Lab is an extended version of the Waveform
Manager family that adds waveform math to all of the features found in the
Waveform Manager Pro and
Opt-P versions. This package is particularly well suited to
electronic design applications including instrument development, high speed
communication and power system design.
You perform math
operations by defining new waveforms using algebraic expressions.
Waveforms are variables in these expressions. For example, to multiply
two waveforms you would define a new waveform with the expression
variables representing time (t) and frequency (f) make it easy to define new
waveforms from scratch using common trigonometric functions such as
Other functions provide rectangular and triangle wave shapes.
supports double precision floating point arithmetic, so the numerical
performance of most operations is limited only by the resolution, accuracy
and noise of the waveforms you analyze.
Waveform Processing Functions
Waveform processing functions include the following
|Time and Frequency transformation|
|Impedance and reflection coefficient|
|Waveform array reduction|
For more information, download the
User Manual and check out the section: "Measurement
and Analysis|Lab Version|Waveform Math".
Waveform Lab facilitates electronic
design and signal integrity work, enabling you to draw data
from bench instruments such as scopes, network and spectrum analyzers as
well as from simulation programs such as LTSpice into a common display and
analysis environment. Output waveform files to LTSpice for use in
Complex datasets can be exported in S1P or S2P format for import into
Most operations function with either
variable or fixed time/frequency steps, so operations like integrating a
noise density plot on logarithmic frequency intervals to get total noise
voltage are performed easily.
Specialized functions that convert step
response to/from frequency response make it possible to use your sampling
scope as if it were a vector network analyzer for many applications.
Apply low pass filter functions to step response data by transforming to
frequency response, applying the filter function and then transforming back
to step response. Or apply normalization operations normally
associated with network analyzers to remove the effects of scope and probe
from amplifier response measurements.
3D Data reduction
Waveform Lab includes
provisions for analysis of 3D data sets. One group of special
functions operates column-wise across an array of waveforms so that each
sample in the 2D result waveform results from samples at the same position
from each waveform in the array. These functions include:
waveform measurements can also be used in math waveform expressions to
reduce 3D data to 2D. For example the waveform measurement
to a 3D data set of 10,000 records would produce a 2D waveform 10,000
samples long where each sample represents the maximum value found in the
corresponding record in wfm1. To navigate to the source record corresponding
to a feature in the result, right-click the feature in the result and choose
"Find source record".
Waveforms that depend on other waveforms for their
definition are refreshed whenever one of the source waveforms changes.
It is possible to define a waveform that depends on the currently selected
record of a 3D waveform, and updates when the current record is changed.
units are also managed by the program and carried into the result waveform.
For example the product of a voltage and a current waveform would be
expressed in units of "V·A". Conversion factors may be used as part of
such expressions to cause the result to be displayed with desired units.
Wfm1*Wfm2*1.0"W/V·A" would display in
units of "W".
Step response (top left) smoothed (bottom left) and
transformed to the frequency domain, displayed on a log frequency scale
Analysis of an ADC output by subtracting a
best-fit fundamental and performing a windowed FFT on the residual.
Note that the residual contains a significant frequency component near the
fundamental in the latter portion of the record indicating some FM in the
TDR plot of high speed board mounted relay
(left) displayed in terms of impedance (right) using the RhoToZ function.
3D perspective view of a 401 record data
set from a spectrum analyzer. The green and blue waveforms are
ArrayMax and ArrayMin functions applied across the complete data set.