User's Manual

EMS Wireless Operator’s Manual
MirrorCell II CDM 812, CDM1912 Series
608112-1, Rev C
39
Parameter Specification
Operating
Temperature
-25 to 50 C.
Storage
Temperature
-40 to 75 C
Enclosure NEMA 4 (Weatherproof)
Table 6: MirrorCell

II Environmental Specifications
9.0 Troubleshooting, Maintenance and Parts Replacement
9.1 Troubleshooting:
A chart of troubleshooting procedures is shown in Table 7 below.
PROBLEM POSSIBLE CAUSE SOLUTION
LED Power Supply Module is
not lit
1. Unit not turned on
2. No power to unit
3. Module failure
4. Input AC or DC wiring is
faulty.
1. Plug in/turn on unit
2. Restore power to unit
3. Replace module
4. Rewire/repair power source to
repeater.
LED on power supply module
is lit but cannot login to the
repeater
1. Software emulation program
is not set properly
2. Software emulation program
is not working properly
3. Cables not functioning
properly
4. Bad Channelizer
1. Verify program is set properly
2. Verify program is working
properly; replace if necessary
3. Replace cable
4. Replace Channelizer module
Poor reverse signal quality;
forward signal quality looks
fine
Excessive noise contribution to
BTS because gain set too high
Reduce repeater gain setting
Output power too low on
forward link
1. Receiving too low of a
signal from donor site
2. Gain not set correctly
1. Verify adequate signal is
received; adjust donor
antenna if necessary
2. Reset gain
Receiving sufficient signal
strength but too much
interference to make a call
Repeater goes into oscillation
because of insufficient antenna
isolation
1. Improve antenna isolation:
 Further separate antennas
 Mount a shield between
antennas
2. Reduce repeater gain