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4349B
T
o
Set
the
Contact
Check
The
Cont
Check
annunciator(
9
)
tells
the
current
contact
check
status
.
T
o
set
or
abort
the
contact
check
function:
Note
Before
performing
the
contact
check,
perform
the
OPEN
correction
to
measure
the
reference
value
of
the
contact
check.
Note
The
contact
check
feature
of
the
4349B
discriminates
Contact/NO
Contact
based
on
the
dierence
in
capacitance
between
when
the
DUT
is
connected
and
when
it
is
not
connected
(Open).
Therefore
,
if
the
change
of
capacitance
between
those
two
dierent
states
is
not
enough,
the
discrimination
may
fail.
T
o
enable
or
disable
the
contact
check
function:
1.
Press
.
2.
Select
ON/OFF
using
or
and
press
to
select.
3.
Select
On
or
Off
using
or
,
and
press
to
exit
to
the
previous
display
.
4.
Select
Exit
using
or
,
and
press
to
exit.
5.
The
Cont
Chk
annunciator(
9
)
turns
ON
if
the
contact
check
function
is
enabled.
In
the
case
of
the
contact
check
function
is
enabled,
N.C.
(No-Contact)
will
be
displayed
when
the
contacts
between
dut
and
xture
are
open.
See
\Contact
Check
Eective
Range
"
in
Chapter
8
for
the
contact
check
eective
range
.
T
o
perform
the
contact
check
eectively
,
note
the
following:
Connect
the
coaxial
cable
as
close
to
the
DUT
as
possible
.
If
the
judgment
result
is
Contact
when
the
DUT
is
not
connected
due
to
variation
in
residual
capacitance
of
the
xture
or
cable
used
for
the
automated
test
equipment,
set
an
Oset
value
for
the
Limit
value
to
provide
a
stricter
discrimination
criterion.
F
or
the
principle
of
operation
of
the
contact
check,
refer
to
Chapter
3
\Principle
of
Operation."
Contact
check
compares
a
measured
capacitance
data
of
dut
with
a
limit
data.
Interpretation
of
the
limit
data
and
the
measured
capacitance
data
of
the
dut
are
shown
below
.
2-8
Operating
the
4349B
Содержание 4349B
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Страница 29: ...C Overload No Contact Operations Messages Instrument Errors Messages 2 GPIB Errors Messages 3 Index Contents 9 ...
Страница 42: ...4349B Figure 1 1 Power Cable Supplied 1 10 Getting Started ...
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Страница 173: ...4349B Figure 8 5 Current Measurement Additional Error Measurement Time 400 msec General Information 8 11 ...
Страница 176: ...4349B Figure 8 9 10 Additional Error Measurement Time 400 msec 8 14 General Information ...
Страница 210: ...4349B Figure B 1 Handler Interface Comparison Output Signals Diagram B 2 Handler Interface Installation ...
Страница 212: ...4349B Figure B 3 Handler Interface Input Signal Diagram B 4 Handler Interface Installation ...
Страница 216: ...4349B Figure B 4 A1 Main Board B 8 Handler Interface Installation ...
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