Dielectric Introduces New “Hot-Switchable” HDR Dibrid™ IBOC Combiner
January 27, 2005

by -- Dielectric

Dielectric Communications today announced the introduction of the HDR Dibrid™ combiner. The Dibrid facilitates in-band on-channel (IBOC) radio broadcasts that combine analog and dual sideband digital signals. Because the Dibrid does not use switches, it permits “hot switching” that keeps broadcasters on the air as functions are changed while also extending the operating life of transmitter components.

“Prior to the introduction of our Dibrid, radio stations had to use fixed combiners and a number of switches to provide HD radio broadcasts,” said John Chapman, vice president and general manager of Dielectric’s broadcast products. “This was an inflexible solution, and anytime there was a transmitter issue that required the broadcaster to change functions, the station had to go off the air. Our new Dibrid combiner applies conventional components from pre-existing military technology to provide broadcasters with a more versatile way to change functions without an interruption in service.”

By manipulating the functions appropriately, the operating life of many parts of the transmitter station can be extended considerably, resulting in a substantial reduction in operating costs. Dielectric has further streamlined broadcast operations by incorporating an on-board control for local or remote operation, allowing broadcasters to change functions on the Dibrid without traveling to the transmitter site.

Dielectric delivers the Dibrid as a stand-alone unit with two inputs and two outputs, which gives it the versatility to be utilized with a variety of transmitter combinations. Depending on the function, one transmitter or a combination of the two can be connected to the combiner’s inputs, while one output is attached to an antenna and the other to a station dummy load. Transmission modes can be set up to direct either the analog transmitter, digital transmitter, or a combination of both in a variety of different ratios to the antenna, with the residual power directed to the station load


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