User manual

ADCP-75-154 • Issue 3 • August 2006
Page 15
© 2006, ADC Telecommunications, Inc.
PDU DC supply (18-56 VDC with 5A fuse/breaker).
5. Re-connect to original configuration and return to service. PDU should illuminate a green
LED for each active TMA if there are no faults in the system.
6. Check with operators for improved performance.
4.2 Troubleshooting Hints
• If voltage is outside of the normal range, trace it back towards the fault.
• If no resistance or low resistance, check protector, feedline, jumpers and TMA.
• If high resistance, check to see if TMA is installed or for a discontinuity up to the TMA.
• Normal in-band RL should be greater than 14dB. If less than 14dB, check protector,
feedline, jumpers and antenna.
• Mark receive and transmit bands to verify correct filtering.
• Check distance to fault to identify any anomalies on the feedline.
HARD
LINE
PDU