Viunganishi RG6 Jumper Cable F-Aina ni bora kwa ufafanuzi wa hali ya juu wa Televisheni ya Satelaiti ya dijiti.
TheSmfumo wa kupokea Televisheni ya angani unajumuisha kituo cha kupitisha uplink (uplink transmitter), mwili wa nyota wa setilaiti (transponder inayosafirishwa kwa setilaiti) na upokeaji wa ardhi (kituo cha kupokea chini).
1) Theuplink transmitting station can be a fixed large-scale ground station or a mobile ground station. Theprogram 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) Thesatellite-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) Theground 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. Theabove composition is the basic front-end of the satellite TV receiving system and the cable TV receiving system. composition.
(2) TheCmfumo wa runinga (CATV) unajumuisha sehemu ya kupokea, sehemu ya mbele, usambazaji wa shina na mtandao wa usambazaji.
1) Kupokea sehemu:Inapokea ishara za satelaiti za microwave kupitia njia ya juu ya kupata satelaiti inayopokea antena.
2) Sehemu ya mwisho-mbele:inakuwa na kibadilishaji cha chini (kichwa cha masafa ya juu LNB) na mpokeaji wa Runinga ya satellite.
Thefrequency 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. Theequipment is mainly composed of a low noise amplifier and a down converter. .
Thefunction of the satellite TV receiver is to restore the satellite TV signal into images and sound with standard TV interface level kwageneral TV viewing.
3) Uhamisho wa shina: Thefunction 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) Mtandao wa usambazaji: Kazi yake ni kusambaza ishara ya runinga ya hali ya juu iliyotolewa na mwisho wa mbele kwa mgawanyiko kupitia laini kuu, na kisha kwa msambazaji wa kituo kwa utazamaji wa Runinga ya watumiaji.
Teknolojia ya viunganisho hutoa ubora wa kuaminikaRG6 Jumper Cable F-Aina Coaxial Cable kwaCATV, CCTV.