Agilent Technologies E8285A manual Selects the average power measurement

Models: E8285A

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Chapter 4, Description of Fields

Fields

The following list describes the purpose for each Agilent Technologies E8285A 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.

GPIB 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.

Operating Considerations for the Average Power Measurement

The Test Set compensates for internal amplitude offsets by zeroing the power meter when

the Zero field is selected. Average power measurements should be zeroed at least as often as the following conditions arise:

5 °C change in operating temperature

Power cycle

Daily

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Agilent Technologies E8285A manual Selects the average power measurement, Queries the average power measurement