Datapulse 101 - Page 10

main
pulse
output
will
be
continuous
(in
the
NON—GATED
position)
or
will
occur
in
gated
bursts
as
controlled
by
an
externally
applied
gating
signal.
In
the
two
gated
modes,
internal
circuits
are
disabled
and
main
output
pulses
occur
only
when
a
gate
signal
is
applied
to
the
unit.
The
repetition
rate
generator
circuit
is
disabled
when
the
GATE
MODE
switch
is
in
the
SYNC
position.
The
first
main
pulse
of
a
gated
burst
in
this
mode
is
synchronized
to
the
leading
edge
of
the
gating
signal.
Both
trigger
outputs
are
also
gated.
In
the
ASYNC
position
the
main
output
is
held
off
by
disabling
the
time
delay
circuit
and
the
repetition
rate
generator
is
uninterrupted.
Both
the
main
pulse
output
and
the
reference
trigger
begin
with
the
first
cycle
occurring
after
the
application
of
the
gate
for
either
internal
or
external
triggering.
The
advanced
trigger
output
is
not
gated
and
is
available
as
a
clock
pulse
on
internally
triggered
operations.
The
BNC
connector
labeled
ENABLING
GATE
INPUT
is
provided
for
the
gate
signal
input
when
the
unit
is
operated
in
either
of
the
gated
modes.
2. 2.4 Trigger Outputs
Two
BNC
connectors
labeled
TRIGGER
OUTPUT
provide
for
advanced
and
reference
trigger
outputs
of
approximately
50
nanoseconds
duration.
The
ADVANCED
trigger
is
available
on
internally
triggered
operations
only
and
occurs
approximately
10
percent
of
the
pulse
period
before
the
reference
trigger.
The
REFERENCE
trigger
occurs
approximately
30
nanoseconds
after
the
unit
is
triggered
from
an
external
source.
2.2. 5 Pulse Mode Switch
Single
or
double
pulse
operation
is
selected
by
the
two
position
PULSE
MODE
switch.
In
the
SGL
position
one
pulse
per
cycle
occurs
at
the
outputs
following
the
reference
trigger
by
a
period
determined
by
the
pulse
delay
controls.
Two
identical
pulses
occur
when
the
slide
switch
is
in
the
DBL
position
with
the
second
pulse
at
a.
position
determined
by
the
pulse
delay
controls
and
the
first
pulse
approximately
30
nanoseconds
after
the
reference
trigger.
2.2. 6 Pulse Delay Control
The larger six position PULSE DELAY knob selects the range in decade
steps
and
the
smaller
vernier
knob
provides
continuously
variable
control
for
each
position
for
delay
times
ranging
from
30
nanoseconds
to
10
milliseconds.
The
instrument
will
be
set
to
the
delay
indicated
by
the
selector
knob
position
when the vernier knob is fully clockwise.
2.2. 7 Pulse Width Control
The larger six position PULSE WIDTH knob selects the range in decade
steps
and
the
smaller
vernier
knob
provides
continuously
variable
control
for
each position for pulse widths ranging from 30 nanoseconds to 10 milliseconds.
The instrument will be set to the pulse width indicated by the selector knob
position when the vernier knob is fully clockwise.
2—3