Operating Basics
3. Select Referen
ce from the Waveform options.
4. Select On under Reference to display the reference waveform. The reference
waveform can be:
the last used reference waveform (if not available, no reference waveform
will be shown)
the envelope waveform (if the persistence function Envelope is on)
5. Or, select Recall… to recall a saved waveform (or waveform envelope) from
memory and us e it as a reference waveform.
6. Or, select New… to open the NEW REFERENCE menu and select the width
of an additional envelope to be added to the momentary waveform.
7. Press Enter to store the momentary waveform and display it permanently for
reference. The display screen also show s the actual waveform.
NOTE. To recall a saved waveform from memory and use it as a reference
waveform, read about recalling screens with associated setups. (See page 74.)
Reading a reference waveform with an envelope. Following is an example of a
reference waveform with an additional envelope of ±2 pixels. 1 vertical pixel
THS3000 Series Oscilloscopes User Manual 45
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