Tektronix 222 Operator's Manual page 37

What the Controls Do-222 DSO Operators
@
SELECTICOUPLING
Button
-
selects CH 1 to respond to
the vertical control changes. The selected channel has its
VOLTSIDIV readout boxed in the display.
A second press after the channel is selected calls up the control
menu needed to select the CH 1 input coupling (DC, AC, GND,
and CHI OFF). While the menu is displayed, further presses of
the button cycle through the coupling choices except OFF. The
CHI OFF choice must be made using the menu-select button. If
the channel display is turned off, the word "OFF" appears in
place of the VOLTSIDIV readout for that channel. The effect of
the vertical controls shifts to channel 2 at the time channel 1 is
turned off as indicated by the VOLTSIDIV readout for channel 2
being boxed.
@
SELECTICOUPLING
Button-same as for the
(CH
but-
ton, but for channel 2.
@
VERTICAL POSITION and Variable VOLTSIDIV Control
(inner knob) -positions the selected channel vertically. If the
selected channel is "OFF," the effects of any control changes
take effect when the trace is turned back on. The position of
stored waveforms are not affected by this control. When held in
and turned, it is the Variable VOLTSIDIV control for the selected
channel.
In XY display mode, select CH 1 to position the display hori-
zontally; select CH 2 to position the display vertically.
VOLTSJDIV Switch (outer knob) -controls the VOLTSIDIV
scaling of the channel selected by the
(CH
or
a
button. The
VOLTS/DIV settings for both channels are displayed in the top
line of readout, and the selected channel's VOLTSIDIV readout
is boxed. If the channel trace is turned off, the word "OFF"
appears in place of the VOLTSjDlV readout for that channel.
VOLTSIDIV changes made to an "OFF" channel take effect
when the trace is turned back on.
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