JPH10341385A - Satellite-searching method for cs digital satellite broadcasting reception antenna and superimpose unit device for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To grasp reception conditions in real time by extracting an antenna level signal for antenna control which is overlapped with a CS digital reception radio wave through a base band signal, converting it into a VHF or UHF signal and displaying an image on a portable TV with a U/V tuner or the like. SOLUTION: A CSIF signal S1 from a converter 2 provided on a CS antenna 1 is supplied via a current pass type CS mixer 6 to a coaxial cable 3 and inputted via a current pass type CS branch filter 7, which is inserted near a tuner IRD4 for CS digital satellite broadcasting reception, to the IRD4 and video and audio base band signals S2 are outputted. The base band signal S2 from the IRD4 is converted into a VHF or UHF signal S3 by a modulator 8. Then, a U/V signal S4 which is modulated/amplified in a terminal reception image is monitored and received on a TV 10 with U/V tuner. Thus, the reception desired satellite is searched accurately, and the direction of reception antenna is fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for searching for a CS digital satellite by a terminal reception image feedback method when a CS digital satellite broadcast receiving antenna is installed, and to an apparatus for the method.

[0002]

2. Description of the Related Art Generally, when receiving CS digital satellite broadcasting, a CS digital satellite broadcasting receiving antenna 1 is used as shown in FIG.
(Hereinafter referred to as CS antenna 1), a converter 2 added to the CS antenna 1, a coaxial cable 3, and a tuner 4 for receiving CS digital satellite broadcast (hereinafter referred to as IRD4).
Then, the AV TV 5 is connected, the baseband signal S ₂ from the IRD 4 is input to the AV TV 5, and the direction of the antenna 1 is searched while receiving the radio wave from the satellite and watching the screen for antenna adjustment installed in the IRD 4. Is generally used. In addition, a method of directly connecting an antenna check meter to the converter 2 added to the CS antenna 1 and searching for the direction by measuring an AGC voltage that changes according to the direction of the CS antenna 1 or the like has also been common. In such a method, in order to confirm that the searched satellite is the satellite for the purpose of reception, it is necessary to move to the location of the television reception screen, check the broadcast content, and if it is wrong, re-move to the antenna installation location Then we had to search for the satellite again. This required a lot of time and effort during the satellite search.

[0003]

SUMMARY OF THE INVENTION When searching for a CS digital satellite broadcast desired to be received from a plurality of adjacent CS digital satellite broadcasts, a satellite search method using only an antenna check meter has to bother to confirm a target satellite. I had to relocate to the receiver.
In addition, if a monitor television in which an AV code or the like is wired from the IRD 4 is separately prepared, the adjustment screen can be monitored in the vicinity of the antenna installation place, but it takes a great deal of time for wiring and the like.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. In an antenna installation location, the reception status from the antenna to the IRD 4 can be directly confirmed at the installation location, and the total reception can be performed. It is an object of the present invention to provide a satellite search method for a CS digital satellite broadcast receiving antenna capable of evaluating a state.

[0005]

In order to achieve the above object, an IRD provided with a function of overlapping an antenna level display image and a received image is used to adjust an antenna overlapping a CS digital reception radio wave. The antenna level signal is extracted as a baseband signal, converted to a VHF or UHF signal, input to the antenna coaxial cable from the U / V terminal side of the duplexer, and superimposed. Then, this superimposed VHF or UHF signal is output from the U / V terminal input side of the mixer near the antenna, and this signal is displayed as an image on a portable TV equipped with a U / V tuner. IRD in which broadcast received image from IRD and antenna adjustment image are overlapped
The search for the direction of the antenna and the selection of the satellite to be received can be easily performed in real time at the antenna installation location while viewing the output terminal received image.

Also, the above-described satellite search method is facilitated by providing a unitized device by housing a modulator, an amplifier, a CS current passing type duplexer, a power supply unit, and the like in the same case.

Further, in the above-mentioned unitized device, means for supplying power to the CS digital antenna converter is added.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION

(Embodiment 1) An embodiment of the invention will be described based on an embodiment. In FIG. 2, a CSIF signal S ₁ from a converter 2 provided in a CS antenna ₁ is a current passing CS
A current passing type CS duplexer 7 (hereinafter referred to as a splitter) which is supplied to the coaxial cable 3 via a mixer 6 (hereinafter referred to as a mixer 6) and is inserted near a CS digital satellite broadcast receiving tuner 4 (hereinafter referred to as an IRD 4). IRD through the
4 the baseband signal S ₂ of the input video and audio is output. And the baseband signal S from this 1RD4
₂ is input to the AV television 5 and CS digital satellite broadcasting is received. On the other hand (hereinafter referred to as U / V signal) baseband signal _{S 2} is VHF or UHF signal by the modulator 8 from IRD4 is converted to _{S 3.} The U / V signals _{S 3} U
/ V amplifier 9, and further amplifies the amplified U / V signal S ₄ from the duplexer 7 near the IRD ₄ to the coaxial cable 3.
, And is extracted from the mixer 6 near the CS antenna 1, and the U / U modulated and amplified by the terminal received image.
V signals _{S 4} monitors received by the mobile TV 10 with U / V tuner. By monitoring the received image of the terminal, a satellite desired to be received is accurately searched and the direction of the receiving antenna is determined. Arrow E indicates that DC 15 V is supplied to converter 2.

