JPH0795849B2 - Satellite broadcasting receiver - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention aims to solve the following problems.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a satellite broadcast receiving device that receives a broadcast signal coming from a broadcast satellite.

(Prior Art) In a conventional apparatus in which a signal coming from a broadcasting satellite is received by a converter and its output is given to a plurality of receivers so that each receiver can enjoy satellite broadcasting, a signal coming from a broadcasting satellite is used. Depending on whether the vertical polarization signal or the horizontal polarization signal is received, the switching unit provided in the converter is operated each time, and the state is adjusted to the signal to be received.

(Problems to be Solved by the Invention) In such a conventional satellite broadcast receiving apparatus, when one of the plurality of receivers receives, for example, a vertically polarized signal, another receiver Has a problem that it becomes difficult to receive a horizontally polarized signal.

Except for the above-mentioned problems of the prior art, it is needless to say that the present invention allows a plurality of receivers to enjoy satellite broadcasting, respectively. In that case, in each receiver, the presence or absence of other receivers or the type of received wave may be changed. It is an object of the present invention to provide a satellite broadcast receiving device capable of arbitrarily selecting and receiving a horizontally polarized signal or a vertically polarized signal regardless of the above.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention performs the receiving operation by the converter operating power sent through the output terminal of itself, and receives the vertically polarized signal coming from the broadcasting satellite in the operating state. The vertically polarized signal receiving converter that outputs the received signal from the output end and the converter operating power sent through the output end of itself perform the receiving operation, and in that operating state, it comes from the broadcasting satellite. And a converter for receiving the horizontally polarized signal that was configured to receive the horizontally polarized signal and output the received signal from the output end, and a converter that receives the received signal that arrives at each input end and that passes through each input end. In a satellite broadcast receiving device provided with a plurality of receivers adapted to transmit electric power for operation. The number of receivers corresponds to the number of receivers, each of which has a vertical terminal, a horizontal terminal, and an output terminal, and a switching operation selects between the vertical terminal and the output terminal or between the horizontal terminal and the output terminal. Equipped with a switch to connect the vertical, the vertical terminal in each switch to the converter for vertical polarization signal reception,
The horizontal terminal is connected to the converter for receiving the horizontally polarized signal, and the output terminal is connected to the input terminal of the corresponding receiver.

(Operation) When the receiver is operated, electric power for operating the converter is sent out from the input end of the receiver. The electric power passes through the switch and appears at one of the vertical terminal and the horizontal terminal of the switch which is switched. Further, the electric power is sent to the converter connected to the terminal, and the converter operates. In the converter operating state, the vertically polarized signal or the horizontally polarized signal coming from the broadcasting satellite is received by the converter, and the received signal output from the converter is sent to the receiver through the switch.

(Example) Hereinafter, drawings showing an example of the present application will be described. In FIG. 1, A indicates an antenna. In this, 1 is a reflector, 2 is a primary radiator, 3 is a demultiplexer for orthogonal polarization separation,
This is for decomposing the input radio wave into orthogonal linear polarized waves of horizontal polarized wave and vertical polarized wave. Reference numeral 4 is a converter for receiving a vertically polarized signal, and 5 is a converter for receiving a horizontally polarized signal. The converter receives electric power for operating the converter from the output terminals 4a and 5a, respectively, and performs a receiving operation. Next, 6 is a distributor, which outputs the high frequency signal (microwave signal) coming into the input unit 7 to the two output terminals 8 and 8 and
The electric power for operating the converter, which comes in, is passed to the input end 7. 10 is a switching device, which is provided with a vertical terminal 11, a horizontal terminal 12, an output terminal 13, a power supply terminal 14, a control signal terminal 15, and a ground terminal 16, and a control signal terminal.
Output terminal 13 and vertical terminal depending on the control signal coming in 15
11 or the output terminal 13 and the horizontal terminal 12 can be selectively connected. Next, 18 shows a known receiver. In this, 19 is a power switch, 20 is a vertical switch, 21
Is a horizontal switch, 22 is a channel selection switch, 23
Is an input terminal, 24 is a video signal output terminal, 25 is an audio signal output terminal, 26 is a power supply terminal, 27 is a control signal terminal, and 28 is a ground terminal. Next, 30 is a well-known television receiver.

