ADC ClearGain Dual Inline Tower Mounted Amplifier System - Manual (Page 19)

ADCP-75-214 • Issue 2 • September 2006
Page 13
© 2006, ADC Telecommunications, Inc.
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 15 VDC.
b. Measure resistance of the feedline _______ Ohms. Normal is High or Very high
Ω
(K
Ω/ΜΩ).
3. Antenna/cable analyzer checks. Measure the in-band RL/VSWR of the system ______ dB
or ratio. Check distance to Fault for anomalies.
PDU
FEED LINE
PDU
FEED LINE