OPTILAB BCB-4 User Manual Download Page 1

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BCB-4

User’s Manual

Automatic Bias Controller Board, Five Mode Operation

Caution

The user must read this manual before operating the BCB-4 unit.

Operations other than those described in this manual may result in personal
injury and/or damage to the unit.

Note that any attempt to open or fix the equipment without prior approval by
Optilab, LLC voids the warranty.

Ver. 1.5

August 18, 2022

Summary of Contents for BCB-4

Page 1: ...st read this manual before operating the BCB 4 unit Operations other than those described in this manual may result in personal injury and or damage to the unit Note that any attempt to open or fix th...

Page 2: ...15 2020 Added Vpi measurement function 1 3 03 15 2021 Specification Modified 1 4 04 26 2022 Added information for setting Vpi or using a feedback loop 1 5 08 18 2022 Modified command set Copyright 20...

Page 3: ...1 2 OPERATION 2 2 1 INTRODUCTION 2 2 2 INITIAL INSPECTION 2 2 3 CONTROLS 3 2 4 APPLICATION BLOCK DIAGRAM 4 2 5 OPERATION INSTRUCTIONS 5 2 6 RS485 COMMAND SET 7 2 7 BIAS CONTROL POINT SETTING INFORMATI...

Page 4: ...RS 485 multi addressing control and monitor interface the BCB 4 unit is the ideal choice for industrial and OEM applications when paired with any of Optilab s wide variety of optical modulators conta...

Page 5: ...pt You should however inspect the unit for any damage that may have occurred in transit If the shipping container or the packing material is damaged keep it until the contents of the shipment have bee...

Page 6: ...al of the modulator DITHER SIGNAL ADJUST This potentiometer adjustments the 1 kHz dither signal from approximately 0 to 450 mV p p BIAS OUTPUT PORT This two pin port is used to relay the corresponding...

Page 7: ...ollowing block diagram denotes the typical connection of the BCB 4 to increase the understanding to the end user on its operation and interconnectivity The BCB 4 bias controller utilizes an on board p...

Page 8: ...ack to the PD of the BCB 4 Without this connection the BCB 4 will not function properly The split ratio of the tap coupler should be selected based on the optical input power to the intensity modulato...

Page 9: ...er marked in the diagram in section 2 3 of this manual rotate this adjustment knob to increase or decrease the dither amplitude value from approximately 20 to 450 mVpp This dither signal can be measur...

Page 10: ...nd CR LF 2 6 RS485 Command Set When the electrical connections have been made and the software settings for serial port transmission are set correctly you are now able to send commands to the BCB 4 mo...

Page 11: ...and 10 dBm for optimum performance C Improper polarization input to modulator S Check the input polarization type and axis alignment of your modulator and confirm the input seed source is matching An...

Page 12: ...Frequency 1 kHz Dither Adjustment Range 20 to 450 mVpp Bias Modes Available Q Q Minimum Maximum and Manual Bias DC Bias Output Voltage Range 10V to 10V Modulator Voltage Vpi Range 1 5 to 8V 5 Mechani...

Page 13: ...or consequential loss Note that the warranty will be void upon any attempt to open or to fix the equipment by the user without prior approval of Optilab LLC 6 2 Service and Calibration Your BCB 4 uni...

Page 14: ...e next to it 4 Wipe the optical connector end face down on the moist wipe 3 times and then repeat on the dry wipe 5 Visually inspect the end face of the optical connector with an optical microscope to...

Page 15: ...BCB 4 User s Manual Page 12 of 14 Optilab LLC 600 E Camelback Road Phoenix AZ 85012 Phone 602 343 1496 Fax 602 343 1489 Email sales oequest com Appendix A 4 pin Molex Connector NOT USED FOR BCB 4...

Page 16: ...C Value The optical input DAC value is a representation of the optical input power to the feedback photodiode If your unit was ordered with the photodiode installed the calibration data for the PD has...

Page 17: ...t address 2 MODE BIAS MODE 1 Q 2 Q 3 MAX 4 MIN 5 Manual Bias SET ADD V XXXXX CR LF Set the bias voltage DAC value when the device is in manual bias mode 5 Range 00000 16383 00000 11 00V and 16383 11 0...