Technical data

254 Chapter 8
CDMA Over Air
Metrics Provided by CDMA Over Air Measurements
CDMA Over Air
poor signal quality and tell you if it is caused by low Ec or high Io. This helps you
quickly resolve coverage versus interference issues.
Delta Page Power
Delta Page Power is the amplitude difference between the Paging Channel and Pilot
Channel, expressed in dB. The transmit power of the Paging Channel is constant and
can be set at a value relative to the Pilot Power. A common value is -4 dB relative to
the Pilot. It is important to know what the intended settings are for each carrier and
sector of your base station.
Delta Sync Power
Delta Sync Power is the amplitude difference between the Sync Channel and Pilot
Channel, expressed in dB. The transmit power of the Sync Channel is constant and
may be set at a value relative to the Pilot Power. A common value is -10 dB relative
to the Pilot. It is important to know what the intended settings are for each carrier
and sector of your base station.
Delta Quick Page Channel Power
Delta Quick Page Channel (QPCH) Power is the amplitude difference between the
Quick Page Channel and Pilot Channel, expressed in dB. The QPCH is a bursted
channel and is not on all the time. In order to capture the level of the QPCH, the
statistic measures and holds the peak level of the QPCH. Until a QPCH has been
measured, the value will be dashes. When “on”, the level of the QPCH is constant
and is set at a value relative to the Pilot Power. The QPCH digital gain level can be
set to 2, 1, 0, -1, -2, -3, -4, and -5 dB relative to the Pilot. It is important to know
what the intended settings are for each carrier and sector of your base station.
Amplifier Capacity
Assuming the Amplifier Capacity parameters are set properly, the Amplifier
Capacity measurement is an estimate of the amount of power amplifier capacity that
is being used, expressed in percent of maximum. When an amplifier is transmitting
at maximum output power, it is said to be at 100% of its capacity. For example, an
amplifier with a maximum output power of 12 watts would be at 50% of capacity
when transmitting 6 watts and at 100% of capacity when transmitting at 12 watts.
The percentage of amplifier capacity increases as the number or level of the traffic
channels increase.
Peak Amplifier Capacity
Peak Amplifier Capacity is the peak level of all the valid Amplifier Capacity