Chapter 4, Description of Fields

Fields

Chan Power

This field allows you to choose the CDMA Channel Power, Average Power, or

Access Probe Power measurements.

The CDMA Channel Power Measurement can be made on a signal connected to the Test Set’s RF IN/OUT or ANTENNA IN connector.

This measurement must be cross-calibrated to the Average Power Meter. See “Calibrating Channel Power Measurements” in the Calibrating the Test Set chapter of the E8285A Application Guide.

An Uncal annunciator will flash below this field when the Channel Power measurement has not been calibrated for the frequency band selected in the RF Chan Std field.

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, and the input frequency range is from 30 MHz to 1000 MHz. This measurement is more accurate than the Chan Power.

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.

GPIB Examples

“DISP CTXT;CDMA:TX:POW:MEAS ‘Chan Power’”

selects Channel Power measurements.

“DISP CTXT;MEAS:CDM:CHAN?”

queries the channel power measurement.

“DISP CTXT;MEAS:CDM:CHAN:CAL”

calibrates channel power measurements (connect the DUPLEX OUT and RF IN/OUT ports before sending this command).

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Agilent Technologies E8285A manual Chan Power, Selects Channel Power measurements, Queries the channel power measurement