User Manual

2400 Series SourceMeter
®
User’s Manual SCPI Command Reference 18-99
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 automatically controlled in 4-bit mode. (See
“BSIZe <n>,”
page 18-99.) Likewise, with BUSY enabled in the 4-bit mode, the unit
behaves if it were in 3-bit mode by ignoring all attempts to drive Digi-
tal 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
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 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. 16-bit size is available
with the 2499-DIGIO option.
Clearing digital output
[:IMMediate]
:SOURce2:CLEar[:IMMediate] Clear digital output lines
Description This action command is used to immediately restore the digital out-
put lines to the output pattern defined by the :TTL:LEVel command.