(Embodiment 2) FIG. 3 shows the first embodiment.
Is a signal superimposing unit for use in a satellite search method for a CS digital satellite broadcast receiving antenna in the above. In the figure, 7 is a duplexer, 8 is a modulator, 9 is a U / V amplifier, which are the same as those used in the first embodiment. Although not shown in FIG. 2, a built-in battery 12 is added to a power supply unit 11 for supplying power to the modulator 8 and the amplifier 9, and these are further housed in one case, so that the portable unit can be easily carried and operated. A mold superposition unit device. This superposition unit device is manufactured as a structure that can be used repeatedly. A is a terminal connected to the coaxial cable 3, B is a terminal connected to the IRD 4, and C is a terminal connected to input a baseband signal from the IRD 4.

(Embodiment 3) FIG. 4 shows Embodiment 2 of the present invention.
The current passing type CS duplexer 7 is changed to the CS duplexer 13, a coupling capacitor C ₁ is added to cut off DC 15 V from the B terminal, and an alternating current is applied between the antenna side and the power supply side. Add the decoupling capacitor C ₂ for the bypass of the choke coil L and noise for blocking manner, converter power supply DC1
A portable superposition unit device characterized in that 5 V can be supplied to the antenna circuit. According to this device, the DC from this device to the CS antenna converter 2
15V power supply is possible.

[0011]

The present invention has the following effects because it is configured as described above. The CS terminal reception output image from the IRD 4 can be directly monitored in real time at the antenna installation location, and the physical distance between the antenna installation location and the television receiver, which is the above-mentioned problem, can be exceeded, so that even at locations far from the IRD 4 It is very easy to search for CS digital satellites for receiving purposes, set the antenna direction, and grasp the total reception status from the antenna to the IRD at a glance at a glance. Things.

The antenna adjustment signal and other signal qualities at the C / N level are displayed together with the received image at the location where the antenna is installed, so that it is possible to easily search for the satellite and set the antenna direction.

By using a portable signal superimposing unit, the members required for the satellite search method of the present invention can be made compact, and the satellite search operation can be performed most easily.

[Brief description of the drawings]

FIG. 1 is a basic connection diagram of CS digital reception.

FIG. 2 is a basic principle diagram of the present invention.

FIG. 3 is a configuration diagram illustrating a signal superimposing unit device for a satellite search method according to a second embodiment.

FIG. 4 is a configuration diagram illustrating a signal superimposing unit device for a satellite search method according to a third embodiment.

[Explanation of symbols]

1. 1. CS digital satellite broadcast receiving antenna CS digital antenna converter. 3. Coaxial cable 4. 4. Tuner with built-in decoder for CS digital satellite broadcast reception AV. TV 6. 6. Current passing type CS mixer 7. Current passing type CS duplexer Modulator 9. U / V amplifier 10. 10. Portable TV with U / V tuner DC15V power supply section 12. DC15V built-in battery CS splitter C ₁ . Coupling condenser C ₂ . Decoupling condenser L. Choke coil A. CS. IF input terminal B. CS. IF output terminal C. A.V baseband signal input terminal DC15V S ₁ . CSIF signal S ₂ . Baseband signal of terminal received image S ₃ . U / V signal modulated with a baseband signal S ₄ . S3 amplified

Claims (3)

[Claims] 1. A CS digital receiving facility comprising a CS digital receiving tuner connected to a CS digital satellite broadcast receiving antenna via a coaxial cable,
In the vicinity of the S digital receiving antenna, a CS current passing mixer is inserted into the coaxial cable.
In the vicinity of the digital receiving tuner, a CS current passing type duplexer is inserted into the coaxial cable, the baseband signal supplied to the AV television is taken out from the CS digital receiving tuner, and VHF or UHF is modulated by the modulator.
The signal is converted to an HF signal, amplified by a U / V amplifier, the VHF or UHF signal is superimposed on a coaxial cable via the CS current passing type duplexer, and the VHF or UHF signal is passed via the CS current passing type mixer. A satellite search method for a CS digital satellite broadcast receiving antenna, wherein a UHF signal is taken out, and the direction of the antenna is set while viewing the received terminal received image on a portable television equipped with a U / V tuner. 2. A modulator for converting a baseband signal extracted from a tuner for CS digital reception into a VHF or UHF signal, an amplifier for amplifying a VHF or UHF signal from the modulator, and an amplifier for amplifying the amplified signal. VH
The fact that a CS current passing type duplexer for superimposing an F or UHF signal on a coaxial cable and a power supply unit for supplying power to these modulators and amplifiers are unitized in the same case. A signal superimposing unit for a satellite search method. 3. A modulator for extracting a baseband signal from a tuner for CS digital reception and converting it into a VHF or UHF signal, an amplifier for amplifying a VHF or UHF signal from the modulator, and an amplifier for amplifying the amplified signal. V
A CS duplexer for superimposing and inputting an HF or UHF signal to a coaxial cable, a power supply to these modulators and an amplifier, and a power supply to an antenna converter via a choke coil were configured. A signal superimposing unit for a satellite search method, wherein a power supply unit is unitized in the same case.