JP2515014Y2 - Distributor with mixer - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention is a BS-IF signal (1 GHz) obtained by converting a satellite broadcast signal received by a parabolic antenna by a converter.
Band) and FM broadcast signals and / or VHF and UHF television broadcast signals (hereinafter referred to as ordinary television broadcast signals) are mixed, and this mixed signal is distributed to two or more output terminals. The present invention relates to a distributor with a device.

[Prior art]

When receiving satellite broadcasting, the received broadcast signal of the frequency of 12GHz band is converted into the BS-IF signal of the 1GHz band by the converter installed connected to the primary radiator of the antenna, and the converted BS-IF The system uses a cable to transmit signals to a television receiver for satellite broadcast reception. In this case, as a power source for operating the converter, a DC voltage of 15 V, which is superimposed on a cable and sent, is used. On the other hand, when the television signal is amplified by an amplifier or a booster (collectively referred to as a booster hereinafter) provided near the antenna and transmitted to the television receiver by a cable, the power for operating the booster is usually 24 The AC low voltage of the volt is superimposed on the cable and sent.

Conventionally, for example, a system as shown in FIG. 3 has been used to mix the above BS-IF signal with a normal television broadcasting signal and to supply an operating voltage to a converter or booster. In the figure, reference numeral 1 is a receiving antenna for a normal television broadcasting signal, and a signal received by the receiving antenna is amplified by a booster 2 and sent to a distributor 4 by a cable 3. One output of the distributor 4 is fed to the first input of the mixer 5.

6 is a parabolic antenna for receiving satellite broadcasting, the received satellite broadcasting signal is converted into a BS-IF signal by a converter 7 provided with the primary radiator, and the converted BS-IF signal is mixed via a cable 8. Is supplied to the second input of the vessel 5. The output of the mixer 5 is supplied to the BS tuner 10 via the cable 9. Of the output of the mixer 5, the BS-IF signal is detuned and converted by the tuner 10 and supplied to the television terminal 11, and the normal television broadcast signal is separated by the duplexer in front of the tuner 10. Then, it is supplied to the television terminal 11 via the tuner 10. BS tuner 10 is commercial AC voltage 100
It has a built-in power supply device that converts 15 V DC to 15 V DC, for example.
→ It is supplied as the operating voltage to the converter 7 connected to the primary radiator via the DC conductive path of the cable 8.

The other output of the distributor 4 is, for example, AC 24 from the cable 12.
It is supplied to the television terminal 14 through the power supply device 13 of the volt. The power supply device 13 transforms an AC low voltage of 24 V from a commercial AC voltage of 100 V, superimposes it on the signal circuit of the cable 12-> distributor 4-> cable 3, and operates the booster 2 via the AC conductive path and its operation. Supply as voltage.

[Problems to be solved by the invention]

In the conventional system as described above, the TV terminal
From 11, it is possible to selectively extract and receive satellite broadcast BS-IF signals and ordinary television broadcast signals,
There is a drawback that the BS-IF signal cannot be taken out from the television terminal 14 of the power supply device 13. This drawback can be eliminated by providing a distributor at the end of the cable 9 opposite to the mixer 5, and distributing the mixed signal to a plurality of tuners by this distributor. However, since the mixed output of the mixer 5 is a mixture of the BS-IF signal and the ordinary television signal having different frequencies, the attenuation received by the BS-IF signal while being transmitted through the cable 9. And the amount of attenuation that a normal television signal receives is different, and even if the levels of both signals at the output side of the mixer 5 are the same, the levels will be different when transmitted to the input side of the distributor. It's closed. Supplied to each tuner
It is desirable that the BS-IF signal and the normal television broadcast signal have the same level from the viewpoint that the same can be watched regardless of which broadcast is watched. Further, in the configuration of FIG. 3, because the booster 4 operates with an AC voltage and the BS-IF converter 7 operates with a DC voltage,
Since the DC voltage and the AC voltage cannot be superimposed on the same cable 9, the power supply device 13 and the distributor 4 must be provided even if only the normal television broadcast signal is not received. Was complicated. what if,
When the DC voltage and the AC voltage are superimposed on the same cable 9, only the DC voltage is applied to the booster 4 side terminal of the mixer 5 from the combined voltage of the DC voltage and the AC voltage after the mixer 5 is energized. A filter for taking out is provided, and further the mixer 5
A filter for extracting only the AC voltage from the combined voltage of the DC voltage and the AC voltage must be provided at the terminal on the BS-IF converter 7 side, and even in this case, the configuration is complicated.

