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ILX Lightwave Manuals
Controller
LDC-3700B Series
User manual
ILX Lightwave LDC-3700B Series User Manual
Laser diode controller
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Contents
Table of Contents
Troubleshooting
Bookmarks
Table of Contents
Table of Contents
Figure 1.1 LDC 3700B Series Controller Front View
Figure 1.2 LDC-3700B Rear Panel
Table 1.1 Temperature Controller Specifications
Table 1.2 General LDC-37X4B Specifications
Table 1.3 Options and Accessories
Chapter 2 Operations
Applying Power to Your LD Controller
The Power on Sequence
The Power on State
37X4B Series Default Configuration
Connecting to the Laser Controller
Figure 2.1 Laser Diode Connection Configurations
Connecting the Laser Current Source
Interlock Connections
Photodiode Connections
Figure 2.2 Back Panel LD Connector
Setting the PD Bias
Grounding Considerations
Connecting to the te Controller
TEC Grounding Considerations
Figure 2.3 Rear Panel TEC Connector
Operating from the Front Panel
The Laser Controller Display
Operating a Laser in Constant Current "I" Mode
Set up the Controller
Set the Range
Select the Laser Display
Adjusting the Set Point
Set Current Source Limit
Automatic Shutoff Conditions for Laser Output
Operating a Laser in Constant Power Mode, P
Entering Photodiode Responsivity Values
LASER Error Indicators
Table 2.1 Laser Error Indicators
Operating the te Controller from the Front Panel
The TEC Display
Operating the Controller in Temperature Mode, T
Setting up the Temperature Controller
Temperature Controller Sensor Selection
Setting Temperature Sensor Constants
Table 2.2 SENSOR SELECT Switch Positions
Setting te Control Loop Gain
Setting Temperature Controller Limits
Adjusting the Temperature Set Point
Automatic Shut off Conditions for TEC Output
TEC Error Indicators
Table 2.3 TEC Error Indicators
Functions and Features
Saving and Recalling from the Front Panel
Using the Laser Compliance Voltage Adjustment
Using the LDC-3700B Controller's Trigger Function
Modulating the Controller Laser Current Source
Figure 2.4 LDC-3700B Series Rear Panel
Boosting the te Controller
Figure 2.5 Rear Panel TEC Connector
Remote Operation
Basic GPIB Concepts
Data and Interface Messages
Talkers, Listeners, and Controllers
GPIB Cable Connections
The GPIB Connector
Figure 3.1 GPIB Cable Connections
Reading the GPIB Address
Changing the GPIB Address
Changing Operation from Local to Remote
Figure 3.2 GPIB Connector Diagram
Command Syntax
Letters
White Space
Terminators
Command Separators
Parameters
Table 3.1 Substitute Parameter Names
Command Tree Stucture
Figure 3.3 Command Path Structure
Syntax Summary
Table 3.2 Invalid Syntax Command Strings
IEEE488.2 Common Commands
Figure 3.4 Common Command Diagrams
LDC-3700B Commonly Used Commands
Table 3.3 LDC-3700B Commonly Used Commands
Status Reporting
Event and Condition Registers
Operation Complete Definition
Figure 3.5 Status Reporting Scheme
Output off Registers
Figure 3.6 LASER Output off Register
Table 3.4 Default Settings for Output off Registers
Figure 3.7 TEC Output off Register
Command Timing
Sequential/Overlapped Commands
Query Response Timing
Command Reference
GPIB Command Reference Summary
Table 4.1 GPIB Command Summary Reference List
Command Reference
Calibration and Troubleshooting
Calibration Overview
Recommended Equipment
Figure 5.1 IPD Calibration Circuit
Table 5.1 Recommended Test Equipment
Local Calibration of the LDC-3700B Temperature Controller
Calibrating the Thermistor
Table 5.2 Required Calibration Components
AD590 Sensor Calibration
LM335 Sensor Calibration
ITE Current Calibration
Local Calibration of the Laser Current Source
Current Source Calibration
Ipd
PD Current Calibration
Laser Forward Voltage Measurement Calibration
Remote Calibration of the LDC-3700B Controller
Thermistor Calibration
AD590 Sensor Calibration
LM335 Sensor Calibration
ITE Current Calibration
TEC Voltage Calibration
Current Source Calibration
Ipd
PD Current Calibration
Laser Forward Voltage Measurement Calibration
Troubleshooting
Table 5.3 Symptoms and Actions
Error Messages
Table 5.4 Error Code Classifications
Table 5.5 Error Messages
Index
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Table 1.2 General Ldc-37X4B Specifications
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