11
Automatic Shutdown
SureCall boosters that have automatic shutdown work in the following way:
1. The cellular side (LEDs 4 and 5) is usually the first side to experience
oscillation. When oscillation is detected in the uplink and/or downlink, the
appropriate red Warning LEDs flash and Power (LED 3) turns red.
2. If oscillation occurs on the PCS side, LEDs 1 and/or 2 blink as appropriate
and Power (LED 3) turns red due to cellular oscillation.
3. If the problem is not resolved, the affected side shuts down after 30 sec-
onds. In general, the cellular side oscillates more easily than the PCS side.
4. The booster wakes up and Power (LED 3) turns green. If oscillation re-
sumes, the LEDs flash as described previously. These 30-second cycles
continue for 15 minutes or until the problem is resolved.
5. If the problem is not resolved within 15 minutes, the booster shuts down
automatically (all LEDs OFF except Power, which is red) and must be reset
by unplugging the booster from the power supply and plugging it back in.
6. To resolve oscillation, increase antenna separation and/or the attenuation.
If you Want to Improve Coverage
• Find a location that receives a stronger signal and relocate the outside
antenna to that location.
• Increase the distance between the outside and inside antennas.
Be sure your signal booster’s dB gain is turned up to maximum gain on each
dial (see page 9).
LED
5
6
AWS 2100
Uplink
Power
OFF = normal operation.
ON = AWS uplink warning.
Power off booster immediately.
Green ON or blink = booster receiving power.
OFF = booster not receiving power
Red ON = oscillation has occurred for longer
than 15 minutes and the booster is shutting
down
Designation
Description
