4TROUBLESHOOTING
Trouble is visually indicated by LED's or no LED illumination on a specific MHU, swap
ANTENNA
JUMPER
FEEDLINE
JUMPERS
HARD LINE
NOTE: COMMON FAILURE
POINTS ARE THE ANTENNA
AND FEEDLINE JUMPERS/
CONNECTORS.
HARD LINE
SHELTER
TEST
POINT
CHECK IF EXTERNAL JUMPERS
OR SURGE PROTECTORS ARE PRESENT.
IF A SURGE PROTECTOR IS ANYWHERE
BETWEEN THE
IT MUST BE ABLE TO PASS DC.
ANTENNA
JUMPER
MASTHEAD UNIT (MHU)
Figure 10. Tower Mounted Amplifiers
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© 2006, ADC Telecommunications, Inc.