Controls, Connectors, and Indicators—2445 Operators
appear on the A Sweep if the B TRIGGER MODE
is set to RUN AFT DLY. When the B TRIGGER
MODE is set to TRIG AFT DLY, intensified zones
appear on the A Sweep only if proper B Sweep
triggering occurs before the end of the A Sweep.
When set to RUN AFT DLY, the position of the
Reference zone is controlled by the A REF OR
DLY POS control as before, and the position of
the Delta zone is controlled by the A control. In
TRIG AFT DLY mode, if the B Sweep is triggered,
the positions of both intensified zones are deter
mined by the first triggering events that occur
after delay times set by the A REF OR DLY POS
and the A controls have elapsed.
When more than one trace is displayed using ALT
VERT MODE, and if the A Sweep is being trig
gered from a single source, with the A t or 1/At
function selected, the Reference zone will appear
on the first selected trace from the following
sequence: C H I, CH 2, ADD, CH 3, then CH 4.
The Delta zone appears on the second selected
trace, and both zones appear on any additional
traces. With CHOP VERT MODE or multiple-
channel triggering, both zones appear on all traces.
Pulling the B SEC/DIV knob to the out position
will cancel the Delta Volts (AV) function, if it is
activated. Pushing in the B SEC/DIV knob to
the locked position will cancel the NO AV WITH
DELAY message on the crt readout, if it is being
displayed.
PULL-ADJ CH 2 DLY-When the A SEC/DIV
switch is set to 10 ns per division, pulling the
B SEC/DIV knob to the out position activates
the Channel 2 delay-offset (CH 2 DLY) adjust
ment feature. See "Matching Channel 2 Delay" in
Section 5, "Operator's Checks and Adjustments,"
to use this feature.
TURN-ALT—Pulling the B SEC/DIV knob to the
out position, then turning it to a faster sweep-
speed setting than the A SEC/DIV sweep-speed
setting, produces the Alternate (ALT) Horizontal
Display Mode. The A Sweep with an intensified
zone will be alternately displayed with the B
Sweep, provided the B TRIGGER MODE is set
either to RUN AFT DLY or to TRIG AFT DLY
with a proper B triggering signal occurring before
the end of the A Sweep. The position of the
intensified zone on the A Sweep indicates the
approximate delay of the B Sweep, and the length
of the intensified zone indicates the approximate
B Sweep duration set by the B SEC/DIV switch.
If either At or 1/At is also activated, intensified
zones and associated B Sweeps will be established
in the same manner as described in "PULL-
INTEN."
PUSH-B—Pushing in the B SEC/DIV knob when
the B SEC/DIV switch is set to a faster sweep
speed than the A SEC/DIV switch presents only
the B Sweep trace(s) on the crt display.
(25) SEC/DIV VAR Control—Continuously varies the
sweep speed between settings of either the A or the
B SEC/DIV switch. This control affects the A Sweep
speed when the A and B SEC/DIV switches are
locked together. When any of the delayed-sweep
horizontal modes are displayed, the control affects
only the B Sweep speed.
Fully counterclockwise rotation extends the sweep
speed of the slowest A SEC/DIV switch setting
(1 s per division) to 1.5 s per division. Fully clock
wise rotation (detent position) produces the sweep
speed indicated by the position of the SEC/DIV
switches. The crt readout displays the actual time-
per-division scale factor for all settings of the VAR
control.
This control produces fine resolution over a portion
of its range, after which it changes to coarse reso
lution. It reenters the fine-resolution range upon
reversing the direction of rotation.
(2?) TRACE SEP Control—Provides for vertical position
ing of the B trace downward from the A trace when
TURN-ALT Horizontal Display Mode is selected.
Counterclockwise rotation moves the B trace down
ward. At the fully clockwise stop position of the
control, there is no separation between the A and B
traces. When the PUSH-B Horizontal Display Mode
is selected and when either At or 1/At measurement
mode is active, the TRACE SEP control provides for
vertical positioning of the trace or traces associated
with the A control.
(27) Horizontal POSITION Control-Sets the horizontal
position of the sweep displays on the crt. Clockwise
rotation of the control positions the display to the
right. This control produces fine resolution over a
portion of its range, after which it changes to coarse
resolution. It reenters the fine-resolution range upon
reversing the direction of rotation. The Horizontal
POSITION control does not affect the X-Y display
position on the crt.
3-5
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