Voltage Limit Setpoint - ILX Lightwave LDX-36000 Series User Manual

Voltage Limit Setpoint

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10 Calculate the slope and offset of the voltage limit calibration with the following equations:
11 Send the voltage limit calibration to the 36000 using the following command:
12 Set the adjustable voltage source to 0V.
13 Set the 36000 voltage limit to 50% of full scale.
14 Slowly increase the voltage on the adjustable voltage source until the voltage limit light is
15 Verify that the voltage limit is triggered within the accuracy specifications of the
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C A L I B R A T I O N A N D T R O U B L E S H O O T I N G
Set the 36000 Display to Voltage by sending the following command: LAS:DIS:V
Set the voltage calibration to default values by sending the following command:
LAS:CAL:LDV 1,0
Connect an adjustable voltage source to the laser diode voltage sense lines located in the
DB9 on the back panel of the 36000.
Connect a DMM to measure the output of the voltage source.
Set the adjustable voltage source to 0V.
Set the 36000 voltage limit to 20% of the max voltage limit with the following command:
LAS:LIM:V limit
- where "limit" is the voltage limit value in volts
Slowly increment the voltage on the adjustable voltage source until the voltage limit light is
triggered. Record the voltage at which the voltage limit is triggered.
Set the 36000 voltage limit to 80% of the max voltage limit with the following command:
LAS:LIM:V limit
- where "limit" is the voltage limit value in volts
Slowly increment the voltage on the adjustable voltage source until the voltage limit light is
triggered. Record the voltage at which the voltage limit is triggered.
slope =(80% Voltage Limit Value - 20% Voltage Limit Value) / (36000 80% Trigger Value-
36000 20% Trigger Value )
offset = 80% Voltage Limit Value - ( slope * 36000 80% Trigger Value )
LAS:CAL:LIMITV slope,offset
triggered.
instrument.
Voltage Limit Setpoint
LDX-36000 Series
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C H A P T E R
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