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than
5
volts
on
this input will
cause
the
generator
to
produce an
output
sig-
nal on
all
outputs simultaneously.
Less
than
0. 5
volts
on
this
input will
cause
the
generator
to
stop
producing
a signal
on
the outputs.
On
the
re-
moval
of
the
trigger
input voltage, the
generator
will
stop only after the
completion
of
the cycle
in
which
the
trigger
input
was removed.
The
start
and
stop points
of the
waveforms
are nominally
as follows:
Triangle
Sine
Square
Start
Stop
Zero
Zero
Zero
To
put
it
another way,
a
trigger input
of
any
duration
will
produce an
inte-
ger
number
of
cycles.
The
input
impedance
at this
connector
will
not be
less
than
1
Kn.
.
The
quiescent
state of the
triggered
sine
and
triangle will
be
less
than
1%
of
the
programmed
peak
to
peak amplitude
±1
mv.
The
quiescent
state of the
square
wave
will
be within
1%
of
the
programmed
positive
peak
value ±1
mv.
Amplitude
of the
transient
at the
stop point dis-
continuity
of the
sine
and
triangle will be less than
1%
of the
programmed
peak
to
peak
value ±1
mv.
On
the fixed
amplitude
sine
and
triangle outputs,
it
will
be
less
than
10
mv.
On
the front
panel
of
the
Model
155,
there
is
a single cycle
pushbutton
which
produces
a brief gating signal
when
the
generator
is
in
the
triggered
mode.
The
pushbutton
will
produce
a single
cycle on
all
outputs.
The
start
and
stop
points
are
the
same
as
the
voltage triggered operation.
The
triggered op-
eration
is
not specified
above 200
KHz.
ANALOG VOLTAGE CONTROL
INPUT
(VCG)
This
input
is
a
BNC
connector on
the
rear panel
of the
Model
150
and
dupli-
cate
connectors on
the front
and rear panels
of the
Model
155.
This analog
voltage control
can be used
to
trim
or
otherwise
modify
the existing
program
by
putting
in
a dc
level,
or
it
can be used
to
frequency modulate
the outputs
of
the
generator.
In
any
case,
it
must
be
remembered
that the
analog
volt-
age control
input
adds
to
or subtracts
from
the
existing
closure
program,
de-
pending on
the polarity
of
the input signal.
Positive polarity
adds
to
the
ex-
isting
closure
program
and
negative subtracts.
Operation above
11
times
the
2-6
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