Tektronix DD 501 Instruction Manual page 10

Operating Instructions—
DD
501
TRIG VIEW
Connectors
Individual front-panel probe-tip connectors
are
provided
for
monitoring the
EVENTS
and
the
START
trigger pulse waveforms.
The TRIG VIEW
output
signals
are a representation
of
the input
trigger signals repetition
rates.
The TRIG VIEWoutput
pulse width
is
determined by
the
input
waveshape and
the triggering voltage
level.
For
example, the sinewave
EVENTS
INPUT
signal, triggered
at
the amplitude
point
shown
in Fig. 1-6,
produces an
output
trigger width
of 5
microseconds. Consequently,
varying the
trigger amplitude point
on
the
input
waveform
will
vary the output pulse width
proportionally.
DYL'D TRIG
OUT
Connector
Provides a
means
of
applying the shaped
delayed
trigger pulsesto associated equipment. Output
signals are
generated
as positive-going rectangular pulses coinci-
dent with the
end
of
the delay
interval.
The DLY'D TRIG
OUT
pulse width
will
be
identical to
the Schmitt-trigger
pulse width,
which can be monitored
at
the front-panel
TRIG VIEW
connector.
The
display
shown
in Fig.
1-7
illustrates
the relationship
between
the
EVENTS
INPUT
signal,
TRIG VIEW
pulse,
and
the
DLY'D TRIG
OUT
pulse, with the
EVENTS DELAY
COUNT
switch
set
at
00002.
DELAYED
TRIG'D
Light
Provides
a visible indication
when
a
delayed
trigger
output has occurred.
Fig.
1-6 Delayed
output pulse width
vs.
events
input-signal
Fig. 1-7.
Time and
pulse-width
relationships between
input
and
trigger voltage
level.
output
signals.
1-6 @ AUG
1979