CN2139761Y

CN2139761Y - Double-system satellite T.V. receiver

Info

Publication number: CN2139761Y
Application number: CN92220315U
Authority: CN
Inventors: 袁正兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1992-09-22
Filing date: 1992-09-22
Publication date: 1993-08-04
Anticipated expiration: 2002-09-22

Abstract

The utility model provides a double-system satellite T.V. receiver. An intermediate frequency tuner, a double-system convertor and a radio-frequency modulator are combined into a whole. The utility model comprises the intermediate frequency tuner, a TA 7 1 9 3 decoder, a 5 6 1 2 matrix device, an MC 1 3 7 7 encoder, an accompanying sound channel with a PANDA accompanying sound decoder and the radio-frequency modulator. The utility model can convert signal of an S E C A M, N T S C system into the signal of a P An L-60 system, and has the advantages of convenient installation, easy debugging, low cost and four-level image quality.

Description

Double-system satellite T.V. receiver

The utility model relates to satellite television receiver.Be particularly related to the satellite television receiver of band system conversion function.

Prior art does not have the integrated satellite television receiving system of C-band, general outer dress C3 or C4(Toshiba) receiver, satellite television receiver is with the intermediate frequency tuner, standard converter, radio-frequency modulator is connected in series mutually, and each channel is wanted three machines, many machines will be installed by the satellite earth receiving station of general a plurality of channels, complexity is installed, and debug difficulties costs an arm and a leg.

The purpose of this utility model is to overcome above-mentioned deficiency, and a kind of satellite television receiver of integrated band system conversion function is provided, and this receiver band receives the sound channel of satellite panda audio signal (a kind of new channel signals on the satellite).Each channel is with the intermediate frequency tuner, and standard converter and modulator are integrated.

This reality is made novel characteristics: structure receives with the S-SYSTEM conversion integratedly for all adopting integrated circuit blocks, having, and has reduced cost, simplifies and installs, and debugging is convenient, has NTSC and PAL double-standard.The NTSC-m input, PAL-60 output.And panda sound accompaniment output interface is arranged, the sound accompaniment that can select north and south wave beam satellite television to transmit arbitrarily.

Description of drawings:

Fig. 1 is a double-standard satellite television receiver circuit block diagram of the present utility model,

Fig. 2 is used for TSC-system decoder circuit figure for TA7193 among Fig. 1,

Fig. 3 is put for AN5612 among Fig. 1 looks and matrix recovers three-primary colours matrix device circuit diagram,

Fig. 4 is a MC1377 encoder outward element circuit diagram among Fig. 1,

Fig. 5 is sound channel circuit theory diagrams among Fig. 1.

Describe an embodiment of the present utility model in detail below in conjunction with accompanying drawing.

Referring to Fig. 1, the utility model is the intermediate frequency tuner, standard converter, and radio-frequency modulator is integrated, and becoming one double-standard satellite television receiver comprises:

(a) intermediate frequency tuner, the TSC-system that outdoor abaxile parabolic antenna receives, Phase Alternation Line system composite video signal by the tuner single-conversion after, carry out double conversion by the intermediate frequency tuner, deliver to TA7193 integrated package A point.After arrangement, go into TA7193(15) pin.

(b) color decoder of forming by the TA7193 integrated circuit, with the TSC-system decoding video signal, from (24), (23), (1) pin output R-Y, B-Y, three color difference signals of G-Y, deliver to (15), (23), (12) pin of AN5612 integrated circuit.

(c) put by looking of forming of AN5612 integrated circuit and matrix recovers three-primary colours matrix device, B-Y, G-Y, three color difference signals of R-Y are handled, from (7), (8), (9) pin output R, G, B tristimulus signals, deliver to MC1377 integrated circuit (3), (4), (5) pin.

(d) the Phase Alternation Line system chromacoder of MC1377 and peripheral circuit composition, (9) pin connects the JK33 socket, the three basic signals that (3), (4), (5) pin are entered carry out the Phase Alternation Line system coding, from (9) pin output PAL-60 composite tv video signal, deliver to modulator.

