Keysight N9927-90001 User’s Guide 191
SA (Spectrum Analyzer) Mode
SA Mode Settings
If the Detection method and Averaging type are set to Auto when you enable a
Band/Interval Power marker, the Detection method will change to Average
(RMS) and Averaging type will change to Power average. Other Detection
methods or Averaging type settings will usually cause measurement
inaccuracy. Learn more about Detection method in “Detection Method” on
page 187, and Averaging Type in “Average Type” on page 179.
Summary:
— In Zero span, an Interval Power Marker yields the average power over the
specified time interval.
— In non-Zero span, a Band Power Marker yields the total power over the
specified frequency range.
How to measure Band/Interval Power with a marker
—Press Marker to create or select a Normal or Delta marker to use to
measure Band/Interval Power.
—Then press More
—Then Marker Function
—Then Band/Int Power
—Then Band (or Interval) Span
— Then choose from the following:
—Auto
Measures power over 5% of the displayed span, or ½ graticules.
The Band Span is automatically updated to remain at 5% when you
change the frequency span.
—Man
Enter a frequency or time value using the arrows or the
rotary knob, then press Enter
. Or enter a value using the numeric
keypad and select a frequency or time suffix. The Band Span remains
at the frequency or time value that you set as the span changes.
Frequency Counter at Marker
Available in SA Mode ONLY. Use any existing marker to make highly-accurate
frequency counter readings. For highest accuracy, lock the FieldFox to a stable
external frequency reference. Learn how in “Frequency Reference Source” on
page 530.
When Frequency Counter is ON, the FieldFox uses background sweeps to
zoom on the signal, measure the signal peak with 1 Hz resolution, and display
the frequency of the signal peak in the marker annotation area. The marker
does not move to the signal peak.
When Freq Counter is ON, measurement sweeps are considerably slower.
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