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903-0623-00 Rev. A
Model 903 User's Guide, FMB-X-2.5 Version
1.0 Introduction
Focal's Model 903 is a video/data multiplexer and fiber optic transmission system designed for Remotely
Operated Vehicle (ROV) applications. The Model 903 uses Time Division Multiplexing (TDM) and
Wavelength Division Multiplexing (WDM) to provide high multiplexing density in a compact, low-power
package. Typical systems support 8 broadcast quality composite video channels, up to 64 digital
channels, and 2 additional bidirectional optical channels for high-speed sonar, digital video, or 1 Gbps
Ethernet links.
This user's guide provides complete information on the design, configuration, installation and operation of
the Model 903 multiplexer system based on FMB-X-2.5 cards. This manual and the appropriate
reference documents should be reviewed prior to installation or reconfiguration of the multiplexer.
Some sections of the manual apply to optional cards or features that are not included with the delivered
system but may be added later.
Appendices include the following information:
Appendix A - A list of connectors and pin configurations
Appendix B - A list of all fuses used in the system
Appendix C - Guidelines for upgrading from FMB to FMB-X-2.5 base systems
Appendix D - Obsolete systems included in this manual for reference
Focal Technologies Corp.
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