User manual

ADCP-75-154 • Issue 3 • August 2006

Page 14

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.

Typical RL Sweep

4. Re-connect Bias-T with a T adapter. Verify voltage on the T adapter _______VDC.

Normal is 13VDC.

PDU

HARD

LINE

SURGE

PROTECTOR

PDU

HARD

LINE