Creating Math Waveforms
CSA8000B & TDS8000B User Manual 3- 103
The key points that follow describe considerations for creating math waveforms
that best supports your data-analysis tasks.
How to Create. You create math waveforms when you create a math expression.
You do so by applying numerical constants, math operators, and functions to
operands, which can be channel, waveforms, reference waveforms, measure-
ments (scalars), or fixed scalars. You can display and manipulate these derived
math waveforms much like you can the channel and reference waveforms (see
Operations on Math Waveforms on page 3--107).
Some examples of typical math waveforms follow.
Table 3- 8: Math expressions and the math waveforms produced
To... Enter this math expression... and get this math waveform...
...normalize a waveform ... ...shifted and scaled to fit a std. template
CHAN1
Source waveform
1.6V
0.8V
(C1 -- Meas1)/ Meas2,
where
C1 is waveform shown left
Meas1 = Low of C1
Meas2 = amplitude of C1
1.05V
1.00V
0.95V
+0.05V
0.00V
--0.05V
Normalized math waveform
...simulate ac coupling and integrate ... ...DC component removed before integration
CHAN1
Source waveform
5.0 V
1.0V
Intg(C1--Meas1),
where
C1 is waveform shown left
Meas1 is set to take the Mean of C1 -- 3 V
AC integration math waveform
+3V
Sources. Math Waveforms can incorporate the following sources:
HChannel waveforms
HReference waveforms
HMeasurement scalars (automated measurements) that measure channel or
reference waveforms in any time base
HFixed scalars that you enter as numerical constants in expressions
Keys to Using