Interlock
Connector
3-Lug
Female
Triax
3-Lug
Female
Triax
·
3-Lug
Female
Triax
Banana
Jack
>---+-
Output
LO
Figure
2-8.
Test
Fixture
Using
Guard
and
Remote
Sensing
designed for safety grounding.
The
other
end
of
the
ground
wire
must
then
be
at-
tached to a
known
safety earth ground.
Inner
Panel
OUT test sockets should
be
mounted
on
a metal inner
panel.
By
insulating the inner panel from the test fixture
chassis, the panel can
be
connected to
guard
as
shown
in
Figure 2-8,
or
connected to
output
low
or
chassis. Con-
necting the inner panel to
guard
reduces effective capaci-
tance between the test fixture chassis
and
the OUT.
This
reduced capacitance
may
provide increased
source/
+
SECTION2
Operation
Open
Lid
=
Open
Switch
+
Screw
Terminal for
Earth
Safety
Ground
Inner
Panel
Connected
to
Guard
WARNING:
Test
Fixture
must
be
connected
to
a safety
earth
ground
measure speed. Connecting the inner panel to
output
low
or
test fixture chassis improves shielding from external
noise (see
paragraph
2.3.2).
Interlock
When a normally-open,
SPST
momentary switch is
prop-
erly implemented as a safety interlock, the
Source
Meas-
ure
Unit
will
go into standby whenever the test fixture lid
is
open
or
ajar.
See
paragraph
2.3.1
for information
on
the
Source Measure
Unit interlock feature.
2-13
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