Keithley 2001

IEEE-488 Reference
4-168
Description
These commands are used to set the logic levels for the digital output port. The actual level (high
or low) of a digital output line depends on its programmed polarity (see Output subsystem). If
the polarity of a line is active-high, then that line will be high when it is set to be true (1 or ON),
and low when it is set to be false (0 or OFF). Conversely, if polarity is active-low, the line will
be low when it is set to be true, and high when it is set to be false.
Programming example
10 OUTPUT 716; “:sour:ttl on; ttl?”
20 ENTER 716; A$
30 PRINT A$
40 END
Line 10 Sets output line #1 to true, and then queries the state of the output line.
Line 20 Addresses the Model 2001 to talk.
Line 30 Displays the state of output line #1 (1; on).