IEEE-488 Reference
3-80
3.17 Output Subsystems
The Output subsystems are used to control the V-Source (standby or operate), and set polarities
for the digital output port. Commands for these subsystems are summarized in Table 3-8.
:OUTPut1 Subsystem
[:STATe] <b>
:OUTPut1:[:STATe] <b> Control V-Source
Parameters <b> = ON or 1 Enable V-Source (operate)
OFF or 0 Disable V-Source (standby)
Query [:STATe]? Query state of V-Source
Description This command is used to enable or disable the V-Source. When enabled, the V-Source is placed
in operate. When disabled, the V-Source is placed in standby. The V-Source is configured from
the :SOURce subsystem (see paragraph 3.19).
Note that the V-Source for Auto-V-Source Ohms is controlled from the :SENSe Subsystem (see
paragraph 3.19.6; Ohms ranges).
:OUTPut2 Subsystem ?
:LSENse <name>
:OUTPut2:TTL[1]:LSENse <name> Set polarity of line #1
:OUTPut2:TTL2:LSENse <name> Set polarity of line #2
:OUTPut2:TTL3:LSENse <name> Set polarity of line #3
:OUTPut2:TTL4:LSENse <name> Set polarity of line #4
Parameters <name> = AHIGh Set polarity of specified line to active high.
ALOW Set polarity of specified line to active low.
Query :LSENse? Query polarity of specified line
These commands are used to set the polarity of the digital output lines. When set for active high
(AHIGh) polarity, the specified output line is true (ON) when the output level is high. The output
line is false (OFF) when the output level is low. When set for active low (ALOW) polarity, the
output line is true (ON) when the output level is low. The output line is false (OFF) when the
output level is high.
The logic levels (true or false) of the digital output lines are set from the SOURce Subsystem
(see paragraph 3.19).
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