(e) sound channel of forming by integrated package NE592, integrated package panda sound accompaniment decoder, triode T11, T13, T14, diode D4, D5, potentiometer W2, socket JK11, JK12, capacitor C 113, input termination JK11 socket, and connect the intermediate frequency tuner, output is the OUT end of panda sound accompaniment decoder, connect radio-frequency modulator herein, deliver to radio-frequency modulator after base band (B.B) signal processing with the output of intermediate frequency tuner.

(f) radio-frequency modulator, input serial connection MC1377 encoder 9 pin, and be serially connected with the OUT end of panda sound accompaniment decoder with sound channel, and the encoded video signal of MC1377 output and the audio signal of sound channel output are modulated, export radiofrequency signal to closed-circuit television.

Embodiment comprises Fig. 2,3,4,5 circuit diagram,

Circuit diagram when Fig. 2 is used for the decoding of TSC-system carrier chrominance signal for the TA7193 integrated package.The video full-color television signal, TSC-system frame frequency 60Hz signal is by outside (intermediate frequency tuner) input (15) pin, carrier chrominance signal is 0.25VP-P, the input connection element is: connect with capacitor C 14 after resistance R 15, the voltage-stabiliser tube D1 parallel connection, connect with transformer M1, M2, resistance R 14 again, take out signal by M2 level of transformer, input to (15) pin through capacitor C 17.

(13) pin input delay horizontal synchronizing pulse, its level 6VP-P signal enters (13) pin through inductance L 4, resistance R 22, R21, capacitor C 23, and (13) pin bias voltage just often is 0.5V～1.5V.

(17) pin is the burst signal output point, and external capacitor C13, inductance L 3, potentiometer W2 are in series.

(19) pin is the carrier chrominance signal output, directly connect triode T1 base stage, another path capacitor C 2 couplings go (2) pin to carry out the B-Y demodulation, triode T1 collector electrode meets potentiometer W4, signal amplifies the back and goes (3) pin to carry out the R-Y demodulation from the taking-up of W4 moved end through capacitor C 1, subcarrier frequency 3.58MHz no longer passes through line-by-line inversion, so (4) pin is unsettled.

(18) the external potentiometer W3 of pin, resistance R 19 control contrasts.

(20) pin external capacitor C20 goes into ground, and contact connects the color saturation potentiometer, the control color saturation.

(21) pin external capacitor C21, C22 series connection is for opening the look doors.

(9) (10) pin outer meeting resistance R13, potentiometer W1, resistance R 12 series connection are a branch road, resistance R 11, capacitor C 8 are another branch road, capacitor C 9, C10 are the 3rd branch road, (9) (10) pin is APC circuit control mouth, when potential difference is greater than 0.1V between (9) pin and (10) pin, should adjust subcarrier and shake frequently, potential difference is 0 until between the pin of (9) (10).

(5) pin is the subcarrier frequency filtering output end, and outer meeting resistance R6, R7, R6 remove (2) pin, and R7 removes (3) pin.

(13) pin connects capacitor C 18 and goes into ground, and another road connecting resistance R16 removes (13) pin, (14) foot control system ACC gain.

(6) pin external capacitor C7, C6, C4 go into ground, remove (7) pin after another road parallel resistance R8, the inductance L 2.Provide (6) (7) pin bias voltage by L2.

(8) pin outer meeting resistance R10 goes into, and another road connecting resistance R9 connects capacitor C 4, (8) foot control system colourity.

(11) pin is APC detection load, and external capacitor C11, C12 go into ground, another road through capacitor C 13, go into (7) pin, the one tunnel goes into ground through C11, L3, W2.

(12) pin is gone into ground, and (22) pin is the 12V power import.

(23) pin is the B-Y signal outlet.Output level 70VP-P, (24) pin is the R-Y signal outlet, and output level is 80VP-P, and (1) pin is the G-Y signal outlet, and output level is 80VP-P.

