ព័ត៌មានឧស្សាហកម្ម

រៀបចំប្រព័ន្ធទទួលទូរទស្សន៍ផ្កាយរណប

2021-04-23

រៀបចំកប្រព័ន្ធទទួលទូរទស្សន៍ផ្កាយរណប


ឧបសម្ព័ន្ធ ប្រភេទខ្សែ RG6 Jumper គឺល្អសម្រាប់ទូរទស្សន៍ផ្កាយរណបឌីជីថលនិយមន័យខ្ពស់។

 នេះSប្រព័ន្ធទទួលទូរទស្សន៍ផ្កាយរណបមានស្ថានីយ៍បញ្ចូន uplink (ការបញ្ជូន uplink) តួផ្កាយរណប (ឧបករណ៍បញ្ជូនពីផ្កាយរណប) និងកន្លែងទទួលដី (ស្ថានីយ៍ទទួលតំណភ្ជាប់) ។


1) នេះuplink transmitting station can be a fixed large-scale ground station or a mobile ground station. នេះprogram 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) នេះsatellite-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) នេះground 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. នេះabove composition is the basic front-end of the satellite TV receiving system and the cable TV receiving system. composition.

(2) នេះCប្រព័ន្ធទូរទស្សន៍ដែលអាចប្រើបាន (CATV) ត្រូវបានបង្កើតឡើងដោយផ្នែកដែលទទួលផ្នែកមួយផ្នែកខាងមុខផ្នែកខាងមុខឧបករណ៍បញ្ជូនតនិងបណ្តាញចែកចាយ។

1) ទទួលផ្នែក៖ជាចម្បងវាទទួលបានសញ្ញាមីក្រូវ៉េវតាមផ្កាយរណបតាមរយៈការទទួលផ្កាយរណប parabolic ដែលទទួលបានខ្ពស់ទទួលអង់តែន។

2) ផ្នែកខាងចុង៖មានឧបករណ៍បំលែងចរន្តចុះក្រោម (ក្បាលប្រេកង់ខ្ពស់អិលអេប៊ី) និងអ្នកទទួលទូរទស្សន៍ផ្កាយរណប។

នេះfrequency 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. នេះequipment is mainly composed of a low noise amplifier and a down converter. .

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

3) ការបញ្ជូនត្រែង៖ នេះfunction 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.

៤) បណ្តាញចែកចាយ: មុខងាររបស់វាគឺដើម្បីបញ្ជូនសញ្ញាទូរទស្សន៍ដែលមានប្រេកង់ខ្ពស់ដែលផ្តល់ដោយចុងផ្នែកខាងមុខដល់ឧបករណ៍ពុះតាមខ្សែមេហើយបន្ទាប់មកទៅកាន់អ្នកចែកចាយស្ថានីយសម្រាប់ការមើលទូរទស្សន៍របស់អ្នកប្រើប្រាស់។

 

អ៊ីនធឺណេសិនណលផ្តល់ជូននូវគុណភាពដែលអាចទុកចិត្តបានប្រភេទខ្សែ RG6 Jumper ខ្សែកាប សម្រាប់ស៊ីធីវីស៊ីស៊ីស៊ីធីវី។