MODEL 8282-1 TRANSIENT PULSE GENERATOR
for conducted transient susceptibility testing, 0.15 S - 5.0 S - 10.0 S up to 600 volts (peak)
APPLICATION
The Model 8282-1 Transient Pulse Generator
was designed for screen room use in making
conducted spike susceptibility tests. It provides
all the waveshapes required by MIL-STD-461B/C
and many other military EMI specifications.
DESCRIPTION
Spike generators required for susceptibility
testing have been our specialty since 1962, when
our first unit, the Model 6254-1, was introduced.
The Model 8282-1 incorporates all the flexibility
and technical excellence of the previous models
and provides features required by specification
MIL-STD-461B/C.
Three different spike durations are provided:
0.15 S, 5.0 S, and 10.0 S. The pulse shape
approximates the curve of Figure 19 in MIL-STD-
462. The amplitude of the spike voltage is fully
adjustable and is displayed on an LED meter.
In the series injection mode on 50, 60 or 400 Hz
lines, a phase adjustment allows the spike to
be positioned anywhere on the sine wave of
the power line. This feature makes possible the
injection of interfering transients at selected
points in time to determine the susceptibility of
systems which depend upon frequency or time.
The repetition rate of the spike can be adjusted
with a panel control to any rate from 0.5 to 50
p.p.s. A single pulse can be injected with the aid
of a panel-mounted pushbutton.
All functions are selected by pushbuttons which
are lighted when activated.
The Model 8282-1 Transient Pulse Generator
provides up to 600 volts peak amplitude for
each of the 0.15, 5.0 and 10.0 S spikes. The
output voltage rises steeply to peak amplitude
as adjusted by the panel control, then falls
exponentially to cross through zero at the
duration of 0.15, 5.0, or 10.0 S as selected by
pushbuttons. The voltage falls below zero and
“rings”for a period determined by the inductance
in the output circuit or the load. The peak ampli-
tude displayed on the LED meter is the value
that would appear across a 5.0 ohm non-
inductive load.
With series injection on 50, 60 or 400 Hz power
lines, the spike can be applied to either the
positive or negative half cycle of the power
frequency sine wave. The spike can be adjusted
to fall on the power sine wave from 0 to 360.
For non-synchronous injection, the repetition
rate can be adjusted from 0.5 to 50 p.p.s.
A pushbutton enables the “single spike” feature
and the spike can be manually triggered by
pushing another button. A connector on the
rear panel makes provision for remote triggering
of the single spike feature.
Two methods of remote triggering are provided.
One method requires the application of 24 volts
d.c. to trigger the pulse at rates determined by
an external switch up to 550 p.p.s. The second
method requires the application of a square wave
which can be used to trigger the spike up to
50 p.p.s.for the 0.15 S spike and up to 1000 p.p.s.
for the 5.0 and 10.0 S spikes. This latter feature
can be used to trigger the spike in sync with some
function within the equipment under test.
FEATURES
Provides outputs up to 600 volts peak
amplitude for the 0.15, 5.0 and 10.0 S spikes
into a five ohm resistive load (low source
impedance).
A wide range of repetition rates allows spike
injection in terms of the pulse rates of items
being tested.
The single pulse feature enables controlled
isolation of transient effects.
19
(2 pages)
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