[Means for solving problems]

The mixer-equipped distributor according to the present invention is a satellite broadcasting BS-IF.
A first input terminal to which a signal is supplied, a second input terminal to which a normal television broadcasting signal is supplied, a plurality of output terminals to which a television receiver is respectively connected, and the first
A BS-IF signal supplied to the input terminal of the mixer and a normal television broadcasting signal supplied to the second input terminal to generate a mixed signal, and a mixer arranged close to the mixer. A distributor that is directly connected to the mixer and distributes the mixed signal supplied from the mixer to the output terminals, and is connected between one of the plurality of output terminals and the first input terminal. And a DC conductive path for supplying a DC voltage for operation of the BS-IF converter connected to the first input terminal, another one of the plurality of output terminals, and the second input terminal. An AC conductive path which is connected between the second input terminals and supplies an AC low voltage for operating the booster and which is connected to the second input terminal is provided in one housing.

[Action]

In the distributor with a mixer having the above-described structure, one of the output terminals is supplied with the operating low DC voltage to the first input terminal, and the other one of the output terminals is supplied to the second input terminal for the operation. By supplying the AC low voltage, the converter for satellite broadcasting reception and the booster for receiving ordinary television broadcasting become active, and BS-IF signal of satellite broadcasting and ordinary television broadcasting signal are output to each output terminal. A mixture of is supplied. Moreover, since the mixer and the distributor are directly connected, the BS-IF signal of each output terminal and the normal television signal are supplied to the distributor without being transmitted through the cable. Therefore, the levels of both signals are the same.

〔Example〕

In FIG. 1, 20 is a first input terminal to which a BS-IF signal is supplied, 21 is a second input terminal to which a normal television broadcasting signal is supplied, 22 is a mixer, 23 is a distributor, 24 Is the first
, And 25 is a second output terminal. The first input terminal 20 is a distributor 2 via a high-pass filter for passing a BS-IF signal composed of capacitors C1, C2, C3 and an inductor L1.
It is directly coupled to the input 27 of the distribution transformer 26 which comprises 3. The second input terminal 21 is a distribution transformer via a low-pass filter for passing an ordinary television broadcasting signal, which includes capacitors C4, C5, C6 and inductors L2, L3, L4, L5.
Twenty-six inputs coupled to 27. In addition, C7 is an AC current blocking capacitor for operating the booster. A first output 28 of the distribution transformer 26 is coupled to a first output terminal 24 via a DC blocking capacitor C8, and a second output 29 of the distribution transformer 26 is coupled to a DC and operating AC voltage blocking capacitor C9. 2 output terminals 25. The operating DC low voltage supplied to the first output terminal 24 is the capacitor C10 and the inductor L.
It is sent to the first input terminal 20 through the high frequency blocking DC conductive path composed of L6 and L7. The operating AC low voltage supplied to the second output terminal 25 is the capacitor C11 and the inductor L.
It is sent to the second input terminal 21 through the high frequency blocking AC conductive path composed of 8 and L9. The distributor with a mixer described above is housed in one small electronic device housing having four terminals. Since the distributor with a mixer is accommodated in one electronic device housing, the mixer 22 and the distributor 23 are arranged very close to each other.

