Focal 907 User manual

Restrictions on Disclosure
The information and data furnished in this document are deemed confidential and shall not be
duplicated or disclosed to a third party, either in whole or in part, without the express written consent
of Focal Technologies Corp.
Moog Components Group, Halifax Operations
Focal Technologies Corporation
77 Frazee Avenue
Dartmouth, Nova Scotia, Canada B3B 1Z4
Tel: [phone] • Fax: [phone]
Email: [e-mail] • www.moog.com/marine
Model 907
Fiber Optic Video/Data Multiplexer
User's Guide
Part No. 907-0601-00 Rev. C
June 20, 2011
Copyright © 2011, Focal Technologies Corp.

907-0601-00 Rev. C Model 907 Video/Data Multiplexer – User’s Guide
Focal Technologies Corp. Page i
Document Revision History
Document
Revision
Details of Revision
Author
Date
Rev 1
Preliminary release for review.
SST
April 15, 2008
Rev A
Production release.
SST/IBM
May 7, 2008
Rev B
- General update, new format. Added/deleted figures and
fixed typos.
- Added 907-SER, 907-GBE2, 907-HDM2 and 907-CWDM
cards.
- Added new reference documents and acronyms and
abbreviations.
- Updated appendix A (fuses table).
- Added appendix B to show a summary of the Model 907
cards with description and configuration drawing part
number.
ACC/IM
May 28, 2010
Rev C
- Added new 907-GEM motherboard section.
- Update appendix A and B to add fuse and card information
of the 907-GEM.
- Added information to 907-MC, 907-USB, 907-SER and
907-DIAG sections.
- Added note in section 8.2 “Power”.
- Updated description of 907-SPLIT card (now Optical
Splitter Card).
- Updated information in 907-HDM2 section.
- Updated/added information in 907-DIAG-E section.
(Figure 6-11 updated. Table 6-1 added)
- Changed Card ID from 907-SWITCH to 907-FOS
- Changed Appendix C from “Drawings” to “Model 907
Power Current”.
ACC
June 20, 2011
Reference Documents
Document
Number
Document Title and Description
907-0604-00
Model 907 Diagnostics Software Manual, GUI interface for Model 907 cards
that support Ethernet-based diagnostics
700-0271-00
AIB Plug-In Card Manual, describes AIB plug-in modules available for various
analog and digital signal types
700-0739-00
Diagnostics Protocol Manual, describes format of diagnostics data available
from Model 907 systems
907-2xxx-xx
Model 907 Card Configuration Drawings

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TABLE OF CONTENTS
1.0 Introduction........................................................................................................................................... 1-1
2.0 System Overview .................................................................................................................................. 2-1
3.0 Multiplexer Motherboard Cards .......................................................................................................... 3-1
3.1 Standard 907 Multiplexer Motherboard ........................................................................................ 3-2
3.1.1 Remote Multiplexer Card (907-R) ................................................................................... 3-3
3.1.2 Console Multiplexer Card (907-C) ................................................................................... 3-3
3.2 907V Multiplexer Motherboard ..................................................................................................... 3-4
3.2.1 Remote 907V Multiplexer Card (907V-R) ........................................................................ 3-6
3.2.2 Console 907V Multiplexer Card (907V-C) ....................................................................... 3-6
3.3 907Plus Multiplexer Motherboard ................................................................................................. 3-7
3.3.1 Remote 907Plus Multiplexer Card (907+R) .................................................................... 3-9
3.3.2 Console 907Plus Multiplexer Card (907+C) .................................................................. 3-10
3.4 907-HDM2 Multiplexer Motherboard .......................................................................................... 3-11
3.4.1 Remote 907-HDM2 Multiplexer Card (907-HDM2-R) ................................................... 3-14
3.4.2 Console 907-HDM2 Multiplexer Card (907-HDM2-C) ................................................... 3-15
3.5 907-GEM Multiplexer Motherboard ............................................................................................ 3-16
3.5.1 Remote 907-GEM Multiplexer Card (907-GEM-R) ....................................................... 3-18
3.5.2 Console 907-GEM Multiplexer Card (907-GEM-C) ....................................................... 3-19
4.0 Media Converters ................................................................................................................................. 4-1
4.1 907-MC (10/100 Mbps Ethernet) .................................................................................................. 4-2
4.2 907-1394 (Firewire) ...................................................................................................................... 4-3
4.3 907-ECL (Sonar) .......................................................................................................................... 4-4
4.4 907-HDV (HD-SDI) ....................................................................................................................... 4-5
4.5 907-GBE (Gigabit Ethernet) ......................................................................................................... 4-6
4.6 907-GBE2 (Dual Gigabit Ethernet) ............................................................................................... 4-7
4.7 907-GBES (Quad Gigabit Ethernet Switch) ................................................................................. 4-8
5.0 Expansion Cards .................................................................................................................................. 5-1
5.1 907-EIBS (10 Mbps Ethernet Switch Card) .................................................................................. 5-2
5.2 907-232 (8-Channel RS-232 Card) .............................................................................................. 5-3
5.3 907-485 (8-Channel RS-485/422 Card) ....................................................................................... 5-4
5.4 907-SER (8-Channel Serial Data Card) ....................................................................................... 5-5
5.5 907-ADC (8-Channel 8/12 bit ADC Card) .................................................................................... 5-7
5.6 907-DAC (8-Channel DAC Card) ................................................................................................. 5-8
5.7 907-AUDIO (4-Channel, 24-bit Audio Card) ................................................................................. 5-9
5.8 907-AUDIO-T (4- Channel Audio Transformer Card) ................................................................. 5-10
5.9 907-TTL (8-Channel TTL Card) .................................................................................................. 5-11
5.10 907-CIB (4-Channel Control Interface Card) .............................................................................. 5-12
5.11 907-420 (6-Channel 4-20 mA Card) ........................................................................................... 5-13
5.12 907-USB (Universal Serial Bus Card) ........................................................................................ 5-14
5.13 907-AIB (Dual-Socket AIB Adaptor) ........................................................................................... 5-15