Fig. 3 looks for the AN5612 integrated package to be put and matrix recovery three-primary colours circuit diagram

(15) pin external capacitor C39, the R-Y signal is gone into through C39

(12) pin external capacitor C36, B-Y signal is gone into through C36

(16) the external potentiometer W6 of pin, W7, control parachrome saturation.

AN5612 inside is transported in R, G, the B three primary colors matrix device after R-Y, B-Y are delivered to the aberration amplifier, and this matrix device is added with Y-signal, and is added with blanking signal.

(6) the output pedestal level on the pin is 16VP-P

(1) pin is 1VP-P, is the Y-signal input port

(2) the external W4 potentiometer of pin, R31, C32, R30, C30

(3) the external C33 decoupling of pin goes into ground

(4) pin is gone into ground to external C34, and R32, W5, R34 go to pay the luminance potentiometer mid point, and another road connecting resistance R33 removes the luminance potentiometer mid point, control brightness.

(5) pin is a clamp pulse, and is collinear with burst gating pulse.

(7) the external D2 of pin, R36 output R signal, the external D3 of (8) pin, R37 output G signal, the external D4 of (9) pin, R35 output B signal,

(10) pin is gone into ground, and the external C35 of (11) pin goes into ground, and the external C37 of (13) pin goes into ground

(14) pin meets C38 and goes into ground, is respectively R-Y, B-Y, G-Y three aberration amplifier decoupling circuits.

(12) the external C36 of pin is the B-Y inlet

(15) external C39 is the R-Y inlet

(17) pin 12V power supply, the external potentiometer W8 of (18) pin, W9, R38, control contrast.

Fig. 4 is a MC1377 PAL encoder outward element circuit diagram

(3) pin outer meeting resistance R45, capacitor C 51, resistance R 46, the R signal is gone into (3) pin through R45, C51, and the G signal is gone into (4) pin through R47, C52, and the B signal is gone into (5) pin through R49, C53.

(17) external crystal resonator G of (18) pin and capacitor C 48, C49, C50, G is the 4.43MHz carrier oscillator, to shake and send into (17) (18) pin frequently, chrominance amplifier is sent B-Y look messenger in integrated package inside, the R-Y signal is also sent into chrominance amplifier through PAL-switch simultaneously, is exported by (13) pin, after colourity filtering, enter inner output amplifier by (10) pin again, and mix with-Y-signal for clamp.

(14) the external C4 of pin is+the 12V inlet

(20) pin is unsettled is that the PAL code signal exports

(15) pin is the power supply ground end

(19) pin goes into ground through C45

(12) pin is gone into ground through decoupling capacitance C44, clamp R-Y signal level

(11) pin is gone into ground through decoupling capacitance C43, clamp B-Y signal level

(13) pin goes into ground through R43

(10) pin goes into ground through C42

(7) pin goes into ground through C46

(6) pin connects-Y-signal through R42, for-the Y-signal inlet, meet electric capacity R41 again and go into ground

(9) be compound composite video signal APL-60, R-Y, B-Y, G-Y, modulator socket JK33 is removed in current potential 2.5VP-P outlet

(16) the external R44 of pin goes into (1) pin, is 8.2V reference data voltage

(8) straight-through 0 Ω of pin

R, G, B signal incoming level are 1.0VP-P, and output R signal level is 4.8VP-P, and the G signal level is 4VP-P, and the B signal is 4.4VP-P

Fig. 5 illustrates the sound channel circuit among the embodiment.Schematic diagram, panda sound accompaniment are the signal of the new emission of present satellite, (with 6 kinds of language).The satellite receiver of domestic present prior art does not have the panda sound accompaniment, in the time of the sound accompaniment of satellite transmission panda, because compressed ten times of this sound accompaniment frequency shift (FS)s (being 20dB), so can't receive the panda sound accompaniment.Present embodiment has solved this problem, both can receive common sound accompaniment, can receive the panda sound accompaniment again.

