Agilent Technologies 4339B - Page 105

4339B
Front
P
anel
Contact
Check
K
ey
The
Contact
Check
key
toggles
the
contact check
function ON
and OFF
. This
function monitors
whether
the
DUT
is
properly
connected
to the
test xture
or test
leads.
When
the
contact
check
fails
,
N.C.
(No-Contact)
will
be
displayed
on
the
LCD
display
.
The
measurement
status
of
the
GPIB
output data
is set
to 2
(No-Contact). Refer
to
\A
ddress
Key
"
for
the
GPIB
output
data.
The
/NO CONT
ACT
pin of
the handler
interface
is
asserted.
Refer
to
\Handler
Interface
"
for
the
pin
assignment
of the
handler interface
.
The
measurement is
still performed,
and
the
measurement
result
is
outputted
to
the
GPIB
interface
and the
handler interface
.
The
decision limit
value of
the
contact
is
obtained
during
the
OPEN
correction.
When
the
OPEN
correction
is
performed,
unconnected
capacitance
is measured
and
stored.
The
4339B
compares
this
vale
with
the
DUT's
capacitance
.
The
Cont
Chk
annunciator(
9
)
is
displayed
when the
contact check
function is
ON.
The
default
setting
is
OFF
.
Function Reference 3-15