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6.0 System Modules ................................................................................................................................... 6-1
6.1 907-EURO (Eurocard Adaptor) .................................................................................................... 6-1
6.2 907-PC104 (907 to Standard PC/104 Adaptor) ............................................................................ 6-3
6.3 907-DC-24 (Isolated DC-DC Power Card) ................................................................................... 6-4
6.4 907-CWDM (CWDM Optics Card) ................................................................................................ 6-5
6.5 907-CWDM-4 (4-Channel CWDM Optics Card) ........................................................................... 6-6
6.6 907-CWDM-8 (8-Channel CWDM Optics Card) ........................................................................... 6-7
6.7 907-FOS (1x2 SMF/MMF Fiber Optic Switch Card) ..................................................................... 6-8
6.8 907-SPLIT (1x2 Optical Splitter Card) .......................................................................................... 6-9
6.9 907-DIAG (Diagnostics Card, LED Driver) ................................................................................. 6-10
6.10 907-DIAG-E (Diagnostics Card, Ethernet) ................................................................................. 6-11
7.0 Fiber Optic System ............................................................................................................................... 7-1
7.1 Safety ............................................................................................................................................ 7-1
7.2 System Design.............................................................................................................................. 7-2
8.0 Installation and Operation ................................................................................................................... 8-1
8.1 Mounting ....................................................................................................................................... 8-1
8.2 Power ............................................................................................................................................ 8-2
8.3 Bench Test.................................................................................................................................... 8-2
8.4 Maintenance ................................................................................................................................. 8-3
8.5 Model 907 Board Handling ........................................................................................................... 8-3
Appendices
Appendix A – Fuses
Appendix B – Model 907 Cards
Appendix C – Model 907 Power Current
LIST OF TABLES
Table 3-1: 907-HDM2 Configuration Options (Defaults Shaded) .................................................................. 3-12
Table 6-1: 907 Cards Compatible with 907-DIAG-E ...................................................................................... 6-12
Table 7-1: Typical ROV System Flux Budget .................................................................................................. 7-2
LIST OF FIGURES
Figure 2-1: Example of a Model 907 Multiplexer System ................................................................................ 2-1
Figure 2-2: Example of a Model 907 Stack ...................................................................................................... 2-2
Figure 3-1: Remote & Console Motherboard Optical Configuration ................................................................ 3-1
Figure 3-2: Standard Model 907 Multiplexer Motherboard with WDM ............................................................. 3-2
Figure 3-3: On board I/O Channels for 907-R and 907-C Multiplexer Motherboard Cards ............................. 3-2
Figure 3-4: 907-R & 907-C Multiplexer Card ................................................................................................... 3-3
Figure 3-5: Model 907V Multiplexer Motherboard ........................................................................................... 3-5
Figure 3-6: On board I/O Channels for 907V-R and 907V-C Multiplexer Motherboard Cards ........................ 3-5
Figure 3-7: 907V-R & 907V-C Multiplexer Card............................................................................................... 3-6
Figure 3-8: Model 907Plus Multiplexer Motherboard ....................................................................................... 3-8
Figure 3-9: On board I/O Channels for 907+R and 907+C Multiplexer Motherboard Cards ........................... 3-8
Figure 3-10: 907+R Multiplexer Card ............................................................................................................... 3-9
Figure 3-11: 907+C Multiplexer Card ............................................................................................................. 3-10

