Agilent Technologies 8935 series e6380a manual Pwr Zero, Qual Event

CDMA Measurements - Screens and Control Fields

Control Fields for CDMA Measurements

Pwr Zero

Selecting this field calibrates (zeroes) the average power meter. This operation should be performed immediately before making an average power measurement. This field is only displayed if the average power measurement is selected.

Operating Considerations

The Auto Zero field causes average power to be periodically calibrated when set to Auto. If the Auto Zero field is set to Manual, you must use the Pwr Zero field to zero average power. (See “Auto Zero” on page 153 for more information.)

Screens on which this field is present

CDMA ANALYZER

Q Power Level

This IS-2000 Code Domain display field shows the power (in the lower bar graph) of the currently selected Q (IS-2000) Walsh code.

Screens on which this field is present

COD DOM (Code Domain Analyzer, IS-2000 only): Complex Power measurement.

Qual Event

This field selects a trigger qualifier. The trigger qualifier serves as a precursor to the analyzer’s trigger event. Selecting a trigger qualifier is required when a time-delayed trigger event is desired, or if the trigger signal is externally supplied at the TRIGGER QUALIFIER IN connector.

If a time-delayed trigger is used (see “Trig Event” on page 174), the qualifier starts the delay timer. When the timer expires, a trigger event occurs and a measurement is made.

•None causes the trigger event to be determined solely by the selection in the Trig Event field.

•27 ms is an internally generated clock signal.

•20 ms is an internally generated clock signal.

•80 ms is an internally generated clock signal (default selection).

•2 s is an internally generated clock signal.

•Ampl Lo qualifies a trigger each time the input to the CDMA analyzer rises above − 18 dB ADC FS. ADC FS is displayed when the average power measurement is selected, or when adjusting the Gain

168 Chapter 5

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