ADCP-75-214 • Issue 2 • September 2006

4.Re-connect Bias-T with a T adapter. Verify voltage on the T adapter _______ VDC. Normal is 15 VDC.

PDU

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.

4.2Troubleshooting 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 MHU.

•If an infinite resistance reading (sometimes indicated by OL), check to see if MHU is installed or for a discontinuity exists up to the MHU.

•Normal in-band RL should be greater than 18dB. If less than 18dB, check protector, feedline, jumpers and antenna.

•Mark receive and transmit bands to verify correct filtering.

•Check the distance to fault to identify any anomalies on the feedline.

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© 2006, ADC Telecommunications, Inc.