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Section 14: SCPI command reference Model 6517B Electrometer Reference Manual

14-40 6517B-901-01 Rev. C / August 2015

: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>

 0 to 15: Specify digital pattern for output port

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 Decimal Weight

Line #1 1

Line #2 2

Line #3 4

Line #4 8

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> (on page 14-44)

Keithley 6517B Reference Manual

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