903HD Multiplexer

The high density 903HD remote module provides the features of a fullsized subsea video/data multiplexer in a package of half the volume. This reduction enables installation in constrained spaces while supporting transmission of 4-8 high quality video channels and 8-16 bidirectional data channels over a single optical fiber. Since the 903HD uses the same FMB-X-2.5 fiber multiplexer boards (FMBs) as the standard 903, including CWDM versions, it supports singlemode or multimode fiber as well as dual fiber operation with automatic fiber switching. Data channels are easily configured with plug-in modules for various data formats. A standard 903 console module at the surface includes powerful diagnostics software with realtime display and logging of critical remote/console parameters.


  • Less than half the size of the standard FO903
  • Wide range of supported video and data formats
  • Highest quality digitized video
  • Singlemode and multimode fiber options
  • Extensive diagnostics monitors power system, video, data, temperature and fiber-optic link


  • Easily reconfigured at card level and individual channel level
  • Diagnostics verifies health of umbilical and tether cables
  • Continually updated with the newest data formats, including HD-SDI, and Gigabit Ethernet, to provide an extended upgrade path
  • Custom interfaces available
  • Successful operation assured by factory acceptance tests at extremes and 20 years of experience providing technical
    support for fiber optic systems
903HD Specifications
No. Channels 4 per HDB-TX card
Format NTSC, PAL (optional Y/C, RGB)
Digitization 10-bit
Bandwidth > 6 MHz
SNR > 60 dB (62 dB typical)
RS-232 4 channels per HDB-TX (120 kbps NRZ)
AIB Modules 4 plug-in modules per HDB-TX card
LEDs Power (electrical), optical link, optical fault, Ethernet port status,
serial data Tx/Rx, video sync, over temperature limit
Ethernet to PC Diagnostics from remote and console through Ethernet port on console FMB
Optical Fiber 1 or 2 singlemode (9/125 µm) or multimode
(50/125 µm and 62.5/125 µm)
Baud Rate FMB-X-2.5: 2.5 Gbaud uplink/downlink
Wavelengths 1310/1550 nm, CWDM (1471-1611 nm)
Flux Budget > 20 db (24 db typical)
Chassis* Eurocard 3U subrack, 12 HP and 16 HP
CBP-100-MR uses CBP-121-MC console
CBP-200-MR uses CBP-241 HC console
Weight* < 2 kg (4.4 lb), CBP-100-MR (typical)
< 3 kg (6.6 lb), CBP-200-HR
Optical ST/PC (FC/PC optional)
Video SMB
Data 4-pin WAGO Gage Clamp, data I/O box or ribbon cable (optional) at front panel
Diagnostics DB-9S (Console Module)
Temperature -10°C to +60°C (operational)
-20°C to +85°C (storage)
Humidity 85% RH, noncondensing
Vibration 5 g, 25-1000 Hz, 3 axes
Shock 30 g, 11 ms half sine, 3 axes
*See Model 903 multiplexer data sheet for console module specifications.

Contact Us

Technical Support

Telephone:  +1-902-468-2263

Typical Applications

  • Workclass Remotely Operated Vehicles (ROVs)
  • Defense systems
  • Subsea mining