Troubleshooting - ADC ClearGain User Manual

ADCP-75-154 • Issue 3 • August 2006
4.1

Troubleshooting

1. Observe and record PDU LED status. Disable or disconnect RF from BTS. Remove any
surge protectors. Disconnect Bias-T from the antenna feedline/hardline/jumper/protector.
2. Multimeter checks:
a. Measure voltage on the Bias-T _______ VDC. Normal is 13VDC.
b. Measure resistance of the feedline _______ Ohms. Normal is High or Very high Ω
(KΩ/ΜΩ).
3. Antenna/cable analyzer checks. Measure the in-band RL/VSWR of the system
_______dB or ratio. Check distance to Fault for anomalies.
4. Re-connect Bias-T with a T adapter. Verify voltage on the T adapter _______VDC.
Normal is 13VDC.
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© 2006, ADC Telecommunications, Inc.
HARD
LINE
SURGE
PROTECTOR
HARD
LINE
0
17
dB
Typical RL Sweep
PDU
PDU