Denver, CO (November 21, 2005)–November 9, 2005 marked a historic day in radio history when Colorado Public Radio’s Denver flagship station KVOD-FM became the first station to broadcast “Exgine” technology using iBiquity Corporation’s Generation 3 technology with the new Harris FlexStar HDX-FM exciter.
Pictured (l-r): George Cabrera, Harris lead design engineer on FlexStar, Allen Stewart, director of RF engineering for Colorado Public Radio, and Gary Liebisch, product line engineer at Harris atop Lookout Mountain. The equipment rack shows the new Harris FlexStar HDX-FM on the top, then the older Harris DexStar exciter and a Harris Intraplex HD STL Plus. The HD Radio portion of the broadcast is sent over a UDP (unidirectional protocol) IP LAN extension card, while the analog is on a conventional Intraplex audio card, both on the same T1 line. “Exgine” allows FM stations to place the audio codec, multiplex function, and AAS data equipment related to multicasting from the studio rather than the transmitter site. In addition, KVOD began multicasting its sister AM station’s NPR news/talk KCFR on HD Channel 2.
The multiple outputs of the exciter enable KVOD to use separate ports to send the digital signal to the digital transmitter, and the analog signal to the analog transmitter. KVOD uses its digital transmitter as backup, allowing the station to assign both analog and digital signals to its digital transmitter in the event of an analog transmitter failure.