Display Waveform or Trace Data
5.
Average: Averages all points in each
interval.
6.
–Peak: Uses the lowest amplitude point
in each interval.
Spectrogram Display
The spectrogram display is particularly useful for monitoring slowly-changing RF phenomena. The x-axis represents
frequency, just like the typical spectrum display. The y-axis represents time. Color indicates amplitude.
Spectrogram slices are generated by taking each spectrum and
fl
ipping it on its edge so that it is one pixel row tall, and then
assigning colors to each pixel based on the amplitude at that frequency with the cold colors of blue and green representing
low amplitude, and the hotter colors of yellow and red indicating higher amplitude. Each new acquisition adds another slice at
the bottom of the spectrogram, and the history moves up one row.
When acquisitions are stopped, you can navigate through the history of the spectrogram by pressing the side menu slice
control and turning the
Multipurpose a
knob. When acquisitions are stopped and the spectrogram is displayed, the
spectrogram slice trace is displayed as the Normal spectrum trace.
To use the spectrogram feature, push
Spectrogram
from the RF Menu to bring up the related side menu.
Spectro-
gram
1.
Push
Display
to
On
to start the spectrogram.
Display
On
| Off
2.
To review each spectrum captured in
the spectrogram, push
Run / Stop
to
stop acquiring RF acquisitions. Turn
Multipurpose a
.
Slice
(Normal)
(a) -45
120
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