JPS61195094A - Receiving equipment for satellite broadcasting - Google Patents

Abstract

PURPOSE:To enable a selective reception of a horizontal polarization signal or a vertical polarization signal by receiving a signal from a broadcasting satellite in the operating state of a converter and giving it to a receiver through a switching device. CONSTITUTION:When the vertical switch 20 of one side of a receiver 18 is set as on and the horizontal switch 21 of the other side of the receiver 18 is set as on, electric power for operating the converter that is outputted from the one side of the receiver 18 is supplied to a converter 4 through a switching device 10 and the electric power for operating the converter that is outputted from the other side of the receiver 18 is supplied to a converter 5 through the switching device 10. Thereby, the converters 4 and 5 receive the vertical polarization signal and the horizontal polarization signal from the broadcasting satellite through an antenna A. Therefore, each receiver 18 is able to receive the vertical polarization signal and the horizontal polarization signal separately.

Description

[Detailed description of the invention] The present invention aims to solve the following problems.

(Industrial Application Field) The present invention relates to a satellite broadcast receiving apparatus that receives broadcast signals arriving from a broadcast satellite.

(Prior art) In conventional equipment, a converter receives signals arriving from a broadcasting satellite, and the output is given to multiple receivers so that each receiver can enjoy satellite broadcasting. Depending on whether a vertically polarized signal or a horizontally polarized signal is to be received, it is necessary to operate the switching unit provided in the converter each time to set it to a state that matches the signal to be received. was there. For this reason, when one of the plurality of receivers is receiving, for example, a vertically polarized signal, there is a problem in that it is difficult for the other receivers to receive the horizontally polarized signal.

(Problems to be Solved by the Invention) This invention eliminates the above-mentioned conventional problems, and it goes without saying that each receiver can enjoy satellite broadcasting, and in that case, each receiver has horizontally polarized It is an object of the present invention to provide a satellite broadcast receiving device that can arbitrarily select and receive either a signal or a vertically polarized wave signal.

The configuration of the present invention is as follows.

(Means for Solving the Problems) The present invention takes the measures as described in the claims above, and its effects are as follows.

(Function) When the receiver is activated, power for operating the converter is sent out from the input terminal of the receiver. The power passes through the switch and appears at one of the vertical and horizontal terminals of the switch. Furthermore, that power is sent to a converter connected to that terminal, and that converter operates. When the converter is in operation, a vertically polarized signal or a horizontally polarized signal coming from a broadcasting satellite is received by the converter, and the received signal output from the converter is sent to the receiver through the switch.

(Example) Below, drawings showing examples of the present application will be described. In Figure 1, A indicates an antenna, l is a reflector, 2 is a primary radiator, and 3 is a branching filter for orthogonal polarization separation, which divides input radio waves into horizontal polarization and vertical polarization. It is used to decompose the wave into orthogonal linearly polarized waves. 4 is a converter for vertically polarized signal reception, and 5 is a converter for horizontally polarized signal reception, both of which receive power for converter operation from output terminals 4a and 5a, respectively, and perform reception operation. 6 is a distributor that outputs the high frequency signal (microwave signal) that enters the input terminal 7 to two output terminals 8.8, and also outputs the power for converter operation that enters the output terminal 8 to the input terminal 7. The direction is designed to be able to pass through. 1
0 is a switch, which is equipped 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. 13 and the vertical terminal 11 or the output terminal 13 and the horizontal terminal 12 can be selectively connected. Next, 18 shows a well-known receiver, in which 19 is a power switch, 20 is a vertical switch, 21
is the horizontal switch, 22 is the 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,
28 indicates a ground terminal, and 30 indicates a well-known television receiver.

In the above configuration, when the power switch 19 of any receiver 18 is turned on, power for operating the converter is output from the input terminal 23, and power for operating the switching device is output from the power terminal 26. be done.