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Figure 3-12: Model 907-HDM2 Multiplexer Motherboard .............................................................................. 3-11
Figure 3-13: On board I/O Channels for 907-HDM2-R and 907-HDM2-C ..................................................... 3-12
Figure 3-14: On board I/O Channels for 907-HDM2-R and 907-HDM2-C ..................................................... 3-13
Figure 3-15: On board I/O Channels for 907-HDM2-R and 907-HDM2-C ..................................................... 3-13
Figure 3-16: 907-HDM2-R & 907-HDM2-C Multiplexer Card ........................................................................ 3-14
Figure 3-17: Model 907-GEM Multiplexer Motherboard ................................................................................ 3-16
Figure 3-18: On board I/O Channels for 907-GEM-R and 907-GEM-C Multiplexer Motherboard Cards ...... 3-17
Figure 3-19: 907-GEM-R & 907-GEM-C Multiplexer Card ............................................................................ 3-18
Figure 4-1: Media Converter Card (907-GBES)............................................................................................... 4-1
Figure 4-2: 907-MC (10/100 Ethernet) Card without WDM ............................................................................. 4-2
Figure 4-3: 907-1394 Media Converter Card ................................................................................................... 4-3
Figure 4-4: 907-ECL Media Converter Card .................................................................................................... 4-4
Figure 4-5: 907-HDV (HD-SDI) Media Converter card .................................................................................... 4-5
Figure 4-6: 907-GBE Media Converter Card ................................................................................................... 4-6
Figure 4-7: 907-GBE2, Dual Gigabit Ethernet Media Converter Card ............................................................. 4-7
Figure 4-8: 907-GBES Media Converter Card ................................................................................................. 4-8
Figure 5-1: 907-EIBS Ethernet Expansion Card .............................................................................................. 5-2
Figure 5-2: 907-232, RS-232 Expansion Card................................................................................................. 5-3
Figure 5-3: 907-485, RS-485/422 Expansion Card ......................................................................................... 5-4
Figure 5-4: 907-SER, Serial Data Expansion Card ......................................................................................... 5-5
Figure 5-5: 907-ADC Expansion Card ............................................................................................................. 5-7
Figure 5-6: 907-DAC Expansion Card ............................................................................................................. 5-8
Figure 5-7: 907-AUDIO Expansion Card ......................................................................................................... 5-9
Figure 5-8: 907-AUDIO-T Expansion Card .................................................................................................... 5-10
Figure 5-9: 907-TTL Expansion Card ............................................................................................................ 5-11
Figure 5-10: 907-CIB Control Channel Expansion Card ................................................................................ 5-12
Figure 5-11: 907-420 Expansion Card ........................................................................................................... 5-13
Figure 5-12: 907-USB Expansion Card ......................................................................................................... 5-14
Figure 5-13: 907-AIB, Adaptable Interface Board Adaptor ............................................................................ 5-15
Figure 6-1: 907-EURO Eurocard Adaptor ........................................................................................................ 6-1
Figure 6-2: 907-EURO Eurocard Adaptor Card Assembly .............................................................................. 6-2
Figure 6-3: 907-PC104, 907 to Standard PC/104 Adaptor .............................................................................. 6-3
Figure 6-4: 907-DC-24 Power Distribution Card .............................................................................................. 6-4
Figure 6-5: 907-CWDM Optics Card ................................................................................................................ 6-5
Figure 6-6: 907-CWDM-4, 4-Channel CWDM Optics Card ............................................................................. 6-6
Figure 6-7: 907-CWDM-8, 8-Channel CWDM Optics Card ............................................................................. 6-7
Figure 6-8: 907-FOS, 1x2 Fiber Optic Switch Card ......................................................................................... 6-8
Figure 6-9: 907-SPLIT, 1x2 Optical Splitter Card ............................................................................................ 6-9
Figure 6-10: 907-DIAG LED Diagnostics Interface Card ............................................................................... 6-10
Figure 6-11: 907-DIAG-E Diagnostics Card ................................................................................................... 6-11
Figure 7-1: Example Optical Configurations .................................................................................................... 7-1
Figure 8-1: Example Model 907 Remote Stack View ...................................................................................... 8-1

