User Manual
18-100 SCPI Command Reference 2400 Series SourceMeter
®
User’s Manual
AUTO <b>
:SOURce2:CLEar:AUTO <b> Control auto-clear for digital output
Parameters <b> = 0 or OFF Disable auto-clear
1 or ON Enable auto-clear
Query :AUTO? Query auto-clear
Description This command is used to enable or disable auto-clear for the digital
output lines. When enabled, the output pattern will clear automati
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cally after the “pass or fail” output bit pattern of a limit test is sent to a
handler via the digital output lines.
The :DELay command specifies the pulse width of the limit test bit
pattern. (See next command.) After the delay period times out, the
digital output clears back to the output pattern programmed by the
:TTL:LEVel command.
When auto-clear is disabled, the digital output pattern can only be
cleared by the :IMMediate command.
On power-up, auto clear is enabled.
See “CALCulate2” subsystem and Section 12, “Limit Testing,” for
details on limit tests.
DELay <n>
:SOURce2:CLEar:AUTO:DELay <n> Set delay for auto-clear
Parameters <n> = 0 to 60 Specify delay (in seconds)
DEFault 100µsec delay
MINimum 0 sec
MAXimum 60 sec
Query :DELay? Query delay
:DELay? DEFault Query *RST default delay
:DELay? MINimum Query lowest allowable delay
:DELay? MAXimum Query maximum allowable delay
Description This command is used to set the delay for digital output auto-clear.
This delay determines the pulse width of the limit test output pattern
as required by the handler. After the delay, the output returns (clears)
to the pattern programmed by the :TTL:LEVel command.
The delay actually defines the pulse width for line 4, which is used by
category register component handlers as the end-of-test (EOT)
strobe. The pulse width of the other three lines are 20µsec longer
(10µsec before line 4 is toggled, and 10µsec after line 4 is cleared).
Skewing the timing on line 4 provides setup and hold time for cate
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gory register component handlers. See Section 12, “Limit Testing,”
for details on timing.