When the switch 20 is closed, a pulse signal (pulse width 1.3 to 1.6 seconds) shown in FIG. 2 is output from the control signal terminal 27.
When the switch 21 is turned on, the pulse signal shown in Fig. 3 (pulse width 0.6) is output.
~1.0+s, pulse interval 25m5) is output.

In the switch 10, the pulse signal shown in FIG.
When the pulse signal shown in FIG. 3 is received, the vertical terminal 11 and the output terminal 13 are connected, while when the pulse signal shown in FIG. 3 is received, the horizontal terminal 12 and the output terminal 13 are connected.

Therefore, when the vertical switch 20 is turned on in the receiver 18, the power for operating the converter is transferred to the switch 10.
passing from the output terminal to the vertical terminal 11,
The power is sent through a distributor 6 to a converter 4 for vertically polarized signal reception, which is activated.

In this state, satellite broadcasting radio waves (approximately 4 GHz) arriving from a broadcasting satellite are reflected by the reflector l of the antenna A and received by the radiator 2. The signal is decomposed into a vertically polarized signal and a horizontally polarized signal by a splitter 3. The converter 4 then receives the vertically polarized signal. The received signal is converted to IG in converter 4.
The frequency is reduced to approximately Hz, and the signal (received signal) is output from the output end 4a. 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 the signal of the desired channel from among the input signals, and the selected signal is further decomposed into a video signal and an audio signal, and the signals are output to respective output terminals. It is sent to the receiver 30 from 24.25.

On the other hand, when the horizontal switch 21 in the receiver 18 is turned on, the power for operating the converter sent from the input terminal 23 is output from the output terminal 13 in the switch 10 to the horizontal terminal 12, and the power is transferred to the distributor 6. is sent to converter 5, which operates it. Therefore, in this case, the horizontally polarized signal among the signals demultiplexed by the demultiplexer 3 is received by the converter 5, and is transmitted to the IGH.
The received signal is converted to a frequency of about z and outputted from the converter 5. The output signal is sent to the receiver Ja 18 via the switch 10, as in the case of the vertically polarized signal, and the signal of the channel selected by the switch 22 is sent to the receiver 30.

Next, if 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 receiver 18 (lower side in FIG. 1), , the power for operating the converter output from one receiver 18 is supplied to the converter 4 through the switch 10 on the upper side of FIG.
Electric power for operating the converter outputted from the converter 5 is supplied to the converter 5 through the switching device 10 shown on the lower side of FIG. Therefore, both converters 4.5 operate. As a result, the reception I! shown in the upper part of Figure 1! Converter 4 in 18
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 of any receiver 1B is not turned on, power is not supplied to each converter 4.5 and they do not operate.

Next, FIG. 4 shows an example of a specific configuration of the distributor 6, in which the distributor 6 is provided with a conductor (W4 foil) 32 shaped as shown on an insulating substrate 31, and a resistor 33 (
270Ω) and 34 (82Ω).

Next, FIG. 5 shows an example of a specific configuration of the switching device 10. In the figure, 36 is a pulse discrimination circuit, a leading edge differentiating circuit 37, a monostable multi-bi break-38, an N
It consists of an 0R39, an integrating circuit 40, and a Schmitt trigger circuit 41. 42 is a relay drive circuit, and 43 is a relay, which includes a relay coil 44 and relay contacts 45 operated by the relay coil 44.

Next, the operation of the circuit having the above configuration will be explained based on FIG. First, as shown in (a), when a pulse like the one shown in FIG.
0R39 produces an output. The output is integrated by an integrating circuit 40, a Schmitt trigger 41 is turned on, and a relay drive circuit 42 produces an output as shown. As a result, the relay coil 44 is excited, and the relay contact 45 is switched to the switching terminal side. That is, the horizontal terminal 12 and the output terminal 13
are now connected. On the other hand, as shown in (b), when a pulse signal as shown in FIG. 2 is input as a control signal, the output of the monostable multi-vibration break-38 becomes as shown in the figure, and no output is generated at N0R39.

As a result, the relay coil 44 is not energized and the relay contact 4
5 is held in the state returned to the switching terminal a side.

