Before the overall debugging of the RF duplex, it should be confirmed whether the working frequency of the RF duplex is consistent with the working frequency of the wireless telephone. If there is a significant difference, it should be readjusted and debugged again to avoid burning out the input amplifier circuit.

　　The initial adjustment of RF duplexers is usually carried out at the manufacturer of RF duplexers. After the adjustment is completed, the operating frequency is indicated before leaving the factory. But before using the RF duplexer, if necessary, it can be readjusted according to the actual working frequency. The debugging method is to connect the instrument and connect a 50 Ω terminal false load. The false load and spectrum analyzer should be repeatedly adjusted and swapped, and each adjustment screw should be locked.

　　During the debugging phase of the entire machine, after adjusting the transceiver circuit board, it is necessary to carefully fine tune the RF duplexer to maximize the transmission power and minimize the degradation of transmission and reception sensitivity. During joint debugging, it is necessary to pay attention to a small and gradual adjustment to prevent burning out the satellite TV. Because the operating frequency of RF duplexers is high and it is a distributed parameter that determines its characteristics, it is very sensitive to adjustments; And prevent the best point of the original adjustment from running away during the locking process after the adjustment is completed. Some RF duplexers use self-locking screws, eliminating the need for additional nuts to lock, making debugging more convenient and saving labor costs

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