Technical data

Chapter 8 259
CDMA Over Air
Interpretation of CDMA Over Air Measurement Results
CDMA Over Air
Pilot Power
If the Pilot Power has varied significantly from previous readings at the same
location, it may indicate the following:
• There has been a change made to the digital gain setting of the Pilot Channel.
• The base station power amplifier has a problem.
• The transmit antenna system has been changed or damaged.
Pilot Ec/Io
A high value of Ec/Io means there is less interference from other base stations and
noise and is an indicator of base station performance. When Ec/Io is mapped, it can
be used to determine coverage quality.
Delta Page Power
If the measured value of Delta Page Power is more than +/-0.5 dB different from
previous measurements at the same location, it may indicate that the digital gain
setting for the Paging Channel has been changed from the intended setting.
Delta Sync Power
If the measured value of Delta Sync Power is more than +/- 0.5 dB different from
previous measurements at the same location, it may indicate that the digital gain
setting for the Sync Channel has been changed from the intended setting.
Delta Quick Page Channel Power
If the measured value of Delta QPCH Power is more than +/-0.5 dB different from
previous measurements at the same location, it may indicate that the digital gain
setting for the QPCH has been changed from the intended setting.
Amplifier Capacity
The Amplifier Capacity metric provides an instantaneous reading of how much of
the amplifier's capacity is currently being used. More meaningful information is
provided by the Peak and Average Amplifier Capacity metrics gathered over a 10 to
15 minute interval.
Peak Amplifier Capacity
If the Peak Amplifier Capacity is greater than 100%, the traffic at this base station
has caused the base station amplifier to exceed its maximum power rating. This is
not desirable as this problem can result in system degradation or damage to the