Error description 237-1301B

Error message

1301B UM: FO signal weaker than minimum value CC%2 %1 (value=-%4dB)

Cause of error

- The signal strength of the fiber optic connection (fiber optic cable to the UM converter) has fallen below a permissible minimum value

Error correction

- Check the fiber optic connection:
- Is the green LED on?
- Is the optical fiber plug fully engaged?
- Is the tip of the optical fiber clean?
- Ensure the proper bend radius
- Exchange the optical fiber