2-1-3
Sweep and Trigger Blocks
(23)
HORIZ
DISPLAY
switches
(24) A TIME/DIV switch
(25) B TIME/DIV switch
(26)
DELAY
TIME POS control
(27) A
VARIABLE
control
(27) PULL X
10
MAG
switch
(on A
VARIABLE
control)
(28)
UNCAL
lamp
(29) Horizontal POSITION control
To select the sweep mode.
A pushbutton sweeps the CRT at the main (A)
timebase rate when pressed.
A INT pushbutton sweeps the CRT at the main
(A)
timebase rate when pressed, and the B timebase
intensifies a section
of
the trace(s). The
location
of
the intensified section
is
determined
by
the
DELAY
TIME POS controL
B pushbutton sweeps the CRT at the rate selected
by
the B TIME/DIV switch, after a delay
determined
by
the A TIME/DIV switch and the
DELAY
TIME POS controL
B TRIG'D pushbutton sweeps the CRT at the rate
selected
by
the B TIME/DIV switch when
triggered
by
the first trigger pulse occuring after
the delay time determined
by
the A TIME/DIV
switch and the
DELAY
TIME POS controL
To select either the calibrated sweep rate of the
main (A) timebase, the delay-time range for
delayed-sweep operation, or
X-Y
operation.
To select the calibrated sweep rate of the
delayed (B) timebase.
To determine the exact starting point within the
A time base delay range at which the B timebase
will
begin sweeping.
Provides continuously variable adjustment
of
sweep rate between steps
of
the A TIME/DIV
switdn
TIME/DIV calibrations are accurate only when
the
A
VARIABLE
control
is
click-stopped fully
clockwise
To expand the horizontal deflection
by
10 times,
thus increasing horizontal sensitivity
by
10 times
for
X-Y
operation, and increasing the effective
sweep speed
by
10
times.
Indicates when A
VARIABLE
controls rotated
out
of
its click-stopped position.
To adjust the horizontal position
of
the traces
displayed on the
CRT.
Clockwise rotation
moves
the traces
to
the right, counterclockwise rota-
tion moves the traces
to
the left.
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