Using Features for Advanced Applications
TDS 500B, TDS 600B, & TDS 700A User Manual
3–171
clipped portion. Also, the automated measurement Pk-Pk will display a clipping
error message if turned on (see To Take Automated Measurements on
page 3–169).
If your derivative waveform is clipped, try either of the following methods to
eliminate clipping:
Reduce the size of the source waveform on screen. (Select the source channel
and use the vertical SCALE knob.)
Expand the waveform horizontally on screen. (Select the source channel and
increase the horizontal scale using the horizontal SCALE knob.) For
instance, if you display the source waveform illustrated in Figure 3–95 on
page 3–169 so its rising and falling edges are displayed over more horizontal
divisions, the amplitude of the corresponding derivative pulse will decrease.
Whichever method you use, be sure Zoom is off and the zoom factors are reset
(see Using Zoom below).
Once you have your waveform optimally displayed, you can also magnify (or
contract) it vertically and horizontally to inspect any feature. Just be sure the
differentiated waveform is the selected waveform. (Press MORE, then select the
differentiated waveform in the More main menu. Then use the Vertical and
Horizontal SCALE knob to adjust the math waveform size.)
If you wish to see the zoom factor (2X, 5X, etc.), you need to turn zoom on:
press ZOOM ➞ ON (side). The vertical and horizontal zoom factors appear on
screen.
Whether zoom is on or off, you can press Reset Zoom Factors (side) to return
the zoomed derivative waveform to no magnification.
Waveform Integration
The Advanced DSP Math capabilities of the TDS Oscilloscope include
waveform integration. This capability allows you to display an integral math
waveform that is an integrated version of the acquired waveform. This section
describes how to setup the oscilloscope to display and measure integral math
waveforms.
Integral waveforms find use in the following applications:
Measuring of power and energy, such as in switching power supplies
Characterizing mechanical transducers, as when integrating the output of an
accelerometer to obtain velocity
Using Zoom
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