D-MBR 3707-3708 PS NFPA CLASS A SIGNAL BOOSTER
PRODUCT DESCRIPTION AND USER’S MANUAL
Cobham Wireless – Coverage
Date: 17-Jan-16
www.cobham.com/wireless
Doc. No.00060CDUM Rev. 1.1 Page | 65
Alarm Fault and most probable cause and Recommendation
Temperature
Description: Booster
temperature is exceedingly high due to excessive
external heat.
Recommended action: Check the Booster case for external causes (sun,
hot environment, air flow is blocked). Eliminate the reason for excessive
heat.
Too Low
Description: Signal from the Donor antenna (DL) is too low - relatively to
the desired output signal configured by the user.
Recommended action:
Check the Donor/Base connections and antenna position. Check the signal
level of the Donor/Base antenna.
If the alarm is still raised, then you can raise, the value of the DL Output
Threshold Delta[dBm] as needed
(PAmp)
Current
Description: Power Amplifier current is not within limits (too high or too
low). If the Mute option is enabled, then this is not a fault since it indicates
low Power Amplifier current caused by the mute.
Recommended action: Check the LEDs status in the Booster and Contact
Cobham Wireless service support.
RSSI
Description: Generates an alarm when a high
donor
input signal causes
system gain reduction
VSWR
Description: This alarm is triggered when the return loss of the Downlink or
Uplink antenna or cable connection exceed the allowed limit.
This alarm provides an indication of the status of the cable/antenna
connected to the antenna. If a cable/antenna is defective, the VSWR is
decreased and the alarm is triggered.
Recommended action: Check the cable.
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