Table 4-3 Basic Laser Diode Test Command Sequence - Keithley 2520 User Manual

4-8 Laser Diode Testing
NOTE
Table 4-3
Basic laser diode test command sequence
1
Step Action
1 Configure laser diode measure.
2 Configure detector measure.
3 Configure laser source.
4 Configure detector bias sources.
5 Configure math functions.
6 Turn on outputs.
7 Trigger and read data.
8 Turn off outputs.
1
Steps correspond to front panel steps previously in
2
Commands must be sent in order given.
3
Instrument must be addressed to talk after :READ?, :CALC1:DATA?, and :CALC2:DATA? to acquire data.
See Appendix H for a functional program example.
*RST
:SENS1:VOLT:RANG 10
:SENS1:VOLT:POL POS
:SENS2:CURR:POL NEG
:SENS3:CURR:POL NEG
:FORM:ELEM CURR3
:SENS2:CURR:RANG 0.01
:SENS3:CURR:RANG 0.05
:SOUR1:CURR:RANG 0.5
:SOUR1:CURR 0.5
:SOUR1:VOLT:PROT 5
:SOUR1:CURR:POL POS
:SOUR1:FUNC PULS
:SOUR1:PULS:DEL 200e-6
:SOUR1:PULS:WIDT 10e-6
:SOUR1:CURR:LOW 10e-3
:SOUR2:VOLT 20
:SOUR3:VOLT 10
:CALC1:FORM POWER1
:CALC2:KMAT:MBF 2
:CALC2:KMAT:MMF 0.5
:CALC1:STAT ON
:CALC2:STAT ON
:OUTP1 ON
:READ?
:CALC1:DATA?
:CALC2:DATA?
:OUTP1 OFF
"Front panel laser diode testing," page
2,3
Commands
4-3.
Model 2520 User's Manual
Comments
Restore GPIB defaults.
LD measure range = 10V.
LD positive polarity.
Det. #1 negative polarity.
Det. #2 negative polarity.
Det. #2 current data.
Det. #1 10mA range.
Det. #2 50mA range.
0.5A LD source range.
LD source output = 0.5A.
5V LD source voltage limit.
LD source positive polarity.
LD source pulse mode.
200µsec pulse delay.
10µsec pulse width.
10mA low current pulse.
Det. #1 source output = 20V.
Det. #2 source output = 10V.
Select LD power math.
Det. #1 B = 2.
Det. #1 M =0.5.
Enable LD math function.
Enable Det. #1 math.
All source outputs on.
Trigger, get readings.
Acquire LD math data.
Acquire Det. #1 math data.
Outputs off after measuring.