That is, the vertical terminal 11 and the output terminal 13 are in a connected state.

Next, FIG. 7 shows a block circuit of the receiver 18.

In the figure, 47 is a power separation filter, 48 is a well-known signal processing section, 49 is a power supply circuit, 50 is a switching circuit, 51, 5
Reference numerals 2 denote pulse generators, each of which generates a pulse signal as shown (similar to that shown in FIGS. 2 and 3).

With the above configuration, when the power switch 19 is turned on, operating power is supplied from the power supply circuit 49 to the signal processing section 48, and power for operating the converter (for example, direct 2i
t18 V) is sent to the input terminal 23 through the power supply separation filter 47. Further, power for operating the switch (for example, 5 V DC) is sent to the terminal 26. If the horizontal switch 21 is turned on in this state, the switching circuit 50 will be in the state shown in the figure, and a signal from the pulse generator 52 will be 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, in the above state, input terminal 2
Received signals such as vertically polarized signals and horizontally polarized signals that enter 3 pass through a power supply separation filter 47 and then undergo signal processing in a signal processing section 48. That is, by operating a switch 22, a desired channel is selected and an image is processed. The signal and audio signal are demodulated, and each signal is output from output terminals 24 and 25.

Next, FIG. 8 shows a circuit obtained by constructing the circuit shown in FIG. 5 using commercially available electronic components. The pulse discrimination circuit 36 is constructed by connecting an integrated circuit 54 (for example, NE554 manufactured by Signetisok) to which resistors and capacitors as shown by symbols are connected. Further, the relay drive circuit 42 includes a transistor 55 and a capacitor 56.

Next, FIG. 9 shows a different embodiment of the present invention, which is a switching system that allows normal switching even when the control signal from the receiver is not continuous and is only sent out temporarily. It indicates a vessel. In the figure, the relay drive circuit 42e consists of two transistors 57 and 58. 59 is a polarity selection circuit, which includes four diodes D,
~D4, and capacitors C+ and Ct for preventing malfunction due to pulses of relay noise components. The relay 60 used includes two coils 61 and 62 and relay contacts 63 and 64 that alternately close when the respective coils are excited (latching relay).

In the structure described above, when a pulse signal as shown in FIG. 2 is applied to terminal 15e, a signal appears at terminals 12.13 of integrated circuit 54e, causing transistor 57 to conduct. Then, transistor 57, diode DI,
Electricity is applied through a path between the coil 61, the diode Dx, and the terminal 9 in the integrated circuit 54e, and the coil 61 is excited. As a result, the relay contact 63 is closed, and the vertical terminal lie and the output terminal 13e are connected.

This state is maintained even if there is no control signal at the terminal 15e.

On the other hand, when a pulse signal as shown in FIG. 3 is applied to terminal 15e, a signal appears at terminal 9.10 in integrated circuit 54e, causing transistor 58 to conduct. Then, transistor 58, diode Ds, coil 62, diode D
4. AN is applied to the path of the terminal 13 of the integrated circuit 54e, and the coil 62 is excited. As a result, relay contact 64 closes,
The horizontal terminal 12e and the output terminal 13e are connected. This state is maintained even if there is no longer a control signal at the terminal 15e.

It should be noted that parts that are functionally the same or equivalent to those in the previous figure are given the same reference numerals as in the previous figure with an alpha bent e, and redundant explanations are omitted.

(Also, in the next version, the same idea will be used, and the letter r will be added to the alpha head to omit redundant explanations.

Next, FIG. 10 shows an example of a different structure of a part of the switching device, in which a relay 6Of similar to the relay 60 in FIG. 9 operates a relay 43f similar to the relay 43 in FIG. 5. This is an example.

Such a circuit is a contact 63r in a relay 60f.

If the current capacity of 64f is insufficient to pass the power for operating the converter, or if the contacts 63r and 64f are not suitable for passing the microwave signal from the converter to the receiver (for example, the microwave transmission loss is large) It is preferable to use a relay 43f that satisfies these current passing capacities and microwave passing properties.