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ACRONYMS AND ABBREVIATIONS
The list below contains the acronyms and abbreviations used in this user's guide.
AIB
Adaptable Interface Board
BER
Bit Error Rate
CWDM
Coarse Wavelength Division Multiplexer / Multiplexing
ECL
Emitter Coupled Logic (Vcc = 0V)
EIA
Electronic Industries Association
EIB
Ethernet Interface Board
ESD
Electrostatic Discharge
FC/PC
Ferrule Connector (Threaded optical connector) / Physical Contact
FORJ
Fiber Optic Rotary Joint
FPGA
Field Programmable Gate Array
Gbps
Gigabits Per Second
HD-SDI
High Definition Serial Data Interface
I/O
Input/output
kbps
Kilobits Per Second
LC/PC
Lucent Connector / Physical Contact
LED
Light Emitting Diode
Mbps
Megabits Per Second
MDI/MDIX
Automatic medium-dependent interface crossover
NRZ
Non Return to Zero (Data Signaling)
NRZI
Non Return to Zero Inverted
NTSC
National Television System Committee (North American Composite Video)
P/N
Part Number
PAL
Phase Alternating Line (European Composite Video)
PCB
Printed Circuit Board
PCBA
Printed Circuit Board Assembly
PECL
Positive Emitter Coupled Logic (Vcc = +5 V)
RGB
Red, Green, Blue (Component Video)
ROV
Remotely Operated Vehicle
SFP
Small Form-factor Pluggable (Optical Transceiver)
SMB
Sub-Miniature „B‟ (Connector)
SMPTE
Society of Motion Picture and Television Engineers
SMT
Surface Mount Technology
ST/PC
Straight Tip optical connector / Physical Contact
TDM
Time Division Multiplexer / Multiplexing
TTL
Transistor-Transistor Logic
USB
Universal Serial Bus
VOAT
Variable Optical Attenuator
WDM
Wavelength Division Multiplexer / Multiplexing
Y/C
Luminance/Chrominance (S-Video)
YPbPr
Component Video (Y = luma, Pb = difference between Blue to luma, Pr = difference
between Red to luma)

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1.0 Introduction
Focal Technologies' Model 907 is a compact and rugged video/data multiplexer and fiber optic transmission
system designed for Remotely Operated Vehicles (ROV) and other applications requiring the transmission of
video and/or data over an optical link. The Model 907 has been optimized for low power operation and
delivery of high quality video and data in a standard PC/104 form factor. A flexible design architecture
supports modular reconfiguration and expansion of the multiplexer system by changing or adding cards to the
system.
This document provides Model 907 users with detailed information relevant to the design, configuration,
installation, and operation of the Model 907 Video/Data Multiplexing system. This manual and the appropriate
reference documents should be reviewed prior to installation or reconfiguration of the multiplexer system.
Section 2 provides an overview of the complete Model 907 multiplexer system and the key technologies
employed. Section 3 provides an overview of the Model 907 motherboard modules. Section 4 provides an
overview of the available Model 907 media converter cards. Section 5 describes the available Model 907
expansion cards. Section 6 describes additional system module cards, e.g. optical modules, which further
extend the capabilities of the Model 907 system. Section 7 follows with detailed information on the Model 907
optical system, and Section 8 provides useful installation instructions and preliminary test procedures.
Appendices include lists of fuses, a cross-reference for card configuration drawing and any system specific
information, if provided, such as relevant installation drawings and configuration drawings.

