CM2020 Amplifier - Installation Manual
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Copyright 2011 Cellphone-Mate, Inc. All rights reserved.
5.6 - Automatic Shutdown
If equipped, the CM2020 amplifier includes an
automatic shutdown feature that works in the fol-
lowing sequence:
1. The cellular side (lights 4 and 5 in the diagram
on Page 21) is usually the first side to experi-
ence oscillation. When oscillation is detected
in the uplink and/or downlink, the appropriate
Warning light(s) will begin flashing red and
the Power light (light 3 in the diagram on Page
21) will turn red.
2. If oscillation occurs on the PCS side, lights 1
and/or 2 will blink as appropriate and the
Power light (3) will turn red if it is not already
red because of cellular oscillation.
3. If the problem is not resolved, the affected
side will shut down after 30 seconds. In gen-
eral, the cellular side will oscillate more easily
than the PCS side.
4. The amplifier will wake back up. When this
occurs, the power light will be green. If oscilla-
tion resumes, the lights will flash as previously
described. These 30-second cycles will con-
tinue for 15 minutes or until the problem is
resolved.
5. If the problem is not resolved within 15 min-
utes, the amplifier will shut down (all lights off
except the Power light, which is red) and must
be reset by unplugging it from the power sup-
ply and plugging it back in.
To resolve oscillation, increase the antenna sepa-
ration (Section 3.4) and/or the attenuation (Sec-
tion 5.1).
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