Acquiring and Displaying Waveforms
3–48
TDS 500B, TDS 600B, & TDS 700A User Manual
H Envelope, Average, Hi Res, and Single Acquisition Sequence acquisition
modes and Autosave mode
H Intensified time base
H Record lengths longer than 500 samples
H Interpolation (equivalent time sampling is used instead)
H Vectors when in equivalent time mode (waveforms are displayed as Dots
instead). (To determine under what conditions the oscilloscope normally
interpolates or uses equivalent time, see Selecting Repetitive Sampling on
page 3–25.)
If you select any of these modes before or while InstaVu is on, they will remain
selected in their respective menus, but the oscilloscope will ignore them. It will
put the modes into effect when you turn InstaVu off. If the oscilloscope setup is
not as you expect when you turn InstaVu off, this may be because the oscillo-
scope quit ignoring these InstaVu incompatible modes.
InstaVu mode disallows selection of Math waveforms. If you attempt to select a
math waveform from the MORE menu, the oscilloscope will display an error
message. Either switch InstaVu off and create the math waveform, or select a
channel waveform and continue using InstaVu mode.
InstaVu displays using a persistence display style (see display menu). If you
select Intensified time base, the intensified zone is controlled by Horizontal
Scale and Delay time settings as when InstaVu is off, but the zone is masked by
the persistence display mode and cannot be seen. Turn off InstaVu to display the
intensified zone.
Using FastFrameT (TDS 500B and 700A Models Only)
You can define and enable FastFrame (also called segmented memory). This
feature lets you capture multiple acquisitions in the acquisition memory of a
single channel. Figure 3–28 shows how FastFrame combines the desired
captured records into one larger record. For example, FastFrame would let you
store 10 records of 500 samples each into one record with a 5000 sample length.
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