Keysight N9927-90001 User’s Guide 425
Interference Analyzer (SA Mode) – Option 236
Spectrogram and Waterfall Displays
Averaging
Averaging can be enabled on the underlying measurement. Press Meas 4 then
Average Type
. Learn more in “Average Type” on page 179.
Mode Preset
Mode Preset resets ONLY the Spectrogram and Waterfall display settings. It
does not reset the measurement settings.
—Press Preset
—Then Mode Preset
Waterfall Display
The live trace is always drawn on a Waterfall display. Older trace records scroll
up from the displayed trace and eventually off the screen. Because of this,
locate the live trace on the bottom of the screen using the scale and reference
settings. Learn how in “Scale and Units” on page 153.
Figure 17-2 Waterfall display- moderate angle- with time markers 1 minute apart.
The following settings all contribute to the sweep time of an individual trace,
and therefore, the total elapsed time that can appear on the screen in Waterfall
display:
— Frequency Range. Learn more in “Frequency Range” on page 148.
— Resolution BW and Video BW. Learn more in “Resolution Bandwidth (Res
BW)” on page 165 and “Video Bandwidth (Video BW)” on page 166.
— Sweep Time (Acquisition). Learn more in.“Sweep Acquisition” on page 169
Although this document refers to past traces as ‘records’ these traces are
not saved. They are only drawn on the FieldFox screen. See “Record
Playback Example (SA Only)” on page 436 for how to save traces.
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