(Effects of the Invention) As described above, in the present invention, when receiving satellite broadcasting, horizontally polarized signals and vertically polarized signals are simultaneously received by the respective converters 4 and 5, and each received signal is Since the satellite broadcasting is sent to the receiving va 18 of the receiver va 18, a plurality of receivers 18 can each enjoy the satellite broadcasting.

Moreover, even if the horizontally polarized signal and the vertically polarized signal are simultaneously received and sent to each receiver 18 as described above, each receiver 18 can receive the horizontally polarized signal by using the corresponding switch 10. Even vertically polarized signals can be arbitrarily selected and received (irrespective of whether other receivers are receiving horizontally polarized signals or vertically polarized signals).

Moreover, in the case of the selection using the switch 10, the selection is made by switching the relay contact to one side or the other side in the switch 10 (i.e., the selection is made by switching the relay contact to one side or the other side).
Of course, the switching instruction can be performed manually, but also by selecting whether the receiver receives a horizontally polarized signal or a vertically polarized signal in one day. Another feature is that the above-mentioned switching instruction can be given by using two types of signals that are inevitably emitted from the system.

Furthermore, in the above case, since the selection of the three signals is performed by switching the relay contacts as described above, in addition to the selection of the received signal, the power for operating the converter sent from the receiver 18 is used to receive the horizontally polarized signal. The advantage is that it is possible to simultaneously select which of the converter 5 for vertical polarization signal reception or the converter 4 for vertical polarization signal reception is to be sent through the relay contact. Firstly, this has the effect of making it easier to perform the selection operation, and secondly, when receiving in any one of the plurality of receivers 18, the converter used for receiving In addition, if there is no reception in either 1B, the power to both converters can be cut off, thereby reducing the lifespan of the electronic elements in the converter. Even if the value is fixed, the converter has the effect of allowing long-term use.

[Brief explanation of drawings]

The drawings show an embodiment of the present application, and FIG. 1 is a block diagram, FIGS. 2 and 3 are waveform diagrams of control signals output from the receiver, FIG. 4 is a front view of the signal distributor, and FIG. Figure 5 is a block diagram of the switch, Figure 6 is a waveform diagram for explaining the operation of the switch, Figure 7 is a program diagram of the receiver, and Figure 8 is a circuit diagram showing an example of a specific circuit of the switch. , FIG. 9 is a circuit diagram showing a different example of the switch, and FIG. 10 is a partial diagram showing a different example of the relay part in FIG. 9. A... Antenna, 4... Converter for vertically polarized signal reception, 5... Converter for horizontally polarized signal reception,
10...Switcher, 18...Receiver. Figure 5 / Figure 6 Figure 4 Figure 7 Figure 8 Figure 9 Figure 10 Figure Zf

Claims (1)

[Claims] The vertical converter receives a vertically polarized signal arriving from a broadcasting satellite and outputs the received signal from the output terminal in its operating state. A converter for receiving polarized signals and power for operating the converter sent through the output terminal of the converter perform reception operation, and in its operating state, it receives a horizontally polarized signal arriving from a broadcasting satellite and converts the received signal to the above. A converter for receiving a horizontally polarized signal outputted from an output terminal; and a plurality of receivers each receiving a received signal arriving at an input terminal and transmitting power for operating the converter through the input terminal. A satellite broadcasting receiver comprising a number of switching devices corresponding to the number of receivers, each having a vertical terminal, a horizontal terminal, and an output terminal, and the vertical terminal in each switching device is connected to the vertical terminal. The horizontal terminal is connected to the converter for receiving polarized signals, the output terminal is connected to the input terminal of the corresponding receiver, and in each of the above switching devices, one side or the other side is connected. 1. A satellite broadcast receiving device comprising a relay contact that selectively connects a vertical terminal and an output terminal or a horizontal terminal and an output terminal by switching to the side.