Agilent Technologies 4339B - Page 113

4339B
Rear
P
anel
T
able 3-4.
Contact Assignment
for
Comparator
Function
Pin
No
.
Signal
Name
1
Description
1
2
EXT DCV1
EXT
DCV1
External DC
Voltage
1:
DC
voltage supply
pins
for
DC
isolated
open
collector
outputs
(/HI,
/IN/,
/LO/,
/NO
CONT
A
CT).
Maximum voltage
is +24
V,
minimum +5
17 /HV
OFF
V
oltage
Source
OFF:
When
this
line
is
asserted,
output
of
the
voltage
source is
disabled.
18 /KEY
LOCK
Key
Lock:
When
this
line
is
asserted,
all
of
the 4339B
's front
panel key
functions are
disabled.
19 /EXT
TRIG
External
Trigger:
4339B
is
triggered
on
the
rising
edge
of
a
pulse applied
to this
pin when
the trigger
mode
is
set
to
the
External.
2
20
21
EXT
DCV2
EXT
DCV2
External
DC
voltage
2:
DC
voltage
supply
pins
for
DC
Isolated inputs
(/EXT TRIG,
/KEY LOCK,
/HV
OFF)
and
DC
Isolated outputs
(/INDEX, /EOM,
/NOT
READY
,
/ALARM).
Maximum
voltage
is
+15
V
,
minimum
+5
V
24
25
+5
V
+5
V
Internal
voltage
supply
(max.
output 0.1
A):
Exceeding
0.1
A
will
cause
the
internal
voltage
output
and
the
output
signals
to
got
to
zero.
26
27
COM1
COM1
Common for
EXT
DCV1
28 /HI This signal
is asserted,
when
the
comparison
result
is
High.
3
29 /IN This
signal
is
asserted,
when
the
comparison
result
is
In.
3
30 /LO This
signal
is
asserted,
when
the
comparison
result
is
Low
.
3
37 /NO
CONT
A
CT
This
signal
is
asserted,
when
the
contact
check failed.
3
41 /NOT
READY
Not
ready:
This
signal
is
asserted
when the
current
owing
through
the
DUT
exceeds
the
current
limit.
42 /ALARM Alarm:
This
signal
is
asserted
when
a
power
failure
occurs
or the
error (
E11, E12,
E13,
E14,
E15, E20
or
E-313
)
occurs
.
43 /INDEX Index:
This
signal
is
asserted
when
an
analog
measurement
is
complete
and
the
4339B
is
ready
for
the
next
DUT to
be connected
to the
UNKNOWN terminals
.
The
measurement
data,
however
,
is
not
valid
until /EOM
is asserted.
44 /EOM End
of
Measurement:
This signal is asserted when the measurement data and comparison results are valid.
45
46
COM2
COM2
Common for EXT
DCV2
49
50
GND
GND
Ground tied to chassis
.
1 The / (slash) means that the signal is asserted when low
.
2 If an error
occurs and the 4339B stops operation, the 4339B will not trigger a measurement after receiving the /EXT
TRIG signal.
3 If an error occurs and the 4339B stops operation, these lines maintain the condition just before the error occurred.
Function Reference 3-23