ADC ClearGain Dual Inline Tower Mounted Amplifier System Manual de usuario descargar pdf (Pagina 18)

ADCP-75-214 • Issue 2 • September 2006

Page 12

4 TROUBLESHOOTING 4-PORT CLEARGAIN DUAL INLINE DUAL DUPLEX

TOWER MOUNTED AMPLIFIERS

Trouble is visually indicated by LED's or no LED illumination on a specific MHU, swap Bias-T

cables on PDU ports to see if trouble remains or moves (reference Figure 8). See Figure 10 for

possible trouble points.

Figure 10. Tower Mounted Amplifiers

21299-A

MASTHEAD

UNIT (MHU)

FEEDLINE

JUMPERS

ANTENNA

JUMPER

HARD LINE

SHELTER

HARD LINE

TEST

POINT

NOTE: COMMON FAILURE

POINTS ARE THE ANTENNA

AND FEEDLINE JUMPERS/

CONNECTORS.

CHECK IF EXTERNAL JUMPERS

OR SURGE PROTECTORS ARE PRESENT.

IF A SURGE PROTECTOR IS ANYWHERE

BETWEEN THE BIAS-T AND THE MHU

IT MUST BE ABLE TO PASS DC.

ANTENNA

JUMPER

1 2 ... 13 14 15 16 17 18 19 20 21 22 23 ... 27 28

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ADC ClearGain Dual Inline Tower Mounted Amplifier System Manual de usuario Pagina 18