Accessories
—
Type
561
A
Type
109
Pulse
Generator
Pulse
Risetime—Less
than
0
.25
nsec.
Pulse Length—
Minimum
of
approximately
0.5
nsec
to
a
maximum
of
40
nsec
at
internal
repetition rate. An
acces
sory
[shipped
with
the
Type
109)
permits
generation
of
long
pulses
at
half
the
internal
rate
that
tilt
down about
10%
in
400
nsec.
Pulse
Repetition
Rate
—
Internally
adjusted to
be
between
550
and
720
cycles.
Output
Impedance—
50
ohms.
Alternate
Pulses
Unequal
charge
lines
can
be
used
to
pro
duce
alternate
pulses
of
different
time
durations.
External
Charge
voltage permits alternate
pulses
of
dif
ferent
amplitudes
and/or
polarity.
Pulse Repetition
Rate
—
10pps
to
100
kc
In
4
ranges
with
continuously
variable control.
Pulse
Amplitude—
More
than
±5
volts.
Pretrigger
Pulse Charateristics
—
10
volts,
250
nsec
duration,
half-amplitude
risetime
about
4
nsec.
Pulse Delay—
Continuously
variable
from
30
to
250
nsec
after
pretrigger
pulse.
Output
Impedance—50
ohms.
Type
110
Pulse
Generator
and
Trigger
Takeoff
Pulse
R'sctime—
Less
than
0.25
nsec.
Pulse
Length—
Minimum
of
0.5
nsec
to
300
nsec
at
half rep
rate.
Pulse
Output
Impedance
—
50
ohms.
Pulse
Repetition
Ra
‘e—Nominally
720
pulses/sec.
Trigger Systems—50-ohm
impedance.
Takeoff system
where
signal is
patched
into a
'loop-through'
arrangement
and
a
portion
of
signal used
as
a
trigger
signal.
Regenerated
trigger
system
with
trigger
output
zhlO-v
amplitude,
225
nsec
duration,
4-n$ec
50%
riselime,
count
down
from
approxi
mately
100
me.
Type
1
11
Prefrigger
Pulse
Generator
Risetime
0.5
nsec for
positive
pulse,
slightly
longer for
negative pulse.
Pulse
Duration
—
2
nsec
minimum,
100
nsec
maximum
at
low
rep
rates
decreasing
to
20
nsec at
100-kc
rep rate
(obtained
with
external
charge
line).
6-10
