Tektronix RSA6100A Series, Help Manual

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General Signal Viewing > DPX Spectrum DPX Primer
Figure 18. Grid showing cell counts after 50 waveforms. For each column, the sum of z-axis values is 50.
Figure 19. Grid after converting occurrence counts to percent density values. The sums of the cell density
measurements within each column are all 100%.
Measuring Density with Markers
Hit counts are cleared after every frame update, as long as Persistence is not turned on. The density
value for any pixel is simply the percent of time it was occupied during the most recent 50 ms frame.
Markers can be used to see the Density value for one or more individual points on the screen, enabling
measurements of the signal density at any interesting point in the DPX Spectrum display.
In Figure 20, Wireless LAN signals are analyzed in the presence of a Bluetooth radio signal in the 2.4 GHz
ISM band.
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RSA6100A Series Real-Time Spectrum Analyzers Help