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Emcore unveils 1550 nm directly-modulated CATV transmitter

The GaInAsP (gallium indium arsenide phosphide) device comes in a number of fixed fibre length options up to 25 km. They are ideal for extending traditional hybrid fibre coaxial CATV systems

The Medallion 8000 is the latest addition to Emcore's 1550 nm CATV fibre optic transmitter portfolio.

It is designed for wideband applications that require both CATV and Satellite-Intermediate Frequency (SAT-IF) signals to be transmitted over fibre lengths up to 30 km.

This facilitates network designs that use a single transmitter to carry multiple signals, while lowering costs, system complexity and rack space requirements.

The Medallion 8000 supports 79-channel NTSC analogue signals and/or a combination of Quadrature Amplitude Modulation (QAM) and SAT-IF signals with a reduced number of CATV analogue channels.

It features fixed fibre length options of 0 - 10 km, 5 - 15 km, 10 - 20 km and 15 - 25 km with a maximum of 18 dBm Stimulated Brillouin Scattering (SBS) suppression, and is also available with a selectable fibre length option.

The selectable fibre length option allows the user to set the Medallion 8000 for best optimized CSO (Composite Second Order) distortions at any fibre length from 0 - 30 km in 1 km increments and has a maximum SBS suppression of 20 dBm.

The Medallion 8000 family of transmitter products is designed to support various CATV transmitter applications with a common platform. A 75 ohm CATV RF video input supports frequencies up to 1002 MHz. Design features including low chirp control, noise suppression circuitry, and patented pre-distortion technology that provides outstanding performance with Emcore'S wide range of cooled broadband directly-modulated lasers. A second 75 ohm RF input supports frequencies up to 2700 MHz for FTTP (Fibre-To-The-Premises), SAT-IF, and wireless applications.                                                                                                                     

"The new Medallion 8000 directly-modulated transmitter family builds on the strengths of our popular Medallion 6000 externally-modulated series and augments our offering for concurrent transmission of CATV and SAT-IF signals over fibre," says Jaime Reloj, Vice President of Business Development for Emcore.

"Network providers are demanding high-quality, economical delivery of video to their customers, while extending capacity and improving network management intelligence. The Medallion 8000 series transmitters are ideal for extending traditional hybrid fibre coaxial CATV systems, for RF overlay for FTTP, and for RFoG (Radio Frequency over Glass) projects in countries around the world."                                                                                                                                

Monitoring and configuration of the Medallion 8000 is supported by Emcore's latest generation Web GUI, Telnet and Simple Network Management Protocol (SNMP) software via a convenient front panel display, RS-232 port, and Ethernet port.

The feature-rich WEB GUI and latest SNMP enhancements bring a whole suite of advanced operator monitoring and configuration options to the platform, allowing for secure, simplified and future-ready functionality for the next generation of intelligent networks.

The Medallion platform is mechanically designed for flexibility and space efficiency including universal rack-mount features, modular front panel design for private label convenience, and optional front and rear port placement. Dual-redundant field-replaceable fans and power supplies are standard.
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