Model 6485 Picoammeter Instruction Manual Relative, mX+b, m/X+b (reciprocal), and log 5-7
SCPI programming — mX+b, m/X+b, and log
A) :DATA? and :DATA:LATest?
The INITiate command must be sent to trigger the measurements and calculations. The
number of calculations depend on how many measurements the instrument is programmed
to perform.
If the instrument is programmed to perform a finite number of measurements, the :DATA?
command will return all the CALC1 readings after the last reading is taken. The
:DATA:LATest? command will only return the last (latest) CALC1 reading.
If the instrument is programmed to perform an infinite number of measurements (arm
count or trigger count set to infinite), you cannot use the :DATA? command to return
CALC1 readings. However, you can use the :DATA:LATest? command to return the last
CALC1 reading after aborting the measurement process. After sending the INITiate com-
mand to start the measurement process, use the ABORt command to abort the measure-
ment process, then use :DATA:LATest? to return the last CALC1 reading.
Table 5-3
SCPI commands — mX+b, m/X+b, and log
Commands Description Default Ref DDC
CALCulate[1]
:FORMat <name>
:KMATh
:MMFactor <n>
:MBFactor <n>
:MUNits <name>
:STATe <b>
:DATA?
:DATA:LATest?
CALCulate1 Subsystem:
Select calculation; MXB, RECiprocal, or LOG10.
Path to configure mX+b and m/X+b:
Specify scale factor (M) for mX+b and m/X+b;
-9.99999e20 to 9.99999e20.
Specify offset (B) for mX+b and m/X+b;
-9.99999e20 to 9.99999e20.
Specify units for mX+b or m/x+b result:
1 character: A–Z, ‘[‘=Ω, ‘\’=˚, ‘]’=%.
Enable or disable the selected calculation.
Returns all CALC1 results triggered by the INITiate.
Returns only the latest CALC1 reading.
MXB
1.0
0.0
X
OFF
A
A
D1 (LOG10)
D0 (Off)
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