass CS signal, VU, B
High-pass filter (HPF) 78v, 7 for blocking S signal
8h and the respective capacitors C11 and C12, the signals are input to the respective distribution circuits 72v and 72h. As a result, the distribution circuits 72v and 72h receive the vertical reception signal and the horizontal reception signal obtained by mixing the VU / BS signal and the vertical and horizontal polarization CS signals, respectively, as described above.

On the other hand, the distribution output terminals 70a to 70d
Are connected to polarization switching circuits 80a to 80d as polarization switching signals of the present invention (claim 4), respectively. The polarization switching circuits 80a to 80d
v, 72h, respectively, receives the vertical reception signal and the horizontal reception signal, and distributes them from the terminal side to distribution output terminals 70a to 70h.
This is for selecting a reception signal corresponding to the voltage signal supplied to the terminal 0d and outputting it to the terminal side from the corresponding distribution output terminals 70a to 70d.
72h, one of the vertical reception signal and the horizontal reception signal distributed and output is selected, and the corresponding distribution output terminal 7 is connected via the DC cut / high frequency component passing capacitors Ca to Cd.
Changeover switches 82a to 82d serving as distribution output switching means for outputting to distribution output terminals 70a to 70d.
0d from the terminal side to a choke coil L for cutting high frequency components
a through Ld, determine which of a vertical reception signal and a horizontal reception signal is to be selected from the voltage level of the captured voltage signal, and drive the changeover switches 82a to 82d according to the determination result. It is composed of judgment and drive circuits 84a to 84d as voltage judgment means. As a result, in the distributor 70 of this embodiment, the CS tuner 14 connected to the distribution output terminals 70a to 70d
The terminal device can output a reception signal of a desired polarization plane to the terminal device.

Next, the four distribution output terminals 70a
Of the power supply circuit 9 through the choke coil Ld to the distribution output terminal 70d to which the power supply device 20 is connected.
0 is connected. The power supply circuit 90 includes the power supply device 2
0 receives the voltage signal generated by CS, and amplifying circuits 76v and 76h for amplifying the CS signal provided in distributor 70, and CS
A voltage signal (DC 11) for operating the vertically polarized wave reception converter provided in the receiving unit 60c of the antenna 60
V), a three-terminal regulator 92, an amplifier 68 provided on the transmission path from the BS antenna 66 to the input terminal 70i, a receiver 66a of the BS antenna 66, and a receiver 60c of the CS antenna 60. A DC-DC converter 94 for generating a voltage signal (15 V DC) for operating a converter for receiving horizontally polarized waves. The voltage signal (DC 11 V) generated by the three-terminal regulator 92 is supplied to each of the amplifier circuits 76v,
76h, and the choke coil L11,
CS antenna 60 via input terminal 70v and transmission path
The voltage signal (DC 15 V) generated by the DC-DC converter 94 is supplied to the CS antenna 60b via the choke coil L12, the input terminal 70h, and the transmission path.
And the choke coil L13, LPF7
4b, the distribution circuit 72i, the input terminal 70i, and the transmission path to the amplifier 68, and further to the BS antenna 66 via the amplifier 68.

Therefore, in the joint receiving system according to the present embodiment, the power supply device 20 is provided similarly to the systems according to the above embodiments.
, Power can be supplied to the entire system including the CS antenna 60 and the amplification circuits 76v and 76h for amplifying the CS signal, and the terminals connected to the distribution output terminals 70a to 70d of the distributor 70 In spite of a complicated system that can receive a CS signal of a desired polarization plane on the side, power supply of the entire system can be easily realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a configuration of a joint reception system according to a first embodiment.

FIG. 2 is a configuration diagram illustrating a configuration of a power supply device according to a first embodiment.

FIG. 3 is a configuration diagram showing a modification of the power supply device shown in FIG.

FIG. 4 is a configuration diagram illustrating a configuration of a joint reception system according to a second embodiment;

FIG. 5 is a configuration diagram illustrating a configuration of a power supply device used in a joint reception system according to a second embodiment.

FIG. 6 is a configuration diagram illustrating a configuration of a satellite reception system according to a third embodiment.

FIG. 7 is a configuration diagram illustrating a configuration of a joint reception system according to a fourth embodiment.

[Explanation of symbols]

2, 60 CS antenna 40 Multi-beam antenna 2c, 40a, 40b, 60c Receiving unit 10, 70
... Distributor 14 ... CS tuner 18 ... VU / CS booster
Reference Signs List 20 power supply device 22 power supply transformer 24 full-wave rectifier circuit 26
28 constant voltage circuit 29 output variable constant voltage circuit 30 relay 30a
... Relay switch 30b ... Relay coil 26a, 28a, 29a ... 3
Terminal regulator 32 ... Power supply separation circuit 34 ... Voltage judgment circuit 42 ...
Switch 42a: High frequency switch 42b: Pulse discriminating circuit 50: Pulse generating circuit 52: Pulse superimposing circuit 5
4: Changeover switch 54a: Operation unit C1: Capacitors L1, L2 ...
Choke coils 62v, 62h, 68 ... Amplifier 64 ... Path changer 64a, 82a to 82d ... Changeover switch 64b ...
Voltage discriminating circuit 66 BS antenna 72i, 72v, 72h Distribution circuit 76v, 76h Amplifying circuit 80a-80d Polarization switching circuit 84a-84d Judgment / drive circuit 90 Power supply circuit

Claims (5)

