Saving Waveforms and Setups
The 2221A Digital Storage Oscilloscope not only provides reference memo
ries for saving digitized waveforms, but also allows you to retain STORE
mode setup configurations.
Saving and Recalling
Waveforms
With the 2221A oscilloscope you can “freeze” a waveform with the touch of
a button. You can also keep a waveform for later reference by using a SAVE
REF memory location. The contents of the SAVE REF memory locations
remain intact when the scope is turned off and can be recalled during a later
session.
Saving the Current Acquisition
One way to quickiy save a waveform is to use the SAVE/CONT button.
H Stepl: Acquire the signal in STORE mode.
I ! Step 2: Press the SAVE/CONT button. The current acquisition stops
and the waveform is “frozen” on screen. {At sweep speeds of 50 ms or
faster a triggered acquisition is allowed to complete before it is saved.)
F I Step 3: Copy the waveform to a SAVE REF memory location if you want
to retain the waveform for later reference. (Refer to the following sec
tion.)
□ Step 4: Press the SAVE/CONT button again to continue with normal
acquisition.
Saving Waveforms in SAVE REF Memory
In the I K acquisition mode you can save up to three waveform displays in
SAVE REF memory. In the 4K mode, because of the greater record length,
you can save only one. Each SAVE REF memory location can hold either a
one- or two-channel acquisition record.
f~1 Step 1: Acquire the signal in STORE mode.
□ Step 2: Select the desired 1K or 4K acquisition mode.
F I Step 3: Press the SAVE REF button underneath the display (Figure
3-41). The current acquisition stops and a display readout appears that
indicates the status of each memory location as either full or empty.
□ Step 4: Press the memory location you want to save to or overwrite, if
you wait more than 5 seconds to choose the memory location, the
oscilloscope will continue with normal acquisition.
2221A User Manual
3-47
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