Keysight E4980A User Manual page 458

Handler Interface
Signal Line Definitions
Table E-3 Pin layouts for the comparator
Pin Signal name
number
12 /EXT_TRIG
13 /EXT_TRIG
14 EXT.DCV2
15 EXT.DCV2
16 +5V
17 +5V
18 +5V
19 /PHI
20 /PLO
21 /SREJ
22 /READY_FOR_TRIGGER
23 RESERVED
24 /OVLD
25 /KEY_LOCK
26 RESERVED
27 EXT.DCV1
28 EXT.DCV1
29 /ALARM
30 /INDEX
31 /EOM
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Signal Description
d irection
Input An external trigger signal.
These signals are used in the external trigger mode. Triggering occurs when the pulse
reaches a rising edge.
Input External DC voltage.
Supplies voltage for DC isolation input signals (/EXT_TRIG, /KEY_LOCK) and DC
isolation output signals (/ALARM, /INDEX, /EOM). 
To use the internal DC voltage, switch the settings with the jumper on the handler
interface board.
Output Internal DC voltage.
"Primary parameter beyond upper limit" signal. 
Output
This signal is output when the primary parameter has exceeded the upper limit for
bins 1 to 9.
Output "Primary parameter below lower limit" signal. 
This signal is output when the primary parameter is below the lower limit for bins 1 to
9.
Output "Secondary parameter out of limits" signal. 
This signal is output when the secondary parameter is out the limits.
Output "Ready for trigger" signal. This signal is output while the instrument is ready to accept
trigger signals.
This means that it is output while the measurement screen is in the "trigger wait"
state. It is not output under any other conditions. Also, the signal is never output when
the trigger source is set to Internal Trigger.
-- Not used.
Output "Measurement failed" signal. This signal is output when the analog measurement
mechanism has failed to perform measurement (due to an overload). It is equivalent to
the /UNBAL signal of the 4284A.
Input "Key lock" signal.
When this signal is input, the E4980A/AL's front panel keys are all disabled.
-- Not used.
Input External DC voltage.
Supplies voltage for DC isolation signals (/BIN1 to /BIN9, /OUT_OF_BINS, /AUX_BIN,
/PHI, /PLO, /SREJ, /OVLD). 
To use the internal DC voltage, switch the settings with the jumper on the handler
interface board.
Output "Error detected" signal. 
This signal is output when an instantaneous power failure has been detected. It is also
output when the handler interface board has been reset.
"End of analog measurement" signal. 
Output
This signal is output when analog measurement is complete. This means that once the
handler has received this signal, the next DUT can be connected to the UNKNOWN
terminal. However, measurement data are not available until the /EOM signal is
output.
"End of measurement cycle" signal. 
Output
When this signal is output, the measurement data and sorting results are available.
Keysight E4980A/AL User's Guide