Keysight N9927-90001 User’s Guide 255
IQ Analyzer (IQA) – Option 351 (CPU2 Only)
Using Markers (IQA)
Noise Markers can be used like regular markers. A Noise Marker is
distinguished from a regular marker by (
1Hz
) after the marker readout value.
Learn more about regular markers in
“All about Markers” on page 446
How to measure Noise with a marker
— Press
Marker
to create or select a Normal or Delta marker to use to
measure Noise.
— Then
More
.
— Then
Marker Function
— Then
Noise
.
Band/Interval Power Marker
A Band/Interval Power marker—available in IQA and SA Modes—integrates the
power that is measured over several adjacent data points. The range of points
being measured is displayed with vertical posts around the marker. This Band
Span value is selectable.
This feature is very similar to a channel power measurement (see SA chapter,
“Channel Power (CHP)” on page 192
).
When the IQA is set to a waveform measurement, the marker is referred to as
an Interval Marker because it averages power over a specific time interval. In
this case the range is specified as the Interval Span.
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 Span
(Spectrum) or
Interval/Span
(Waveform)
— Then choose from the following:
—
Auto
Measures power over 5% of the displayed span, or ½ graticule.
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.
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