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168 Chapter 5
C:\Spk\Ref\RefGuideRevE\CdmascrnE2.fm
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