17-76 SCPI Command Reference Models 2500 and 2502 User’s Manual
BSTate <b>
:SOURce3: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>
:SOURce3: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,
digital I/O line 4 becomes EOT, /EOT, BUSY, or /BUSY based on the
SOUR3:TTL4:MODE and SOUR3:TTL4:BST commands above. In 4-
bit mode, digital I/O line 4 is controlled manually if
SOUR3:TTL4:MODE is set to EOT. If SOUR3:TTL4:MODE is set to
BUSY, operation is identical to the 3-bit mode. The 16-bit size is avail-
able 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]
:SOURce3: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.
AUTO <b>
:SOURce3: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
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