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Section 14: SCPI command reference
:SOURce <NRf>
This command is used to specify the upper and lower LIMIT 1 and LIMIT 2 failure patterns.
Usage
:CALCulate3:LIMit[1]:UPPer:SOURce <NRf>
:CALCulate3:LIMit[1]:LOWer:SOURce <NRf>
:CALCulate3:LIMit2:UPPer:SOURce <NRf>
:CALCulate3:LIMit2:LOWer:SOURce <NRf>
:SOURce?
<NRf>
These commands are used to specify which line(s) of the digital output port goes true when a limit
test failure occurs. The first failure in the test sequence determines the digital output pattern.
Subsequent failures in the test sequence does not change the digital output pattern on the output
port. Each output line is assigned a decimal weight as follows:
Digital Output
Line #1
Line #2
Line #3
Line #4
The parameter value for the digital pattern is determined by adding the decimal weights of the desired
output lines. For example, if you want output lines #2 and #3 to go true when the upper limit of LIMIT
1 is the first failure in the test sequence, use a parameter value of 6 (2+4).
The actual true state (high or low) of each digital output line depends on its programmed polarity.
Polarity is programmed from the OUTPut subsystem.
Note that when the binning strobe is enabled, output line #4 is not considered to be part of the digital
output pattern. The binning strobe uses line #4. With the binning strobe enabled, parameters 8
through 15 are treated the same as parameters 0 through 7.
Also see
BSTRobe:STATe <b>
14-40
0 to 15: Specify digital pattern for output port
Decimal Weight
1
2
4
8
(on page 14-44)
Model 6517B Electrometer Reference Manual
6517B-901-01 Rev. C / August 2015
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