Technical data

Chapter 8 255
CDMA Over Air
Metrics Provided by CDMA Over Air Measurements
CDMA Over Air
measurements while on the same PN offset. In PN Offset Auto mode this
measurement is reset if the PN offset changes or the Reset Metrics button is used. In
PN Offset Manual mode this measurement is reset only if the Reset Metrics button
is used.
Average Amplifier Capacity
Average Amplifier Capacity is the average level of all the valid Amplifier Capacity
measurements while on the same PN offset. In PN Offset Auto mode this
measurement is reset if the PN offset changes or the Reset Metrics button is used. In
PN Offset Manual mode this measurement is reset only if the Reset Metrics button
is used.
Utilization
Utilization is a ratio of the active Walsh codes to the total 128 Walsh codes,
expressed in percent. Even though active control channels such as the pilot are
included in the utilization measurement, utilization is an indication of the traffic that
is being carried by the base station.
For example, a CDMA signal with a pilot, paging, and sync channel, two IS-95
traffic channels, and one eight-wide cdma2000 data channel, would use 18 Walsh
codes. Each control channel would use two Walsh codes, each IS-95 channel would
use two Walsh codes, and the cdma2000 channel would use 8 Walsh codes for a
total or 18 Walsh codes. Eighteen Walsh codes in use out of the 128 total Walsh
codes would result in a utilization of 14%.
Peak Utilization
Peak Utilization is the peak level of all the valid Utilization measurements while on
the same PN offset. In PN Offset Auto mode this measurement is reset if the PN
offset changes or the Reset Metrics button is used. In PN Offset Manual mode this
measurement is reset only if the Reset Metrics button is used.
Average Utilization
Average Utilization is the average level of all the valid Utilization measurements
while on the same PN offset. In PN Offset Auto mode this measurement is reset if
the PN offset changes or the Reset Metrics button is used. In PN Offset Manual
mode this measurement is reset only if the Reset Metrics button is used.