Photodiode Measurement Program - Keithley 2500 User Manual

H-4 Example Programs

Photodiode measurement program

The program listing below performs photodiode measurements as covered in Section 4.
This program sets up the following operating modes:
• Channel 1 measurement: current measurement, auto range
• Channel 2 measurement: optical power, R = 1, D = 0.
• Channel 2 MX + B units: M = 8.33333, B = 0.
• Channel 1 source: 10V range, +10V amplitude
• Channel 2 source: 100V, +20V amplitude
' Photodiode Measurement Program
OPEN "IEEE" FOR OUTPUT AS #1
OPEN "IEEE" FOR INPUT AS #2
PRINT #1, "INTERM CRLF"
PRINT #1, "OUTTERM LF"
PRINT #1, "REMOTE 25"
CLS
PRINT #1, "OUTPUT 25;*RST"
PRINT #1, "OUTPUT 25;:FORM:ELEM CURR1" ' Select channel 1 for READ?.
PRINT #1, "OUTPUT 25;:CALC2:FORM OP2" ' Select optical power.
PRINT #1, "OUTPUT 25;:CALC2:KMAT:RESP 1"' R = 1.
PRINT #1, "OUTPUT 25;:CALC2:KMAT:DC 0" ' D = 0.
PRINT #1, "OUTPUT 25;:SOUR1:VOLT:RANG 10"' Select 10V Ch. 1 source range.
PRINT #1, "OUTPUT 25;:SOUR1:VOLT 10"
PRINT #1, "OUTPUT 25;:SOUR2:VOLT:RANG 100"' Select 100V Ch. 2 source range.
PRINT #1, "OUTPUT 25;:SOUR2:VOLT 20"
PRINT #1, "OUTPUT 25;:OUTP1 ON"
PRINT #1, "OUTPUT 25;:OUTP2 ON"
PRINT #1, "OUTPUT 25;:SENS1:CURR:RANG:AUTO ON"' Ch. 1 auto measure range.
PRINT #1, "OUTPUT 25;:SENS2:CURR:RANG:AUTO ON"' Ch. 2 auto measure range.
PRINT #1, "OUTPUT 25;:READ?"
PRINT #1, "ENTER 25"
LINE INPUT #2, R$
PRINT "Channel 1 reading: "; R$
PRINT #1, "OUTPUT 25;:CALC2:STAT ON"
PRINT #1, "OUTPUT 25;:INIT"
PRINT #1, "OUTPUT 25;:CALC2:DATA?"
PRINT #1, "ENTER 25"
LINE INPUT #2, R$
PRINT "Channel 2 reading: "; R$
PRINT #1, "OUTPUT 25;:OUTP1 OFF"
PRINT #1, "OUTPUT 25;:OUTP2 OFF"
END
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Models 2500 and 2502 User's Manual
' Open IEEE-488 output path.
' Open IEEE-488 input path.
' Set input terminator.
' Set output terminator.
' Restore GPIB defaults.
' Output 10V on channel 1.
' Output 20V on channel 2.
' Turn on channel 1 output.
' Turn on channel 2 output.
' Trigger and request Ch. 1 reading.
' Address 2500 to talk.
' Input Ch. 1 reading string.
' Print Ch 1 reading string.
' Enable Ch. 2 math.
' Trigger Ch. 2 math reading.
' Trigger request Ch. 2 math reading.
' Address 2500 to talk.
' Input Ch. 2 reading string.
' Print Ch 2 reading string.
' Turn off channel 1 output.
' Turn off channel 2 output.