The circuit theory of Fig. 5 is:

Integrated tuner output base band (B.B) signal, signal is gone into from jack JK11, through triode T11 impedance matching, export by the T11 emitter-base bandgap grading, pass through R118, C111 enters NE592 integrated package (14) pin, after NE592 amplifies by (7), (8) pin output, again through emitter follower T13, after T14 isolates, by jack JK22 output level is the baseband signal of 1VP-P, be connected to the IN end of panda sound accompaniment decoder again, by OUT output panda audio signal, deliver to modulator again, the reference potential of NE592 after R124 and voltage-stabiliser tube D4 voltage stabilizing, is sent into (14) pin by R126 by power supply+12V, potentiometer W12 and capacitor C 113 are regulated the amplitude of baseband signal, and diode D5 is for removing to spread the circuit outward element.When receiving general sound accompaniment, signal is drawn from JK22, and for general sound accompaniment delivery outlet, in the time will receiving the panda sound accompaniment, signal is drawn from panda sound accompaniment decoder OUT end, is panda sound accompaniment delivery outlet.

The index of this machine is: the input and output impedance is 75 Ω, receive frequency 950MHz-1750MHz, and video output amplitude 1VP-P, power supply are wide power, exchange 130V-260V, image quality reaches level Four.This machine is compared cost and is descended 50% with domestic congenerous machine, be particularly suitable for the few satellite of amount and receive ground station.Antenna that this machine is joined can be the abaxile parabolic antenna of 1m diameter.Can easily antenna be installed on balcony.

Claims

1, double-standard satellite television receiver comprises the intermediate frequency tuner, and double-standard transducer and radio-frequency modulator is characterized by intermediate frequency tuner, double-standard transducer and radio-frequency modulator are combined into one, and becoming one double-standard satellite television receiver comprises:

(a) intermediate frequency tuner, input termination tuner output socket, the A end of intermediate frequency tuner output connecting resistance R15, connect with capacitor C 14 after resistance R 15 and the voltage-stabiliser tube D1 parallel connection, series transformer M1, M2, resistance R 14 again, M2 level be connected to TA7193 integrated package (15) pin after capacitor C 17 is connected, (15) pin is imported NTSC, Phase Alternation Line system composite video signal

(b) color decoder of TA7193 integrated circuit composition, the TSC-system vision signal enters from (15) pin of TA7193, after the TA7193 decoding, (24), (23), the output of (1) pin R-Y, B-Y, three color difference signals of G-Y from TA7193, the R-Y signal is coupled to (15) pin of AN5612 through C39 from TA7193 (24) pin, and B-Y signal is coupled to (12) pin of AN5612 through C36 from (23) pin of TA7193, the G-Y signal is coupled to AN5612 from (1) pin

(c) put by looking of forming of AN5612 integrated circuit and matrix recovers three-primary colours matrix device, after B-Y, G-Y, three color difference signals of R-Y are handled, the R signal goes out from (7) pin, go into MC1377 (3) pin through R45, C51, the G signal goes out from (8) pin, go into MC1377 (4) pin through R47, C52, the B signal goes out through R49, C53 to go into MC1377 (5) pin from (9) pin

(d) the Phase Alternation Line system chromacoder formed of MC1377, (9) pin output is connected to JK33 modulator socket, R, G, B tristimulus signals are carried out the Phase Alternation Line system coding after, by the compound full television video frequency signal of (9) pin output PAL-60, deliver to modulator,

(e) sound channel, integrated tuner output base band (B.B) signal, JK11 goes into from jack, through triode T11 impedance matching, by the output of T11 emitter-base bandgap grading,, after amplifying, exports the NE592 signal by (7), (8) pin by (14) pin that R118, C111 enter the NE592 integrated package, again after emitter follower T13, T14 isolate, by socket JK22 output 1VP-P base band (B.B) signal, be connected to the IN end of panda sound accompaniment decoder again, by OUT end output audio signal, deliver to modulator again

(f) radio-frequency modulator, input is connected to MC1377 encoder (9) pin, also be connected to sound channel panda sound accompaniment decoder OUT end, the encoded video signal of MC1377 output and the audio signal of sound channel output modulated, and exported radiofrequency signal to closed-circuit television.