FIG. 2 is a schematic diagram showing an example of a receiving system using the distributor with mixer according to the present invention shown in FIG. 1, and the first input terminal 20 of the distributor with mixer 39 shown in FIG. Is connected to the converter 7 of the satellite dish 6 for receiving satellite broadcasting, and the second input terminal 21 is connected to the booster 2 via the cable 3. At the first output terminal 24 of the mixer-equipped distributor 39, for example, a BS tuner having a built-in DC power supply device for generating a DC voltage for operating the converter of 15 volts.
10 is connected via a branching device 32a having a branching terminal and an input terminal for energization, and a television receiver 30 is connected to the BS tuner 10. To the second output terminal 25 of the mixer-equipped distributor 39, for example, a power supply device 13 for generating an AC low voltage for operating a booster of 24 V is connected via a branching device 33a for energizing the branching terminal and the input terminal. Connected,
Another television receiver 31 is connected to the power supply device 13. 32b, 33b ... are branching devices for connecting other television receivers.

In the system of FIG. 2, when the power plugs 34 and 35 are plugged into a 100-volt commercial voltage outlet, the booster 2 has a cable 12a from the power supply 13 → a branch 33a → a cable 12b →
The AC low voltage for operation of 24 V is supplied through the conductive path formed by L8 and L9 of the distributor 39 with a mixer to the cable 3 to amplify the television signal received by the antenna 1. In addition, for the converter 7, the cable 9a from the BS tuner 10 to the branch device 32
A direct-current voltage for operation is supplied through a conductive path composed of a → cable 9b → distributor 39 with mixer L6, L7 → cable 8 to convert a satellite broadcasting signal from 12 GHz to 1 GHz band. Therefore, the BS-IF signal and the normal television broadcast signal are distributed to the output terminals 24 and 25 of the distributor 29 with a mixer, and the television receivers 30 and 31 receive the arbitrary broadcast signals by the tuning operation. Can be received. As the distributor 23, an arbitrary number of distributions such as 3 distributions and 4 distributions can be used in addition to the illustrated 2 distributions.

〔effect〕

According to this invention, the conductive path for DC voltage is formed from one output terminal to the first input terminal, and the conductive path for AC voltage is formed from the other output terminal to the second input terminal.
The operating voltage can be supplied to the BS-IF converter that operates with a voltage different from DC and AC and the booster for receiving ordinary television broadcasts without interfering with each other. It is only necessary to provide the conductive path and the AC voltage conductive path, and there is no need to separately lay a cord for supplying the operating voltage to the converter or the booster, and the configuration is simple. Further, since the mixer and the distributor are arranged in one housing, the distance between them is very short, and since both are directly connected to each other, both signals are hardly attenuated. In any of the output terminals, the levels of the satellite broadcast and the normal television broadcast signal are the same, and both can be viewed in the same state. Furthermore, since this distributor with a mixer is housed together in one housing, it can be easily attached to the antenna pole.

[Brief description of drawings]

FIG. 1 is a schematic circuit diagram of an embodiment of a distributor with a mixer according to the present invention, FIG. 2 is a schematic diagram showing an example of a receiving system using the distributor with a mixer according to the present invention, and FIG. 2 is a schematic diagram showing an example of the receiving system of FIG. 20 …… First input terminal, 21 …… Second input input terminal, 22
...... Mixer, 23 …… Distributor, 24 …… First output terminal, 25
...... Second output terminal, 27 …… Distributor input terminal, L6, L
7, C10 ... operating DC conductive path, L8, L9, C11 ... operating AC conductive path.

Claims (1)

(57) [Scope of utility model registration request] 1. A first input terminal to which a BS-IF signal for satellite broadcasting is supplied from a BS-IF converter, a second input terminal to which a normal television broadcasting signal is supplied from a booster, and a plurality of outputs. A mixer for generating a mixed signal by mixing a terminal, a BS-IF signal of the first input terminal and a normal television broadcast signal of the second input terminal, and a mixer arranged close to the mixer. A distributor that is directly connected to the mixer and distributes the mixed signal supplied from the mixer to the output terminals, and is connected between one of the output terminals and the first input terminal. And a first conductive path for supplying a DC voltage for operating the converter to the first input terminal,
A second conductive path connected between the other one of the output terminals and the second input terminal to supply an AC voltage for operating the booster to the second input terminal; Distributor with mixer that is installed in one housing.