SUNNYVALE, Calif. -- Harmonic Inc. (Nasdaq: HLIT) today introducing the world's first node-based, DWDM, tunable, return path transmitters for HFC networks. Using these transmitters, operators may reduce operating costs and dramatically increase the upstream capacity of a single fibre to support the growing array of bandwidth-intensive and interactive applications, such as high-speed Internet access, cable telephony, video-on-demand and interactive multi-user games. The new tunable digital return transmitter family consisting of nine temperature-hardened models, each of which can be hosted in any of Harmonic's PWRBlazer(tm) node platforms, is a key element of a complete high-bandwidth network solution. This solution allows operators to build and manage more cost-effective and scalable two-way communications systems based on a Hybrid Fibre/Coaxial (HFC) CATV network. Each NDT 3059A model uses a wavelength adjustable, isolated, cooled DFB laser that can be tuned in blocks of 4 adjacent wavelengths for support of up to 36 different wavelengths on the ITU grid. This allows flexible field repair options for the HFC network while lowering the cost of adding of new wavelengths and stocking spares. "The NDT 3059A enables MSOs to optimise the capacity, flexibility, and return-on-investment of their HFC infrastructure," said Eric Schweitzer, senior director of product marketing for Harmonic's Broadband Access Networks division. "As the demand for bandwidth-intensive and interactive applications increases, return path capacity either enables or impedes access to new revenue opportunities. The completeness and robustness of our broadband products and solutions, such as the NDT 3059A, allow MSOs to more fully realise their business goals." Harmonic Inc.