[Claims] An operation is performed by receiving a voltage signal supplied from a terminal side via a transmission path for transmitting a received signal, and receives two types of radio waves having different polarization planes transmitted from a communication satellite, respectively. Satellite signal receiving means for converting each received polarization signal into a reception signal in a predetermined frequency band and outputting the signal on the transmission path, provided on the satellite signal reception means or the transmission path,
A polarization switching unit that selects one of the two types of received signals and outputs the selected signal to the terminal according to a voltage level of a voltage signal supplied from the terminal via the transmission path; Receiving signal amplifying means, which operates upon receiving a voltage signal supplied from a terminal side via the transmission path, amplifies a reception signal from the satellite signal receiving means, and outputs the amplified signal to a terminal side; The polarization switching signal, which is provided on the transmission path closer to the terminal than the signal receiving means, the polarization switching means, and the reception signal amplifying means and whose voltage level is set according to the polarization signal to be received, is transmitted to the transmission path or the dedicated And a voltage of the same level as the polarization switching signal and of an amount of power sufficient to operate at least the satellite signal receiving means, the polarization switching means, and the received signal amplifying means. Generate a signal A power supply for outputting the generated voltage signal to the satellite signal receiving means side via the transmission path, and outputting a reception signal transmitted from the satellite signal receiving means side via the transmission path to the terminal side. Means, and a satellite receiving system. 2. The satellite signal receiving means receives a first voltage signal from a terminal via the transmission path, and converts the first polarization signal of the two types of polarization signals into a reception signal of a predetermined frequency band. And outputs the signal on a transmission path. When a second voltage signal having a voltage level different from the first voltage signal is received, the second polarization signal of the two types of polarization signals is received in a predetermined frequency band. A receiving unit that converts the signal into a signal and outputs the signal on a transmission path,
2. The satellite receiving system according to claim 1, wherein the function of the polarization switching unit is realized by the receiving unit. 3. The satellite signal receiving means receives the voltage signal, frequency-converts the two types of polarization signals, and converts the frequency-converted two types of received signals into a pair of transmission signals for signal transmission. A pair of frequency converters for outputting the signals to the respective paths, the received signal amplifying unit amplifies the received signals transmitted from the respective frequency converters via the pair of transmission paths, respectively, and outputs a signal from the output terminal to the terminal side. And a pair of amplifiers for outputting the voltage signal supplied from the terminal side to the output terminal to each frequency conversion unit via the pair of transmission paths, respectively, wherein the polarization switching unit comprises: Signal path switching means for connecting one of the output terminals to the power supply means via one transmission path, and the voltage signal supplied from the power supply means via the transmission path is a first voltage signal or a second voltage signal. Voltage judging means for judging whether the signal is a voltage signal, and switching the signal path switching means according to the judgment result to output a reception signal corresponding to the voltage signal to the terminal side. The satellite receiving system according to claim 1. 4. The satellite signal receiving means receives the voltage signal, frequency-converts the two types of polarization signals, and converts the two types of frequency-converted reception signals into a pair of transmission signals for signal transmission. A pair of frequency converters for outputting the signals to the respective paths, a pair of reception signal amplifiers for amplifying the reception signals from the respective frequency converters on the terminal side with respect to the satellite signal reception unit, and reception after the amplification. Satellite signal distribution means incorporating a pair of distribution circuits for respectively distributing signals into a plurality of signals, wherein the satellite signal distribution means includes: as the polarization switching means, two types of reception signals distributed by the pair of distribution circuits; Each of the signals is received, one of the signals is selected, and the selected reception signal is transmitted from the distribution output terminals provided in the satellite signal distribution means by the number of distributions of the reception signal to the terminal side via the transmission path. Output to A plurality of distribution output switching means, each of which determines whether a voltage level of a signal input from the terminal side to each of the distribution output terminals via a transmission path is a first voltage signal or a second voltage signal, and according to the determination result, A plurality of voltage judging means for respectively outputting the reception signal of the polarization plane corresponding to the voltage signal inputted from the terminal side to the terminal side from each distribution output terminal by switching the corresponding distribution output switching means. A voltage signal input from at least one of the plurality of distribution output terminals to the distribution output terminal from a terminal via a transmission path is transmitted to each of the frequency conversion units via the pair of transmission paths. A power supply circuit for outputting and supplying power to the internal circuit of the satellite signal distribution means with the voltage signal is connected, and the power supply means is connected to the power supply circuit in the satellite signal distribution means. The satellite receiving system according to claim 1, wherein the satellite receiving system is arranged on a transmission path from the distribution output terminal to the terminal. 5. A power supply device used as power supply means in the satellite reception system according to claim 1, wherein the power supply device converts an AC voltage from a commercial power supply to a predetermined voltage and rectifies the voltage. A transformer / rectifier for generating a predetermined DC power supply voltage; a polarization switching signal extractor for separating / extracting a polarization switching signal transmitted from a terminal; A determining unit that determines which of the first voltage signal and the second voltage signal is to be supplied to the satellite signal receiving unit from the polarization switching signal; and the transformer / rectifier according to the determination result by the determining unit. A first voltage signal or a second voltage signal having a power amount sufficient to operate at least the satellite signal receiving means, the polarization switching means, and the received signal amplifying means from the DC power supply voltage generated by the unit; Constant voltage A first voltage signal or a second voltage signal generated by the constant voltage power supply unit to the satellite signal receiving means via the transmission path, and the satellite signal via the transmission path. A power supply device comprising: a voltage signal superimposing unit that outputs a reception signal transmitted from the signal receiving unit side to the terminal side.