Ṣiṣeto aEto gbigba TV Satẹlaiti

Awọn Connexions RG6 Jumper Cable F-Iru jẹ apẹrẹ fun asọye giga TV Satẹlaiti oni-nọmba.

 AwọnSeto gbigba TV ti satẹlaiti jẹ kiko ibudo gbigbejade uplink (gbigbe uplink), ara irawọ satẹlaiti kan (onitẹjade ti o gbe satẹlaiti) ati gbigba ilẹ (ibudo gbigba isalẹ isalẹ).

1) Awọnuplink transmitting station can be a fixed large-scale ground station or a mobile ground station. Awọnprogram 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) Awọnsatellite-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) Awọnground 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. Awọnabove composition is the basic front-end of the satellite TV receiving system and the cable TV receiving system. composition.

(2) AwọnCeto tẹlifisiọnu ti o ni agbara (CATV) jẹ ẹya apakan ti ngba, apakan opin-iwaju, gbigbe ẹhin mọto ati nẹtiwọọki pinpin kan.

1) Gbigba apakan:O kun gba awọn ifihan makirowefu satẹlaiti nipasẹ ere giga gbigba awọn eriali parabolic satẹlaiti.

2) Apakan iwaju-opin:ni oluyipada isalẹ (ori igbohunsafẹfẹ giga LNB) ati olugba TV satẹlaiti.

Awọnfrequency 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. Awọnequipment is mainly composed of a low noise amplifier and a down converter. .

Awọnfunction of the satellite TV receiver is to restore the satellite TV signal into images and sound with standard TV interface level fungeneral TV viewing.

3) gbigbe ẹhin mọto: Awọnfunction 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) Nẹtiwọọki pinpin: Iṣẹ rẹ ni lati gbejade ifihan agbara igbohunsafẹfẹ giga TV ti a pese nipasẹ opin iwaju si pipin nipasẹ laini akọkọ, ati lẹhinna si olupin kaakiri fun wiwo TV awọn olumulo.

 

Imọ-ẹrọ Connexions nfunni ni didara igbẹkẹleRG6 Jumper Cable F-Iru Okun Coaxial funCATV, CCTV.