Narrow band simulcast system having low speed data distribution

Claim 1

In a radio frequency communications system having plural spatially separated RF transmitters all transmitting substantially the same signal at substantially the same radio frequency, said system distributing a common clocking signal to each of said plural transmitters so as to facilitate a substantially simultaneous signal transmission by said plural transmitters and also distributing message data and control signal data to each of said transmitters over a high-speed data channel from a central control point, said central control point including: switching circuitry which controls routing of either high speed or low speed data transmitted over a single high speed data channel from said central control point to each of said RF transmitters in response to said control signal data; and, each of said plural RF transmitters including: a first circuit arrangement which determines, at least in part, timing of high-speed digital data signal transmissions received from said central point over a high speed data channel; a second circuit arrangement operatively coupled to said first circuit arrangement, which suspends operation of said first circuit in response to said control signal indicating the transmission of low speed-data; and a third circuit arrangement which provides both high-speed and low-speed data to RF power transmitting circuitry.