Ama-Connexions RG6 Jumper Ikhebula F-Uhlobo ilungele incazelo ephezulu ye-digital Satellite TV.
I-Sisistimu yokwamukela i-satellite isakhiwa yisiteshi sokudlulisa se-uplink (ukudluliswa kwe-uplink), umzimba we-satellite stellar (i-transponder ethwalwa nge-satellite) kanye nokuthola phansi (isiteshi esamukela i-downlink).
1) I-uplink transmitting station can be a fixed large-scale ground station or a mobile ground station. I-program 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) I-satellite-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) I-ground 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. I-above composition is the basic front-end of the satellite TV receiving system and the cable TV receiving system. composition.
(2) I-CUhlelo lwethelevishini olukwaziyo (i-CATV) lwakhiwe ngengxenye etholayo, ingxenye engaphambili, ukudluliselwa kwesiqu kanye nenethiwekhi yokusabalalisa.
1) Ukuthola ingxenye:It ikakhulukazi ithola amasathelayithi ama-satellite microwave ngokusebenzisa ukuzuza okuphezulu kwe-satellite okwamukela ama-antenna.
2) Ingxenye engaphambili:siqukethe i-down-converter (i-high-frequency head LNB) nesamukeli se-satellite TV.
I-frequency 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. I-equipment is mainly composed of a low noise amplifier and a down converter. .
I-function of the satellite TV receiver is to restore the satellite TV signal into images and sound with standard TV interface level ngobageneral TV viewing.
3) Ukudluliselwa kwesiqu: I-function 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) Inethiwekhi yokusabalalisa: Umsebenzi wawo ukuhambisa isignali ye-TV ephezulu kakhulu enikezwe ukuphela kwangaphambi kwesihlukanisi ngomugqa oyinhloko, bese kuba ngumhambisi wokugcina wokubuka kwabasebenzisi be-TV.
IConnexions Technology inikeza ikhwalithi ethembekileRG6 Jumper Ikhebula F-Uhlobo Ikhebula le-Coaxial ngobaI-CATV, i-CCTV.