Agilent Technologies 4349B User Manual

4349B
Theory of
Operation
This
section
provides
the
4349B's
theory of
operation.
Overall
Measurement Theory
The
4349B measures
the
resistance
of
the
Device
Under
T
est
(DUT)
in
the
following
manner
.
Figure
3-6.
Simplied
Model
of
the
4349B
Figure
3-6
shows
the
simplied
model
of
the
4349B
measuring
a
DUT
.
In
Figure
3-6
,
a
DUT
is
connected
in
series
with
test
voltage
source
V
,
and
ammeter
A.
Ri
is
the
4349B
's
input
resistance
(
R
i
=
1
k
).
In
the
current
measurement
mode
(the
measurement
parameter
is
I),
the
4349B
displays
the
actual
current
I
for
the
measurement
result.
F
or
example
,
if R
is 100
k,
and V
is
1
V
,
the
measurement
result
will
be
9.9

A
(
1
100
k
+1
k
).
In the
resistance
measurement
mode
(the
measurement
parameter
is
R),
the
4349B
displays
the
\derived" DUT
resistance,
R
,
which
coincides
with
the
actual
DUT
resistance
.
In
other
words
,
if
the
ammeter
measures
I
when
the
source
voltage
is
V
,
the
4349B displays
the DUT
resistance
R
,
calculated
using
the
following
equation:
R =
V
I
0 Ri
Function Reference 3-19

Agilent Technologies 4349B Specifications

General

Brand	Agilent Technologies
Model	4349B
Category	Measuring Instruments
Language	English