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S:\agilent\e8285\REFGUIDE\MANUAL\fields.chp
Chapter 4, Description of Fields
Fields
Averages
This field sets the number of power control groups (gated-on power periods) that
will provide CDMA gated power measurement. this field is displayed when Main
is selected in the
"Controls (CDMA Gated Power)" field on page 211
GPIB Examples
“DISP CGP;CDMA:GPOWer:NAVG 100”
displays the CDMA GATED POWER screen and sets the Num Averages field to
100 averages.
Operating Considerations for the Average Power Measurement
When a mobile station is operating in variable data rate transmission mode, the
RF power is gated-on during randomized 1.25 ms periods. During a CDMA gated
power measurement the Test Set analyzes an ensemble of gated-on periods
referred to as power control groups. the number of power control groups used to
calculate an ensemble average is set in the
Num Averages field.
Screens Where Field is Present
CDMA GATED POWER
Avg Power
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. The power meter must be zeroed to correct for internal amplitude
offsets. See
Power Meas field description, on page 341.
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.