Agilent Technologies E8285A manual Averages, Avg Power

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.

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