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Chapter 4, Description of Fields
Fields
Acc Prb Pwr
This measurement automatically senses when the mobile station access probe
power level crosses a threshold (approximately -55 dBm/BW) during registration
or call attempts. Although each access probe is measured, only the last access
probe during an access attempt is displayed.
This field is accessed by highlighting the currently displayed power measurement
(listed below) and selecting Acc Prb Pwr from the list of choices.
This measurement must be cross-calibrated in the same manner as Channel Power
measurements. An
Uncal annunciator will flash below this field when the Access
Probe Power measurement has not been calibrated for the frequency band selected
in the RF Chan Std field. See “Calibrating Channel Power Measurements” in the
“Calibrating the Test Set” chapter of the Agilent Technologies E8285A
Application Guide.
The following list describes the purpose of each Agilent Technologies E8285A
power measurement. For more detail, refer to the field description for the power
measurement you choose.
• 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.
•
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 measurement.
•
Acc Prb Pwr
Acc Prb Pwr (Access Probe Power) displays access probe power transmitted 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 Example
“CDMA:TX:POW:MEAS ‘Acc Prb Pwr’“
selects the Access Probe Power measurement.