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2.0 System Overview
Model 907 systems are built up from four main types of cards: motherboards, expansion cards, media
converters, and system module cards. A Model 907 system consists, as a minimum, of a Model 907 remote
motherboard (multiplexer), intended for installation at the ROV or subsea end, and a Model 907 console
motherboard, intended for installation at the shipboard or surface end. Expansion cards may be stacked on
top of motherboards to provide increased number of data channels or add signal formats not supported by the
motherboard directly.
Motherboards combine several video and/or data channels into a single, high-speed optical link. Video and
data signals input at the remote motherboard and attached expansion cards are time division multiplexed
(TDM) into a single, high-speed optical uplink. Similarly, data signals at the console end are combined via
TDM into a single, high-speed optical downlink.
The uplink and downlink are typically combined on a single fiber – singlemode or multimode – with a passive
optical coupler known as a wavelength division multiplexer (WDM). Basic systems usually operate with a
1310 nm uplink and 1550 nm downlink. In larger systems, multiple stacks of 907 cards may be combined on a
single fiber using a coarse wavelength division multiplexer (CWDM) to take advantage of the high bandwidth
of optical fiber.
Figure 2-1 illustrates an example of a system configuration using a standard, standalone 907 motherboard,
which supports the multiplexing of three channels of video and six channels of bidirectional data over a single
optical fiber using WDM, in this example, passed through a fiber optic rotary joint (FORJ). Typically several
connectors, not shown, would add 1-3 dB of loss.
OPTICAL CABLE
(UP TO 10 KM)
FORJ
(WINCH DRUM)
VIDEO
REMOTE MODULE
(ROV OR REMOTE SITE)
CONSOLE MODULE
(SHIP OR CONTROL SITE)
DATA
DATA
VIDEO
Figure 2-1: Example of a Model 907 Multiplexer System
Model 907 media converter cards provide direct conversion of a single, high-speed electrical channel, such as
Gigabit Ethernet, into optical signaling at one end of the system, and conversion back into the original data
format at the other. Media converters can be used as standalone cards or can be assembled in a stack with a
motherboard. CWDMs can be added to combine optical signals from multiple media converters, and/or the
motherboard, onto a single optical fiber.

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An example of a Model 907 stack is shown below in Figure 2-2, in this case a Model 907V motherboard
(907-V) with two 8-channel RS-485 expansion cards (907-485).
Figure 2-2: Example of a Model 907 Stack

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3.0 Multiplexer Motherboard Cards
Both the remote and console ends of the optical link incorporate a 907 motherboard. The motherboards
multiplex video and/or data channels, transmit the combined data over the optical link, demultiplex received
data from the optical link, store system diagnostic data, and provide power to other cards in the stack. All
motherboards can be operated as standalone cards or be assembled together in a stack including
907 expansion cards, media converter cards, and system modules.
Motherboards are typically supplied with a singlemode or multimode wavelength division multiplexer (WDM)
for operation over a single fiber, or without a WDM for two-fiber links. In the case of two-fiber communications,
optical multiplexing can be provided on another card in the stack, or the two-fibers can be used to link directly
from a remote motherboard to a console motherboard. On-board and off-board optical multiplexer
configurations are illustrated in Figure 3-1. Furthermore, motherboards may be configured to use CWDM
wavelengths and couplers to allow data/video from other cards, which have their own optical transceivers, to
be combined on the same optical fiber.
Remote
BackPlane
Serial Data I/O
Electrical
MUX
Optical Tx/Rx
Data/Video I/O
Optical MUX
907
Motherboard
(Optional)
Optical MUX Optical MUX
Console
BackPlane
Serial Data I/O
Electrical
MUX
Optical Tx/Rx
Data/Video I/O
Optical MUX
907
Motherboard
(Optional)
Figure 3-1: Remote & Console Motherboard Optical Configuration
The flexibility of the optical link between motherboards enables a wide range of application requirements.
Cards configured to use singlemode, high-power, and high-sensitivity CWDM transceivers satisfy large-
bandwidth, long-distance data and video transfer applications, whereas cards configured to use multimode,
low power, and low-sensitivity transceivers satisfy applications requiring lower bandwidth, shorter distance,
and lower cost.
Model 907 cards are available in pressure tolerant versions with up to 6000 psi rating.

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3.1 Standard 907 Multiplexer Motherboard
The 907 motherboard multiplexes three unidirectional (typically remote to console) video channels, and six
bidirectional serial data channels (four RS-232 and two high-speed RS-485/422). Each video channel
provides 5.5 MHz bandwidth for NTSC and PAL composite signals, S-video (Y/C), and RGB formats.
Typically all three video channels are set for 8-bit video resolution, but they can be switch configured for two
10-bit channels. Refer to the configuration drawing 907-2001-00 for details.
Each of the two RS-422/RS-485 data channels support NRZ rates up to 2.5 Mbaud, and each of the four RS-
232 channels support up to 120 Kbaud. The RS-422/RS-485 channels 5 and 6 can be configured for simplex
or duplex communication, and the user can enable autosense on these channels for RS-485 traffic.
In addition, these two channels, which are default configured for RS-485 with autosense, can be configured
instead for TTL formatted data or a configuration suitable for AC-coupled RS-485, such as used by a Kraft
manipulator telemetry links.
Figure 3-2 shows a standard Model 907 multiplexer motherboard with an external wavelength division
multiplexer (WDM) and Figure 3-3 shows the input/output (I/O) channels for the standard Model 907-R and
907-C multiplexer cards.
Figure 3-2: Standard Model 907 Multiplexer Motherboard with WDM
OPTICAL CABLE SYSTEM
VIDEO IN
RS-232
CH1
VIDEO INCH2
VIDEO INCH3
CH1
RS-232CH2
RS-232CH3
RS-232CH4
REMOTE
(907-R)
RS-485/422/TTLCH5
RS-485/422CH6
DATA
CONN
A
DATA
CONN
B
DATA
CONN
C
VIDEO OUT
RS-232
CH1
VIDEO OUT CH2
VIDEO OUT CH3
CH1
RS-232 CH2
RS-232 CH3
RS-232 CH4
CONSOLE
(907-C)
RS-485/422/TTL CH5
RS-485/422 CH6
DATA
CONN
A
DATA
CONN
B
DATA
CONN
C
Figure 3-3: On board I/O Channels for 907-R and 907-C Multiplexer Motherboard Cards

