ADC ClearGain Dual Inline Tower Mounted Amplifier System Manual de usuario descargar pdf (Pagina 23)

ADCP-75-214 • Issue 2 • September 2006

Page 17

4.5 Return Loss Sweep Guide

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RL dB

v1 v2 v1 v2

18270-A

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RL dB

v1 v2 v1 v2

RETURN LOSS SWEEP GUIDE FOR THE RECEIVE SECTION OF THE MHUs.

GOOD BAD

RESISTANCE LOOKING INTO THE FEEDLINE SHOULD INDICATE HIGH OR INFINITE OHMS.

GOOD BAD

NORMAL IN-SYSTEM SWEEP. TYPICAL. DEGRADATION FROM NORMAL SYSTEM SWEEP.

RL IS STILL GOOD IN RX BAND.

RECOMMEND CONNECTOR/LINE/ANTENNA CHECKS

DURING NEXT SCHEDULED MAINTENANCE PERIOD WHEN

TOWER CREW AVAILABLE.

ANTENNA PORT: TERMINATED WITH 50 OHM LOAD.

"PERFECT ANTENNA" < 50 OHM LOAD >

ANTENNA PORT: ANTENNA CATASTROPHICALLY

FAILED "OPEN".

ANTENNA PORT: ANTENNA CATASTROPHICALLY

FUSED "SHORT".

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ADC ClearGain Dual Inline Tower Mounted Amplifier System Manual de usuario Pagina 23