Tektronix 222 Operator's Manual page 43

What the Controls
Do-222 DSO
Operators
SAVEIRECALL
Button-calls up a menu for saving a
current front-panel setup, recalling one of four previously saved
setups, or erasing one or all four of the saved setups. See Sec-
tion
4,
paragraphs
4.21
and
4.22
for operating instructions.
Button
-
displays the TRlG POS control menu for selecting
the trigger position in STORE mode displays. The selected
choice is boxed in the menu. Further presses of the button with
the menu displayed cycle through the menu choices. You may
select the data acquisition window around the trigger position
directly by pressing the menu-select button for the setting you
want (POST, MID, or PRE, see Section 6, para. 6.8). Direct
selection clears the menu from the display.
In NONSTORE mode, the trigger position is always at the sixth
data point of the waveform acquisition regardless of the position
selected in the TRIG POS menu. The acquired waveform data
(expect for the first five data points) will therefore be post trigger
data points (after the trigger event).
MODE
Button-displays the menu for selection of the
acquisition mode. The selected mode is boxed in the menu.
Choose the acquisition mode you want (NORM, ENV, AVG, or
CONT ENV, see Section 6, para. 6.1 0) either by pressing the but-
ton to cycle through the choices or by pressing the menu-select
button next to that choice. ENV and CONT ENV acquisition
modes are in effect for SECIDIV settings of
20
JLS
per division
and slower. At faster SECIDIV settings, the acquisition mode re-
verts to NORM.
MODE Button-toggles the display mode between
STORE and NONSTORE. Both modes are digital acquisition;
the difference is in how the displays are updated.
In STORE mode, traces will remain displayed between trigger
events. In NONSTORE mode, traces are held only to the next
display update (about
30
ms) if not triggered (except in SSEQ
REV MAR 1989 3-17