HP 8924C Reference Manual page 178

Chapter 4, Description of Fields
Fields That Begin with the Letter A
Avg Power
NOTE: Under certain conditions, the Average Power measurement will display a power level
measurement when low (or no) signal power is applied to the RF Input! This measurement is
a result of the power detector sensing the Test Set's RF Power (source) when the RF
generator's output port selection is RF Out. Always use the Channel Power measurement
when the RF Power is at a level that will power-control the mobile station to levels below -10
dBm to avoid this condition.
178
This field allows you to choose the CDMA Average Power Measurement, the
CDMA Channel Power Measurement, or the Access Probe Power Measurement.
The Avg Power measurement can only be made on a signal from the RF IN/OUT
connector on the Test Set or an HP 83236 PCS Interface. The power meter must
be zeroed to correct for internal amplitude offsets. See
.
description, on page 339
The following list describes the purpose for each HP 8924C power measurement.
For more detail, refer to the field description for the power measurement you
choose.
Avg Power
•
Avg Power (Average Power) displays the average power measured from all
demodulated "on" power control groups transmitted by the mobile station under test.
The specified amplitude range of this measurement is from -10 dBm to +40 dBm. This
measurement is more accurate than the Chan Power measurement.
Chan Power
•
Chan Power (Channel Power) displays lower level RF power by analyzing the
downconverted IF at the Test Set's DSP analyzer's input. The amplitude range of this
measurement is from -50 dBm to +35 dBm. This measurement is limited to a 1.23
MHz bandwidth.
Acc Prb Pwr
•
Acc Prb Pwr (Access Probe Power) displays access probes from the mobile station
by automatically triggering a power measurement each time the mobile station
registers, performs a mobile station originated call, or performs a mobile station
terminated call. (Access Probe Power will also be displayed when SMS (Short
Message Service) or Authentication procedures are attempted on the Paging channel.
HP-IB Examples
"DISP CTXT;CDMA:TX:POW:MEAS 'Avg Power'"
selects the average power measurement.
"DISP CTXT;MEAS:CDM:AVGP?"
queries the average power measurement.
"DISP CTXT;MEAS:CDM:AVGP:ZERO"
zeroes the average power measurement.
Power Meas field
S:\hp8924c\REFGUIDE\MANUAL\fields.chp