In the configuration described above, when the power switch 19 of one of the receivers 18 is turned on, the power for operating the converter is output from the input terminal 23 and the power for operating the switching device is output from the power terminal 26. To be done. When the switch 20 is closed, the pulse signal shown in FIG. 2 (pulse width 1.3 to 1.6 ms, pulse interval 25 ms) is output from the control signal terminal 27, and when the switch 21 is turned on, the pulse signal shown in FIG. A pulse width of 0.6 to 1.0 ms and a pulse interval of 25 ms) are output. Switch
In FIG. 10, when the pulse signal of FIG. 2 is received at the terminal 15, the vertical terminal 11 and the output terminal 13 are connected, while when the pulse signal of FIG. 3 is received, the horizontal terminal 12 and the output terminal 13 are connected. To be done.

Therefore, when the vertical switch 20 is turned on in the receiver 18, the converter operating power passes from the output terminal of the switching device 10 to the vertical terminal 11, and the power passes through the distributor 6 and is vertically polarized. It is sent to the converter 4 for signal reception, which operates.

In such a state, the radio wave (about 4 GHz) of satellite broadcasting coming from the broadcasting satellite is reflected by the reflector 1 in the antenna A and received by the radiator 2. The signal is decomposed by the demultiplexer 3 into a vertically polarized signal and a horizontally polarized signal. The converter 4 then receives the vertically polarized signal. The received signal is dropped to a frequency of about 1 GHz in the converter 4, and the signal (received signal) is output to the output terminal 4a.
Is output from. The received signal passes through the distributor 6 and reaches the vertical terminal 11 of the switch 10, and the signal further passes through the switch 10 and is input from the output terminal 13 to the input terminal 23 of the receiver 18. In the receiver 18, a channel selection switch 22 selects a signal of a channel desired to be received from the input signals, and the selected signal is decomposed into a video signal and an audio signal and output terminals respectively. It is sent to the receiver 30 from 24 and 25.

On the other hand, when the horizontal switch 21 of the receiver 18 is turned on, the converter operating power sent from the input terminal 23 is output from the output terminal 13 of the switch 10 toward the horizontal terminal 12, and the power is distributed to the distributor 6 Through to the converter 5, which operates. Therefore, in this case, the horizontal polarized wave signal of the signal demultiplexed by the demultiplexer 3 is received by the converter 5, converted into a frequency of about 1 GHz, and the received signal is output from the converter 5. The output signal is the same as in the case of the above vertically polarized signal
The signal of the channel selected by the switch 22 is sent to the receiver 18 via 10 and is sent to the receiver 30.

Next, when the vertical switch 20 is turned on in one receiver 18 (upper side in FIG. 1) and the horizontal switch 21 is turned on in the other (lower side in FIG. 1) receiver 18, , The converter operating power output from one receiver 18 is supplied to the converter 4 through the switch 10 on the upper side of FIG. 1, and the converter operating power output from the other receiver 18 is the first. It is supplied to the converter 5 through the switch 10 on the lower side of the figure. Therefore, both converters 4 and 5 operate. This allows the receiver 18 on the upper side of FIG.
1 can receive the vertically polarized signal output from the converter 4, and the receiver 18 on the lower side of FIG. 1 can receive the horizontally polarized signal output from the converter 5. Next, when the power switch 19 is not turned on in any of the receivers 18, power is not supplied to the converters 4 and 5, and they do not operate.

Next, FIG. 4 shows an example of a specific configuration of the distributor 6. The distributor 6 comprises a conductor (copper foil) 32 having a shape as shown in the figure on an insulating substrate 31 and a resistor 33 ( 270
Ω), 34 (82Ω) are connected.

Next, FIG. 5 shows an example of a specific configuration of the switching device 10. In the figure, 36 is a pulse discrimination circuit, which is constituted by a leading edge differentiating circuit 37, a monostable multivibrator 38, a NOR 39, an integrating circuit 40, and a Schmitt trigger circuit 41. 42 is a relay drive circuit, 43 is a relay, and a relay coil
It consists of 44 and the relay contact 45 activated thereby.

