17-84 SCPI Command Reference
:MODE <name>
:SOURce2:TTL4:MODE <name> Control Digital I/O port line 4 mode
Parameters <name> = EOTest Use line 4 as EOT signal
BUSY Use line 4 as BUSY signal
Query :MODE? Query Digital I/O line 4 mode
Description This command controls the operation of Digital I/O line 4 to act as either an
End-of-Test or Busy signal in the 3-bit output mode. EOT is not automati-
cally controlled in 4-bit mode. See :BSIZe below. Likewise, with BUSY
enabled in the 4-bit mode, the unit behaves if it were in 3-bit mode by ignor-
ing all attempts to drive Digital I/O line 4.
:BSTate <b>
:SOURce2:TTL4:BSTate <b> Control BUSY and EOT polarity
Parameters <b> = 1 Set EOT/BUSYpolarity high
0 Set EOT/BUSY polarity low
Query :BSTate? Query EOT/BUSY polarity
Description This command sets the polarity of the EOT or BUSY signal in the 3-bit
mode.
:BSIZe <n>
:SOURce2:BSIZe <n> Set Digital I/O bit size
Parameters <n> = 3 Set 3-bit size
4 Set 4-bit size
16 Set 16-bit size (2499-DIGIO option)
Query :BSIZe? Query Digital I/O port bit size
Description This command sets the Digital I/O bit size to 3 or 4. In the 3-bit mode, Dig-
ital I/O line 4 becomes EOT, /EOT, BUSY, or /BUSY based on the
SOUR2:TTL4:MODE and SOUR2:TTL4:BST commands above. In 4-bit
mode, Digital I/O line 4 is controlled manually if SOUR2:TTL4:MODE is
set to EOT. If SOUR2:TTL4:MODE is set to BUSY, operation is identical to
the 3-bit mode. The 16-bit size is available with the 2499-DIGIO option
connected to the Digital I/O port.
NOTE This command is not affected by *RST, :SYSTem:PRESet, or *RCL.
Clearing digital output
[:IMMediate]
:SOURce2:CLEar[:IMMediate] Clear digital output lines
Description This action command is used to immediately restore the digital output lines
to the output pattern defined by the :TTL:LEVel command.
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