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3.1.1 Remote Multiplexer Card (907-R)
Card P/N
907-0001-XX
Config. Dwg.
907-2001-00
Diagnostics:
LEDs Only
The 907-R is the remote half of the multiplexer motherboard set. Optical fiber routing may vary from assembly
to assembly, however a fiber bend radius of more than 16 mm should be maintained at all times. The remote
units may be configured with no WDM, with a singlemode WDM, or with a multimode WDM. Fiber access is
typically via an ST/PC bushing in the middle of the card, though FC/PC options are available. If no WDM is
required, fiber inputs and output fibers are connected directly to the optical transceiver Rx (receiver) and Tx
(transmitter) ports. A 907-R configuration using a WDM is shown in Figure 3-4.
Figure 3-4: 907-R & 907-C Multiplexer Card
All three SMB video connectors have a 75-ohm input impedance. The input video signals are streamed
through the optical link to the output video connectors of the 907-C card. Three 8-pin Molex connectors are
used for the six bidirectional data channels.
3.1.2 Console Multiplexer Card (907-C)
Card P/N
907-0002-XX
Config. Dwg.
907-2001-00
Diagnostics:
LEDs Only
The 907-C is the console half of the 907 motherboard pair and as with the 907-R, fiber access is typically via
an ST/PC bushing in the middle of the card, though FC/PC options are available. A 907-C configuration using
a WDM is shown in Figure 3-4. The 907-C has video connector outputs and the 907-R has video connector
inputs.
All three SMB video connectors have a 75-ohm output impedance (AC-coupled) and provide the output video
received from the input video connectors of the 907-R card. Three 8-pin Molex connectors are used for the six
bidirectional data channels.
For more details about the 907-R and 907-C multiplexer cards, please refer to configuration drawing
907-2001-00.

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3.2 907V Multiplexer Motherboard
The 907V (Video) multiplexer motherboards have six on-board video channels for unidirectional (remote to
console) transmission of NTSC/PAL, Y/C (S-video), RGB, and YPrPb video formats. Although the 907V does
not have any on-board data channels, it can multiplex up to six stacked expansion cards via the PC/104
backplane data ports.
The 907V multiplexer motherboard uses a small form-factor pluggable (SFP) optical transceiver for quick and
reliable configuration of optics and an array of board-edge LEDs for diagnostic purposes. Both uplink and
downlink run at 1200 Mbaud with various wavelength options available. Typical optical power budgets are 20
dB or greater. In higher budget systems, a minimum of 5 dB attenuation is recommended for bench testing to
ensure the receivers are not saturated. The 907V is recommended for singlemode operation only, although
short multimode links are possible (< 500 m) with appropriate transceivers.
Each 907V is switch-configured to provide data and video multiplexing. Switch SW1 is used to select one of
the following modes:
Six channels of 8-bit, unidirectional video combined with six bidirectional data ports via the PC/104
backplane (default configuration)
Four channels of 10-bit, unidirectional video, combined with six bidirectional data ports via the PC/104
backplane
Six channels of 10-bit, unidirectional video, with no data ports via the PC/104 backplane
Since there is no bidirectional requirement when configured in the six 10-bit video channel mode, only a
single uplink fiber is required and an optical WDM is not needed unless the card is part of a CWDM
configuration.
Switch SW1 on both the remote and console cards is used to set the video/data mode and optical
configuration described above. Switch SW2 configures the input video format from any one of eight possible
arrangements. Details of the video format options are described in the configuration drawing 907-2026-00.
The 907V remote is available in pressure tolerant versions with up to 6000 psi rating.

