Keysight Technologies FieldFox A Series User Manual page 232

RTSA (Real-Time Spectrum Analyzer) Mode—Option 350 (CPU2 Only)
RTSA Mode Settings
232
— Real-time Spectrum
Use real-time spectrogram to quickly display measurements. Refer to
Figure 10-4 on page
In all three spectrum measurements, there are four available traces
for representation of the real-time spectrum.Density Spectrum
(Histogram) FM Signal with 1 MHz FM Deviation & 400 Hz FM Rate
The signal is displayed as a real-time spectrum.
234.
Keysight N9927-90001 User's Guide