Model 6485 Picoammeter Instruction Manual Limit Tests 8-7
SCPI programming
A) FEED <name>
Name parameters:
• CALCulate1 — Limit tests will be performed on the result of a math calculation
(mX+b, m/x+b, or log).
• SENSe — Limit tests will be performed on the input signal. Note however, that Rel can
be used on the result of a math calculation as well as the input signal. Limit tests will be
performed on the result of the Rel operation (see CALCulate2:NULL). Details on rela-
tive, mX+b, m/X+b, and log are provided in Section 5.
Table 8-2
SCPI commands — limit tests
Command Description Default Ref
:CALCulate2
:FEED <name>
:LIMit[1]
:UPPer
[:DATA] <n>
:LOWer
[:DATA] <n>
:STATe <b>
:FAIL?
:LIMit2
:UPPer
[:DATA] <n>
:LOWer
[:DATA] <n>
:STATe <b>
:FAIL?
:NULL
:OFFSet <NRf>
:STATe <b>
:DATA?
:LATest?
CALCulate2 Subsystem:
Select input path for limit testing; CALCulate[1]
or SENSe[1].
Limit 1 Testing:
Configure upper limit:
Set limit; -9.99999e20 to 9.99999e20.
Configure lower limit:
Set limit; -9.99999e20 to 9.99999e20.
Enable or disable Limit 1 test.
Return result of Limit 1 test; 0 (pass) or 1(fail).
Limit 2 Testing:
Configure upper limit:
Set limit; -9.99999e20 to 9.99999e20.
Configure lower limit:
Set limit; -9.99999e20 to 9.99999e20.
Enable or disable Limit 2 test.
Return result of Limit 2 test; 0 (pass) or 1(fail).
Configure and control Rel:
Specify Rel value; -9.999999e20 to 9.999999e20.
Enable or disable Rel.
Return CALC2 reading(s) triggered by INITiate.
Return last (latest) CALC2 reading.
SENS
1.0
-1.0
OFF
1.0
-1.0
OFF
0.0
OFF
A
B
B
Section 5
C
C
ARM
:SOURce <name>
INITiate
Trigger Subystem:
Arm Layer:
Select control source; IMMediate.
Initiate one trigger cycle.
IMM
Section 7
D
C
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