Agilent Technologies 4339B, Operation Manual

Page: 113 / 287

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 V oltage 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