Tektronix 2212 User Manual page 40

Digital Storage Displays
SA VE I RECALL Reference Display
You can use the following procedure to save a displayed wave-
form in memory using the SA VE mode, and recall a stored wave-
form from that memory using the RECALL mode:
Step 1. Acquire the waveform to be used as a reference wave-
form by using the previous Store Mode Display proce-
dure.
Step 2. Press the SA VE button to store the displayed waveform
in the reference memory.
A new reference waveform is saved each time the SA VE
button is pressed, and the existing reference waveform
is replaced.
Step 3. When you press the RECALL switch you recall and dis-
play the stored reference waveform on the crt, together
with the waveform already displayed.
The reference waveform remains stored in memory
when you switch to Non-Store mode. You may recall it
at any time the Store mode is active. The reference
waveform is not saved when the oscilloscope is turned
off.
Step
4.
The Reference Position control (= TRace SEParation
control) can be used to position the reference display
vertically. It may be positioned below the level of the
signal it was copied from.
The vertical POSITION controls do not affect the posi-
tion of the reference display after it is saved, but they
do set the base level of the reference at the time it is
copied.
Step 5. The Reference display can be expanded horizontally
along with the active acquisition display when the Hori-
zontal Xl, X10, X50 magnify switch is changed to the
X10 or X50 position.
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