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Figure 3-5 shows a 907V multiplexer motherboard and Figure 3-6 shows the I/O channels for the 907V-R and
907V-C multiplexer motherboard cards.
Figure 3-5: Model 907V Multiplexer Motherboard
OPTICAL CABLE SYSTEM
VIDEO INCH6
VIDEO INCH5
VIDEO INCH4REMOTE
(907V-R)
VIDEO INCH3
VIDEO INCH2
VIDEO INCH1 VIDEO OUT CH6
VIDEO OUT CH5
VIDEO OUT CH4
CONSOLE
(907V-C)
VIDEO OUT CH3
VIDEO OUT CH2
VIDEO OUT CH1
Figure 3-6: On board I/O Channels for 907V-R and 907V-C Multiplexer Motherboard Cards

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3.2.1 Remote 907V Multiplexer Card (907V-R)
Card P/N
907-0023-XX
Config. Dwg.
907-2026-00
Diagnostics:
907-DIAG-E Compatible
Figure 3-7 shows top and side views of the 907V-R remote multiplexer card. The backplane PC/104
connector allows stacking of other PC/104 form-factor cards. A standard two-pin Molex power connector is
used for a +5 VDC power input, which includes a fuse and protection from reverse polarity and overvoltage.
Typical current draw is 0.7 A from a +5 VDC supply.
An array of diagnostic LEDs indicate board status. The Video Sync LEDs are green when proper video sync
is detected and red or orange when the input voltage is out of range, i.e. exceeds 1.5 Vpp. The Optical Link
LED is on when the card is receiving sufficient optical power and valid frames from the console. The Power
LED is on when the input power voltage is above 4 V.
Figure 3-7: 907V-R & 907V-C Multiplexer Card
All six SMB video connectors have a 75-ohm input impedance, AC-coupled. The input video signals are
streamed to the output video connectors of the 907V-C card via the optical link.
3.2.2 Console 907V Multiplexer Card (907V-C)
Card P/N
907-0024-00
Config. Dwg.
907-2026-00
Diagnostics:
907-DIAG-E Compatible
The card views for the 907V-C multiplexer card are identical to the 907V-R shown in Figure 3-7. The console
card electrical interfaces, optical interfaces, and switch configurations are all identical to the remote except at
the video connectors, which are outputs on the console and inputs on the remote. Output impedance for each
video connector is 75 ohms, AC-coupled.
A 907-DIAG-E diagnostic card may be stacked with the 907V-C to obtain critical system diagnostics of both
the remote and console stacks through an Ethernet interface. Details of the 907-DIAG-E card are provided in
the System Modules section.

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3.3 907Plus Multiplexer Motherboard
The 907Plus (907+) multiplexer motherboard supports four unidirectional video channels, six dedicated
bidirectional serial channels (4 x RS-232, 2 x RS-485), and up to six expansion cards via the PC/104 data
ports. The six on-board serial channels are always available and are not disabled by adding expansion cards.
The 907Plus motherboard uses a small form-factor pluggable (SFP) optical transceiver for quick and reliable
configuration of optics and an array of board-edge LEDs for diagnostic purposes. Both uplink and downlink
run at 1200 Mbaud with various wavelength options available. Typical optical power budgets are 20 dB or
greater. In higher budget systems, a minimum of 5 dB attenuation is recommended for bench testing to
ensure the receivers are not saturated. The 907Plus is recommended for singlemode operation only, although
short multimode links (< 500 m) are possible.
Switches on the board set the signal format of the four video channels and the two RS-485 channels. The four
on-board RS-232 channels do not require configuration. By default, the card is configured for four channels of
NTSC/PAL composite video signals, however the system can be configured to support one RGB channel and
one composite channel, two Y/C (S-Video) channels, or one YPrPb and one composite channel. The two
on-board RS-485 channels can also be configured to operate as a single RS-422 channel and may be used
with or without a transmission timeout. Detailed video and data settings are described by the configuration
drawings 907-2035-00 (907+R) and 907-2036-00 (907+C).
Each of the RS-485 channels (CH1 & CH2) is galvanically isolated, data and power, from all other channels
and from the main board ground, which is the +5 V power ground. The RS-232 channels are isolated in pairs,
with channels 3 and 4 sharing a common isolated ground and channels 5 and 6 sharing a different isolated
ground. The video channels all share a common ground, which is connected to the on-board power ground.
If isolation is required for the video channels, a high quality video isolation transformer is recommended.
The 907Plus remote is available in pressure tolerant versions with 6000 psi rating.

