IEEE-488 Reference
3-106
3.20 :SOURce subsystem
This subsystem is used to set the logic level (true or false) of each digital output line, and is used
to configure the V-Source. Note that the V-Source is controlled (standby/operate) from the
:OUTput1 subsystem.
The commands for this subsystem are summarized in Table 3-11.
3.20.1 Digital Output Commands
[:LEVel] <b>
:SOURce:TTL[1]:[LEVel] <b> Control digital output line #1
:SOURce:TTL2:[LEVel] <b> Control digital output line #2
:SOURce:TTL3:[LEVel] <b> Control digital output line #3
:SOURce:TTL4:[LEVel] <b> Control digital output line #4
Parameters <b> = 1 or ON Set output line true
0 or OFF Set output line false
Query [:LEVel]? Query logic level of specified line
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 is 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 is low
when it is set to be true, and high when it is set to be false.
NOTE
If a LIMITS control is enabled (LOLIM1 or 2, HILIM1 or 2—High, Low, or
Pass), this command does not check or change the output status. Refer to para-
graph 2.19.5 for information on limits.
3.20.2 V-Source Configuration Commands:
:VOLTage Commands
[:LEVel][:IMMediate][:AMPLitude] <n>
:SOURce:VOLTage[:LEVel][:IMMediate][:AMPLitude] <n> Set V-Source amplitude
Parameters <n> = -100 to +100 Set voltage for 100V range
-1000 to +1000 Set voltage for 1000V range
DEFault 0V
MINimum Greatest allowable negative value
MAXimum Greatest allowable positive value
Query :VOLTage? Query programmed amplitude
:VOLTage? DEFault Query *RST default value
:VOLTage? MINimum Query minimum amplitude
:VOLTage? MAXimum Query maximum amplitude
Description This command is used to set the amplitude for the V-Source. Notice that three commands in the
path are enclosed by brackets ([]) to indicate that they are optional. Thus, this command can be
sent in the following form:
:SOURce:VOLTage <n>
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