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30 July 2013

Emcore launches Medallion 8000 1550nm directly modulated CATV transmitter

Emcore Corp of Albuquerque, NM, USA, which makes components, subsystems and systems for the fiber-optic and solar power markets, has launched its Medallion 8000 series 1550nm directly-modulated DWDM cable television (CATV) transmitter.

Medallion 8000 is the latest addition to Emcore's 1550nm CATV fiber optic transmitter portfolio and is designed for wideband applications that require both CATV and Satellite-Intermediate Frequency (SAT-IF) signals to be transmitted over fiber lengths up to 30km. This facilitates network designs that use a single transmitter to carry multiple signals, while lowering costs, system complexity and rack space requirements, says the firm.

The transmitter supports 79-channel NTSC analog signals and/or a combination of Quadrature Amplitude Modulation (QAM) and SAT-IF signals with a reduced number of CATV analog channels. It features fixed fiber length options of 0—10km, 5—15km, 10—20km and 15—25km with a maximum of 18dBm Stimulated Brillouin Scattering (SBS) suppression, and is also available with a selectable fiber length option. The selectable fiber length option allows the user to set the Medallion 8000 for best optimized CSO (Composite Second Order) distortions at any fiber length from 0—30km in 1km increments and has a maximum SBS suppression of 20dBm.

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 1002MHz. 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 2700MHz for FTTP (Fiber-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 fiber," said Jaime Reloj, VP of business development. "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 fiber 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 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.

Tags: Emcore CATV transmitter


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