Tektronix 475A - Horizontal, Calibrator, and Power

Fig. 6. Horizontal, calibrator, and power controis, connectors,
and indicators,
HORIZONTAL, CALIBRATOR, AND
POWER
34a,
A
AND
B
TIME/DIV
AND
DELAY
TIME—A
TIME/DIV
switch
(clear
plastic
skirt)
selects
the
sweep
rate
of
the
A
Sweep
circuit
for
A
sweep
only
operation
and
selects
the
basic
delay
time
(to
be
used
by
the
DELAY-
TIME
POSITION
control)
for
delayed
sweep
operation.
B
TIME/DIV
switch
(pull
out
and
rotate
to
unlock)
selects
the
sweep
rate
for
the
B
Sweep
circuit
for
delayed
sweep
operation
only.
A
VAR
control
must
be
in
the
calibrated
detent
for
calibrated
A
Sweep
rates.
When
both
TIME/DIV
switches
are
fully
counterclockwise
to
the
X-V
position,
the
horizontal
(X-axis)
display
is
the
CH
1
input.
34b. DM44 A AND B TIME/DIV AND DELAY TIME—
The controls operate in the same manner as 37a above.
The A TIME/DIV switch also controls the TIME lamps and
decimal point location when the DM44 is in the TIME
or 1/TIME MODE.
35. FINE/POSITION— Positions the display horizontal-
iv for A sweep and B Sweep.
36. X10 MAG—Increases displayed sweep rate by a
factor of 10. It extends fastest sweep rate to 1
nanosecond/division. The magnified sweep is the center
division of the unmagnified display (0.5 division either side
of the center graticule fine).
12
475A/DM44
Operators
e