Acquiring and Displaying Waveforms
3–46
TDS 684A, TDS 744A, & TDS 784A User Manual
H Envelope, Average, Hi Res, and Single Acquisition Sequence acquisition
modes and Autosave mode
H Delayed 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 3–24.)
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 it when you turn InstaVu off, it may be because it 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.
Using FastFrameT (TDS 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.
Real Time
Fast Frame
Figure 3–28: Fast Frame
