Keithley 2500 User Manual

Models 2500 and 2502 User’s Manual SCPI Command Reference 17-25
Set optical power parameters
DC<n>
:CALCulate[1]:KMATh:DC<n> Set channel 1 dark current value
:CALCulate2:KMATh:DC<n> Set channel 2 dark current value
Parameters <n>=-9.999999e20 to
+9.999999e20 Specify dark current in amps
DEFault 0.0
MINimum -9.999999e20
MAXimum +9.999999e20
Query :DC? Query dark current value
:DC? DEFault Query *RST default dark current
:DC? MINimum Query minimum allowable dark current
:DC? MAXimum Query maximum allowable dark current
Description These commands set the dark current parameter for optical power mea-
surements, as part of the formula:
Optical power = (I
measured
– I
dark current
)/Responsivity
RESP<n>
:CALCulate[1]:KMATh:RESP<n> Set channel 1 responsivity value
:CALCulate2:KMATh:RESP<n> Set channel 2 responsivity value
Parameters <n> = -9.999999e20 Specify responsivity in amps/watt
+9.999999e20 (zero excluded)
DEFault 1.0
MINimum -9.999999e20
MAXimum +9.999999e20
Query :RESP? Query responsivity value
:RESP? DEFault Query *RST default responsivity
:RESP? MINimum Query minimum allowable responsivity
:RESP? MAXimum Query maximum allowable responsivity
Description These commands set the responsivity value as part of the formula:
Optical power = (I
measured
– I
dark current
)/Responsivity
NOTE Zero is not an acceptable value for responsivity, as this value would cause an
infinite result.
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Keithley 2500 Specifications

General

Brand	Keithley
Model	2500
Category	Measuring Instruments
Language	English