L3Harris Narda SignalShark, User Manual

Page: 85 / 231

Spectrum View
85
In order to be able to view very fast signals with the naked eye (the measurement time
is partly 10 ms), there is a downstream compression for these detectors, which the user
can display as an additional trace.
The compression time is determined by the Scan Count. After the Scan Count has
elapsed, the signal then decays exponentially.
Example:
•
Measurement Time: 10 ms
•
Scan Count: 300
•
Trace: MxP
Over the time of 10 ms x 300 = 3 s, the data of the +Pk (Plus Peak) become
summarized in a Trace (in this case, the maximum values that have occurred during this
time). If the signal would no longer be present after the 3 s, the Trace would slowly fade
away. In this way, short pulses, for example, can be made visible.
Calculated traces:
•
Detector 1: MxP (Maximum of Plus Peak)
•
Detector 2:
– MxR (Maximum of RMS)
– AvR (Average of RMS)
– MnR (Minimum of RMS)
•
Detector 3 (depending on the configuration):
– MnP (Minimum of Minus Peak)
– MxA (Maximum of Average)
– MxS (Maximum of Sample)
Changing general display settings (Display)
Here you can change general display settings such as the zero point of the Y-axis, the range
of the Y-axis or the axis unit (the available settings depend on the current view).
To open the Display menu:
You selected the desired view.
1. Tap the Display button.
The Display menu opens.
2. You can now do the following:
Lmax
Here you can do the following:
•
Set the maximum power level of the graph
•
Set the Ref.L. -> Lmax function On or Off
•
Set the Couple Views function On or Off
•
Select Default Range or Auto Range