Fault phenomenon: downside standing-wave ratio warning

Fault phenomenon: downside standing-wave ratio warning            

Fault analysis: the power amplifier of the remote device detects that the standing-wave ratio of the cable exceeds the setting threshold of standing-wave ratio .            

Troubleshooting:            

1. Check whether the setting of standing-wave ratio threshold is correct (standing wave threshold is 1.5)            

2. Use the standard load to judge the fault points of each cable and module from the internal power amplifier output of device to the radio frequency port of device.         

3, use standing wave tester to judge the fault point and fault location of antenna system;

4. If it is confirmed that the antenna has big standing-wave ratio, the antenna needs to be replaced. 

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