Solartron 1260 - Basic In-circuit Impedance Measurement Connections

6
BASIC
CONNECTIONS
FOR
MEASUREMENTS
IN-CIRCUIT
IMPEDANCE
Th
e
basic
connections
for
m-circuit
impedance
measurements
are
shown
in
Fig
6.8.
1 his
is
intended
as
a
guide
when
connections
are
made
other
than
through
a test
module,
e.g. in
automatic
test
systems.
All
circuit
paths
in
parallel
with
the item
under
test,
which
have
an
an
external
node,
may
be
excluded
from
the
measurement
by
virtual
earth
guarding.
Simply
connect
each
node
to
ground
through
the
screens,
as
shown
in Fig
6.8.
Fig
6.8
Connections
to
be
made
for in-circuit
impedance
measurements
when
not
using
the
in-circuit
test
module.
6.1
CABLE
LENGTHS
Avoid
using
excessively
long
cables,
otherwise
the
measurement
accuracy
may
be
r
mA
[
-I
r*
r
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6.10
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