Lub Connexions RG6 Jumper Cable F-Hom yog qhov zoo tshaj plaws rau cov siab txhais digital TV Satellite TV.
TusSlub tshuab txais TV nyob sab nrauv yog tsim los ntawm uplink kis chaw nres tsheb (uplink kis tau), lub hnub qub xov tooj cua lub cev (xa xov mus rau lub hnub qub) thiab hauv av txais (downlink txais chaw nres tsheb).
1) Tusuplink transmitting station can be a fixed large-scale ground station or a mobile ground station. Tusprogram signal and audio signal are sent by a directional antenna, which is processed and amplified and sent to the satellite transponder. In addition to other uplink stations, the main uplink station has two tasks. One is to provide programs to the stars, and the other is to receive downlink signals from the stars to monitor the quality of the programs and the satellite operating attitude, and randomly send correction instructions to the stars through the uplink station to change the satellites. Adjust the antenna and switching equipment to ensure the normal operation of the system.
2) Tussatellite-borne transponder converts the received uplink signal into a downlink FM signal, which is amplified and transmitted to the ground by a directional antenna.
3) Tusground receiving station will receive the downlink FM signal forwarded by the satellite, and then undergo frequency conversion and demodulation, and then send it to the cable television (CATV) system. Tusabove composition is the basic front-end of the satellite TV receiving system and the cable TV receiving system. composition.
(2) TusCmuaj peev xwm siv TV (CATV) tsim muaj ib feem tau txais, ib sab pem hauv ntej, tshooj pob tw thiab qhov xaib xa tawm.
1) Txais feem:Nws feem ntau tau txais satellite microwave teeb liab los ntawm high-nce parabolic satellite txais lub kav hlau txais xov.
2) Sab Pem Hauv Ntej-kawg:suav nrog down-converter (high-zaus taub hau LNB) thiab satellite TV txais.
Tusfrequency down converter is to reduce the satellite microwave radio frequency signal (C band, the frequency is 3.7~4.2GHz) received by the antenna to the intermediate frequency signal, the frequency is 970~1470MHz. Tusequipment is mainly composed of a low noise amplifier and a down converter. .
Tusfunction of the satellite TV receiver is to restore the satellite TV signal into images and sound with standard TV interface level raugeneral TV viewing.
3) Lub cev pob tw: Tusfunction of the trunk transmission part of the CATV system is to transmit the high-frequency TV signal output by the front-end part to the input port of the system distribution network without distortion, and the output level signal should meet the requirements of the distribution network system. Commonly used trunk lines include coaxial cable transmission and optical fiber cable transmission.
4) Cov xaib xa tawm: Nws txoj haujlwm yog xa cov xov tooj hluav taws xob ntau hauv TV uas tau muab los ntawm lub hauv ntej kom txog kev txaws los ntawm cov kab tseem ceeb, thiab tom qab ntawd mus rau lub chaw faib khoom rau cov neeg siv TV saib.
Connexions Technology muaj cov khoom zoo txhim khu kev qhaRG6 Jumper Cable F-Hom Coaxial Cable rauCATV, CCTV.