Fault phenomenon: no power output in the remote machine

Fault phenomenon: no power output in the remote machine

Fault analysis:

1. The power supply of the remote machine is not normal.

2, the coupling input signal of the near end machine is too small, which leads to the failure to open the downlink power amplifier threshold.

3, the optical fiber loss between the near end machine and the remote machine is too large or interrupted, which leads to the failure to open the downlink power amplifier threshold.            4. The radio frequency output level of the light module in remote machine is small (>-20dBm), so that the power amplifier module threshold can not be opened.

5. Parameter setting

Troubleshooting:

1. Check whether the power supply of the remote machine is normal

2, check the fiber loss, and measure the receiving optical power of remote machine transmitter.

3, measure the RF output level of remote machine transmitter (should be more than -20dBm)

4, check whether the power amplifier switch is closed.

Previous:Fault phenomenon: downside standing-wave ratio warning

Next:Fault phenomenon:Light receiving alarm for near end machine