The C-band uplink signal received by the antenna is amplified, filtered and sent to the uplink receiving equipment; the downlink signal is filtered, amplified and sent to the antenna to transmit to the ground; the signals of the transmitting and receiving channels are isolated by a duplexer, and the three antennas are switched on in time by an RF switch.

The default state of the C downlink RF channel after power up is low power, working state, level output 20dBm~25dBm (downlink RF port 0dBm input), the RF channel after power up is connected to the C roof omnidirectional antenna by default.