Page 1
ScopeMeter192/196/199 Manual Supplement
Using Waveform Math Functions
When adding, subtracting, or multiplying the input A and
input B waveform, the test tool will display the
mathematical result waveform and the input A and input B
waveforms.
A versus B provides a plot with input A on the vertical axis
and input B on the horizontal axis.
The math functions perform a point-to-point operation on
waveforms A and B.
To use a math function, do the following:
1
2
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Printed in the Netherlands
Display the
Open the Waveform Options
menu.
SCOPE
key labels.
3
4
5
The sensitivity range of the mathematical result is equal to
the sensitivity range of the least sensitive input divided by
the scale factor.
Jump to Waveform: and Select
Mathematics... to open the
Mathematics menu.
Select Function: A+B, A-B, AxB or
A vs B.
Select a scale factor (not for A vs B)
to fit the mathematical result
waveform onto the display, and
return.
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Cursor Measurement Readings On Math
Waveforms
Cursor measurements on a A*B Math waveform gives a
reading in Watts if input A measures (milli)Volts and input
B measures (milli)Amperes.
For other cursor measurements on a Math waveform
amplitude no reading will be available if the input A and
input B measurement unit are different.
Making Rise Time Measurements
To measure rise time, do the following:
1
From scope mode, display the
cursor key labels.
4
5
6
The reading shows the rise time from 10%-90% of the
trace amplitude.
Move the upper cursor to 100% of
the trace height.
A marker is shown at 90%.
Highlight the other cursor.
Move the lower cursor to 0% of the
signal height. A marker is shown
at 10%.
2
3
Press to highlight (rise time).
Observe that two horizontal
cursors are displayed.
If only one trace is displayed,
select MANUAL or AUTO (this
automatically does the steps 4 to
6).
For multiple traces select the
required trace A, B, or M (if a Math
function is active).
Risetime Measurement
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