Specifications

TRIGGER
(BOTH
A AND
B
lF APPLICABLE)
Refer to
Figure
4
for location of
items
27 through
35.
TRIG
MODE Switches-Three
push
button switches
determine
the
mode of trigger
operation
for
the
A
Sweep.
AUTO-Sweep
is
initiated
by the applied
trigger
signal.
ln the absence
of an
adequate
trigger signal,
or
if
the
trigger
repetition
rate
is less than
about
2A
hertz, the sweep
free runs
and
provides
a bright
reference
trace.
NORM-Sweep
is
initiated by the
applied
trigger
signal.
ln the
absence
of an adequate
trigger
signal,
there
is
no
trace.
When the
trigger
rate is too
low
for
AUTO,
use NORM.
SINGLE SWP-When
this
push
button
is
pressed,
the
A Sweep
operates in the single-sweep
mode.
After
a
single
sweep
is displayed,
further
sweeps
cannot
be
presented
until the
SINGL
SWP
push
button
is
again
pressed.
SINGL
SWP
is useful
in
displaying
and
photographing
either
nonrepetitive
signals
or
signals
that
cause
unstable
conventional
displays
(e.9.,
signals
that
vary in
amplitude,
shape,
or time).
Figure
4.
Trigger
controls,
connectorc,
and
indicators.
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10
4658/DM44
Operators
REV
A AUG
1979