Point-to-Multipoint Video Links (OMNILINK product family)
The basic system operates in the unlicensed 5740-5860 MHz ISM band and can be used at line-of-sight distances of up to 15 Kilometers, depending on options.
The system transmits one NTSC or PAL video channel with stereo or mono audio. Simultaneous transmissions of multiple channels from one of from several mobile TV stations to the same central base station are possible because each transmitter can be tuned to any one of several channels within the band.
The link has an omnidirectional receive antenna so that signals can be transmitted from anywhere within line of sight of the receiver without the need to point the receive antenna towards the transmitter. The transmit antenna is provided with mounting hardware to facilitate antenna pointing.
Following is a simple diagram of a point to multipoint video link (Omnilink):