Next, the operation of the circuit having the above configuration will be described with reference to FIG. First, as shown in (a), when a pulse as shown in FIG. 3 enters the terminal 15 as a control signal, the output of the monostable multivibrator 38 becomes as shown in the figure, and the NOR 39
Produces an output. The output is integrated by the integrating circuit 40, the Schmitt trigger 41 is turned on, and the relay drive circuit 42 produces an output as shown in the figure. As a result, the relay coil 44 is excited, and the relay contact 45 is switched to the switching terminal b side. That is, the horizontal terminal 12 and the output terminal 13 are connected. On the other hand, as shown in (b), when the pulse signal as shown in FIG. 2 is input as the control signal, the output of the monostable multivibrator 38 becomes as shown in the figure, and the NOR 39 does not output. As a result, the relay coil 44 is not excited,
The relay contact 45 is held in a state of returning to the switching terminal a side. That is, the vertical terminal 11 and the output terminal 13 are connected.

Referring now to FIG. 7, the block circuit of receiver 18 is shown. In the figure, 47 is a power supply separation filter, 48 is a well-known signal processing unit, 49 is a power supply circuit, 50 is a switching circuit, and 51 and 52 are pulse generators, respectively, as shown in FIG. 2 and FIG. Three
It emits a pulse signal (similar to that shown in the figure).

In the configuration described above, when the power switch 19 is turned on, operating power is supplied from the power circuit 49 to the signal processing unit 48, and converter operating power (for example, 18 V DC) is supplied to the power separation filter 47. It is sent through to the input terminal 23. Also, electric power for operating the switching device (for example, DC 5V) is sent to the terminal 26. When the horizontal switch 21 is turned on in this state, the switching circuit 50 enters the state as shown in the figure, and the signal from the pulse generator 52 is output to the terminal 27. When the vertical switch 20 is turned on, the switching circuit 50 switches as shown by the broken line, and the output signal of the pulse generator 51 is sent to the terminal 27. On the other hand, the received signals such as the vertically polarized signal and the horizontally polarized signal that come into the input terminal 23 in the above state are processed by the signal processing unit 48 after passing through the power source separation filter 47, that is, the operation of the switch 22. The desired channel is selected and the video signal and the audio signal are demodulated by, and the respective signals are output from the output terminals 24 and 25.

Next, FIG. 8 shows a circuit in which the circuit shown in FIG. 5 is constructed by using commercially available electronic parts. The pulse discrimination circuit 36 is an integrated circuit 54 (for example, manufactured by Signetic Co., Ltd.
NE554 is used), and resistors and capacitors as shown by the symbols are respectively connected. Further, the relay drive circuit 42 comprises a transistor 55 and a capacitor 56.

Next, FIG. 9 shows a different embodiment of the present application. Switching that enables normal switching even when the control signal from the receiver is not continuous but is only sent out temporarily It shows a container. In the figure, the relay drive circuit 42e is composed of two transistors 57 and 58.
Reference numeral 59 is a polarity selection circuit, which is a capacitor C for preventing malfunctions due to four diodes D1 to D4 and the pulse of the noise component of the relay.
Consists of 1, C2. The relay 60 is composed of two coils 61, 62 and a relay contact 6 which is exchangeably closed by exciting each coil.
The one with 3,64 (latching relay) is used.

In the above structure, when a pulse signal as shown in FIG. 2 is applied to the terminal 15e, a signal appears at the terminals 12 and 13 in the integrated circuit 54e and the transistor 57 becomes conductive.
Then, the transistor 57, the diode D1, the coil 61, the diode D2, and the terminal 9 in the integrated circuit 54e are energized to excite the coil 61. As a result, the relay contact 63 is closed and the vertical terminal 11e and the output terminal 13e are connected. Then, the state is maintained as it is even if the control signal disappears at the terminal 15e.

On the other hand, when a pulse signal as shown in FIG. 3 is applied to the terminal 15e, a signal appears at the terminals 9 and 10 in the integrated circuit 54e and the transistor 58 becomes conductive. Then, the transistor 58, the diode D3, the coil 62, the diode D4, and the terminal 13 of the integrated circuit 54e are energized and the coil 62 is excited. As a result, the relay contact 64 is closed, and the horizontal terminal 12e and the output terminal 13e
And are connected. Then, the state is maintained as it is even if the control signal disappears at the terminal 15e.

