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Next Generation
Signal Enhancement
9.4 Trouble shooting
During post installation or subsequent period, some of the peculiar
situation may be observed, some of them are discussed below:
Conditions
Possible Reasons & Solutions
LED, s do not glow
after the Repeater is
switched ON.
1 Check the power adaptor and the AC power socket.
2 Please note that the AC mains has to be within the
range 100 to 240V.
3 Check for the DC voltage of adaptor.
Signals are not
amplified after
completing the
installation
1. Check the AC power cord and make sure the
power switch is ON.
2. Check all the connectors of the repeater system
for proper connections. The “BTS” connector has
to be connected to donor antenna, and the “MS”
connector has to be connected to server antenna.
3. The poor isolation between donor and server
antenna will cause system oscillation and it may
damage the amplifier of the repeater
. It is to note
that the repeater gain should be at least 15 dB
lower than the antenna isolation.
The system
performed well in the
beginning but after
few days the
performance has
degraded.
1. The received signal level from the base station
might have degraded due to environmental
changes such as new building construction and so
on. If so:
a. Try to re-align the donor antenna towards the
base station
b. Adjust the gain attenuation of Down link
direction
c. Relocate the donor antenna to solve the
problem
d.
RF Cable problem:
Check the RF cable for
physical damage by rats etc. Also check for
sharp bands or RF cable pressed. Under
these conditions, RF signal losses could have
increased. If so, replace RF cable.
e.
Indoor structural change:
The signal level
will vary according to the interiors. Look for
any interior changes subsequent to the
repeater installation or site survey. If so, adjust
the gain of repeater or re-align the server
antenna without affecting the existing
coverage.
