Tektronix DD 501 Instruction Manual page 9

Operating
Instructions
—
DD
501
POWER.
Pilot
Light indicates
power
applied.
TRIG'D.
Indicates
EVENTS
circuit
has
received a trigger.
SLOPE,
Selects
EVENTS
trigger
polarity.
LEVEL.
Selects the
amplitude point
where
the
EVENTS
circuit triggers.
PRESET.
Allows trigger point to
be
preset
(LEVEL clockwise
in detent).
LEVEL IN/OUT.
Provides
an output
to
monitor the dc
level at
which the
EVENTS
trigger occurs.
INPUT.
Provides
ameans
of
connecting
the external trigger
signal to the
EVENTS
trigger preamplifier.
TRIG'D.
Indicates a
delayed trigger
output has occured.
DLY'D TRIG OUT.
Provides
an output
of
the delayed
trigger pulses.
[
[
[
[
[
[
[
[
EVENTS DELAY COUNT.
Selects
number
of
events
to
be counted.
RESET.
Restarts
count
cycle.
TRIG'D.
Indicates
START
gate
triggering.
SLOPE.
Selects
START
trigger polarity.
LEVEL. Selects the amplitude point
where
the
START
circuit triggers.
PRESET.
Allows
trigger point to
be
preset
(LEVEL clockwise
in
detent).
LEVEL IN/OUT. Provides
an
output
to
monitor the dc
level at
which
the
START
trigger
occurs.
INPUT.
Provides a
means
of
connecting
the external trigger signal to
the
START
trigger preamplifier.
TRIG VIEW.
Allows viewing
of
shaped
trigger
pulses to
START
latch circuit.
TRIG VIEW. Allows viewing
of
shaped
trigger
pulses to
EVENTS
counting
circuit.
1S18-7A
Fig. 1-5.
DD
501 front
panel controls
and connectors.
@
AUG
1979
1-5