In addition, parts that are considered to be the same or equivalent in configuration to those in the previous figure in terms of function are denoted by the same reference numerals as those in the previous figure with the letter e added to omit redundant description.

(Also, in the next figure, the same letter is used and the letter f is attached to omit the duplicated explanation.) Next, FIG. It shows an example in which a relay 60f similar to the relay 60 in the figure operates a relay 43f similar to the relay 43 in FIG.

In such a circuit, the contacts 63f and 64f of the relay 60f are not sufficient to pass the electric power for operating the converter, and the contacts 63f and 64f are not sufficient to pass the microwave signal from the converter to the receiver. Use when appropriate (for example, when microwave transmission loss is large), and use the relay 43
As f, it is preferable to use one that satisfies the current passing capacity and microwave passing property.

(Effects of the Invention) As described above, according to the present invention, in the case of receiving a satellite broadcast, a converter for a horizontally polarized signal and a converter for a vertically polarized signal are provided.
4 and 5 receive at the same time, and each received signal is received by multiple receivers 18
Since it is sent to, it is possible to enjoy satellite broadcasting with multiple receivers 18, respectively.

Moreover, even if the horizontal polarization signal and the vertical polarization signal are simultaneously received and sent to each receiver 18 as described above, the horizontal polarization signal may be received by the switch 10 provided corresponding to each receiver 18 in each receiver 18. There is an arbitrariness in which the vertically polarized signal can be arbitrarily selected (regardless of whether the other receiver is receiving the horizontally polarized signal or the vertically polarized signal).

Further, in the case of the above reception, two signals can be selected by switching each switching device 10 as described above, and in addition to the selection of the reception signal, the electric power for operating the converter sent from each receiver 18, Through the switching device 10, it is possible to simultaneously select which of the horizontal polarization signal receiving converter 5 and the vertical polarization signal receiving converter 4 to send. This means that when receiving at any of the plurality of receivers 18, only the converter on the side used for reception can be operated and the other converter can be made to rest, and at any receiver 18 When you do not receive, you can cut off the power to both converters,
It has the effect of extending the life of the converter and enabling long-term use.

[Brief description of drawings]

The drawings show the embodiments of the present application. FIG. 1 is a block diagram, FIGS. 2 and 3 are waveform diagrams of control signals output from a receiver, and FIG. 4 is a front view of a signal distributor. FIG. 5 is a block diagram of the switching device, FIG. 6 is a waveform diagram for explaining the operation of the switching device,
FIG. 7 is a block diagram of the receiver, FIG. 8 is a circuit diagram showing an example of a concrete circuit of the switch, FIG. 9 is a circuit diagram showing a different example of the switch, and FIG. 10 is a relay in FIG. The partial view which shows the example from which a part differs. A ... antenna, 4 ... vertical polarization signal receiving converter, 5 ... horizontal polarization signal receiving converter, 10 ... switch, 18 ... receiver.

Claims (1)

[Claims] 1. A receiving operation is performed by converter operating power sent through an output terminal of itself, and in the operating state, a vertically polarized signal coming from a broadcasting satellite is received and the received signal is output from the output terminal. The converter for receiving the vertically polarized signal and the converter operating power sent through the output end of itself perform the receiving operation, and in the operating state, receive the horizontally polarized signal coming from the broadcasting satellite. A converter for receiving the horizontally polarized wave signal that outputs the received signal from the output end, and a received signal that arrives at each input end are received, and power for operating the converter is sent through each input end. In a satellite broadcast receiving device including a plurality of receivers, the number corresponding to the number of the above receivers Each also has a vertical terminal, a horizontal terminal and an output terminal, and with a switching device for selectively connecting between the vertical terminal and the output terminal or between the horizontal terminal and the output terminal by switching operation, The vertical terminal of each switch shall be connected to the converter for receiving the vertically polarized signal, the horizontal terminal shall be connected to the converter for receiving the horizontally polarized signal, and the output terminal shall be connected to the input terminal of the corresponding receiver. A satellite broadcasting receiver characterized by.