No Pk/Avg - HP 8920A User Manual

No Pk/Avg

Sensitivity
This field performs two functions:
(peak hold) prevents the Spectrum Analyzer from erasing the previous
Pk Hold
trace each time it sweeps. This causes the traces to 'build-up' on the screen until
, or the MEAS RESET key is selected. This allows the capture of
Off No Pk/Avg
transient signals that are not displayed long enough to view during normal
operation.
through (video averaging) enables the Spectrum Analyzer to display a
Avg 1
trace representing the average of several measurements. The number of samples
used for measurement averaging range from 1 to 100 (see below).
and function identically.
Off
compatibility with earlier firmware and software.
• No Pk/Avg means that peak hold and video averaging are off.
• Pk Hold means that peak hold is on.
• Avg [n] enables video averaging over [n] measurements,
where n = 1, 2, 3, 4, 5, 10, 20, 50, or 100
• Off means that peak hold and video averaging are off.
Operating Considerations
After capturing the desired signal, you can use the HOLD function (press and
release the SHIFT key, then the PREV key) to prevent additional signals from
building-up on the display.
This area performs two functions:
• The upper field selects Normal or High sensitivity for the RF input. The High setting
adds about 6 dB of sensitivity to the ANT IN port for looking at very low level signals.
However, this setting can cause measurements to be uncalibrated (indicated by a mes-
sage on the screen). High sensitivity can also cause high-level AM signals to be dis-
torted.
• The lower field selects the vertical resolution of the display. You can choose from
1 dB, 2 dB, or 10 dB per graticule.
Chapter 21, Spectrum Analyzer Screen
is provided to maintain backwards
Off
Field Descriptions
No Pk/Avg
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