Design and Implementation of Input Switcher for Satellite Broadcasting Modulator Based on Single Chip Microcomputer
In the design of high-definition uplink systems for radio and television earth stations,the input port of the modulator is often configured with two input ports:one for scrambled stream signals and the other for unscrambled stream signals.Therefore,there is a significant need for a physical switch that can manually and quickly switch the input port of the modulator,allowing for independence from network management system operations.Currently,there are no known physical products with this functionality,both internationally and domestically.This paper presents a design solution for a modulator input switch using an Arduino microcontroller and a Modbus TCP gateway module.The proposed solution has been implemented and demonstrates excellent performance.Furthermore,this design is universal and applicable to all devices that support the SNMP protocol,enabling the creation of physical control devices.It is expected that this paper can provide valuable insights for radio and television earth stations.
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