MA REV A
10
AMPLIFER ADJUSTMENT
In most cases the IBA will need very little adjustment. After connecting the coax and
powering up the IBA, the signal levels within the previously surveyed areas should be
checked for adequate RSSI and Signal Quality Equivalent (SQE) levels.
Measurements should be made at the perimeter of the building both inside and
outside. It is important that the RSSI levels measured outside the building remain
close to those measured prior to installation of the IBA.
Both the uplink and downlink overload indicators should remain off. If either indicator
is illuminated, the gain of the appropriate link should be reduced.
If the gain of the amplifier needs adjustment the uplink and the downlink may be
adjusted by means of the step attenuators on the rear of the unit. Attenuation from 0
dB to 28 dB in steps of 4 dB may be inserted by proper selection of the 4, 8 and 16
dB attenuators. If satisfactory cell (or two-way) phone performance is not obtained
when the phone is in close proximity to the interior antenna it may be necessary to
decrease the gain of one or both of the links.
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