907-0601-00 Rev. C Model 907 Video/Data Multiplexer – User’s Guide
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Figure 3-8 shows a 907Plus multiplexer motherboard and Figure 3-9 shows the I/O channels for the 907+R
and 907+C multiplexer cards.
Figure 3-8: Model 907Plus Multiplexer Motherboard
OPTICAL CABLE SYSTEM
VIDEO INCH4
REMOTE
(907+R)
VIDEO INCH3
VIDEO INCH2
VIDEO INCH1
2 x RS-485
or
1 x RS-422
RS-232 CH6
RS-232
CH5J4 RS-232
RS-232
CH4
CH3
J2CH1&2 VIDEO OUT CH4
CONSOLE
(907+C)
VIDEO OUT CH3
VIDEO OUT CH2
VIDEO OUT CH1
2 x RS-485
or
1 x RS-422
RS-232 CH6
RS-232
CH5
J4
RS-232
RS-232
CH4
CH3
J2 CH1&2
Figure 3-9: On board I/O Channels for 907+R and 907+C Multiplexer Motherboard Cards

907-0601-00 Rev. C Model 907 Video/Data Multiplexer – User’s Guide
Focal Technologies Corp. Page 3-9
3.3.1 Remote 907Plus Multiplexer Card (907+R)
Card P/N
907-0025-00
Config. Dwg.
907-2035-00
Diagnostics:
907-DIAG-E Compatible
Figure 3-10 shows top and side views of the 907Plus remote card. The backplane PC/104 connector allows
stacking of other PC/104 form-factor cards. A standard two-pin Molex power connector is used for a +5 VDC
power input, which includes a fuse and protection from reverse polarity and overvoltage. Typical current draw
is 0.7 A from a +5 VDC supply.
The 907Plus has an array of diagnostic LEDs for Power, Link Ready, Optical Data Tx and Rx, Video Sync for
each video channel and Data I/O Activity for each on-board data channel. The Power LED is on when the
input power voltage is above 4V. The Video Sync LEDs are green when proper video sync is detected and
red or orange when the input voltage is out of range, i.e. exceeds 1.5 Vpp. The optical Link Ready LED is on
when the card is receiving sufficient optical power and valid frames from the console. Data LEDs are red
when receiving data and green when transmitting data. Optical Rx/Tx LEDs indicate valid links to the SFP
transceiver.
Figure 3-10: 907+R Multiplexer Card
Note: The mating video connectors and cables should be 75-ohm impedance.

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3.3.2 Console 907Plus Multiplexer Card (907+C)
Card P/N
907-0026-00
Config. Dwg.
907-2036-00
Diagnostics:
907-DIAG-E Compatible
Top and side views of the 907Plus console card are shown in Figure 3-11. The 907Plus console card is
nearly identical in electrical and optical design in that all LEDs, both switches, the power interface, and data
faces are identical to that described for the remote 907Plus, except at the video connectors, which are
outputs on the console and inputs on the remote.
A 907-DIAG-E diagnostic card may be added to the same stack as the 907+C to obtain critical system
diagnostics of both the remote and console stacks through an Ethernet interface. Details of the 907- DIAG-E
card are provided in the System Modules section.
Figure 3-11: 907+C Multiplexer Card
Note: The mating video connectors and cables should be 75-ohm impedance.

907-0601-00 Rev. C Model 907 Video/Data Multiplexer – User’s Guide
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3.4 907-HDM2 Multiplexer Motherboard
The 907-HDM2 multiplexer motherboards support up to two HD-SDI channels, 4 bidirectional serial data
channels that are switch configured for either RS-232 or RS-485 and up to six expansion cards via the
PC/104 data ports. The four on-board serial channels are always available and are not disabled by adding
expansion cards. RS-422 is only available as a factory modification. This card is compatible with SMPTE-292
signals on coaxial cable, which includes 720p, 1080i and 1080p formats.
The 907-HDM2 motherboard uses a small form-factor pluggable (SFP) optical transceiver for quick and
reliable configuration of optics and an array of board-edge LEDs for diagnostic purposes. The SFP
transceiver used in this card supports high optical data rates of up to 3.125 Gbaud. Typically optical budgets
are 20 dB or greater. In higher budget systems a minimum of 5 dB attenuation is recommended for bench
testing to ensure receivers are not saturated. The 907-HDM2 is recommended for singlemode operation only.
Please refer to configuration drawing 907-2052-00 for more information.
Figure 3-12 shows a 907-HDM2 multiplexer motherboard.
Figure 3-12: Model 907-HDM2 Multiplexer Motherboard