Product Documentation:

3998 Series 1550 nm Fiber Optic Transmitter

This product line is a family of state-of-the-art high-performance 1550 nm externally-modulated CATV fiber optic transmitters optimized for varying network applications. Packaged in convenient 1 RU housing, this line of optical transmitters couples high optical output powers, up to 11.0 dBm, with low optical line width resulting in unmatched performance. The optical modulator, combined with proprietary predistortion circuitry, provides superior CTB and CSO performance with SBS suppression levels of greater than 21 dBm. Advanced features such as built in field adjustable SBS control and electronic dispersion compensation allow these transmitters to be quickly optimized in the field for any link or application without the need to procure specifically tuned transmitters. This affords the system designer a level of flexibility previously unknown in the CATV market place.

3998 Series 45MHz – 1003 MHz 1550 nm Externally Modulated CATV Transmitter


  • Single or dual optical outputs
  • QAM Loading to 1003 MHz
  • Dual power supplies, redundant & hot swappable
  • Front panel RF test point
  • SNMP control interface
  • Vacuum fluorescent status display
  • OMI/RF gain adjustment
  • AGC select: CW, video, manual (No AGC)
  • Industry-leading field adjustable SBS suppression
  • Field adjustable electronic dispersion compensation (EDC)


  • High-performance supertrunking links
  • High power distribution networks
  • Redundant ring architectures
  • FTTx networks
  • RFOG applications
  • SAT-IF Transport
  • DWDM node splitting