CCTR AM-FM CARRIER CURRENT TRANSMITTER SYSTEM

This transmitter operates in the 200-350 kHz range and is used to send audio signals to a remote receiver via the AC power lines. Either FM or AM modulation modes may be generated. FM is superior with regard to noise but AM modulation enables the use of simple low cost receivers.Two power levels are available in the FM mode. Effective range depends mainly on the AC wiring and how it is connected in the building, the type of system employed (AM or FM) and the allowable signal to noise ratio, as well as the presence of any RF interference from sources such as motors, flourescent lamps, triac and SCR operated devices (i.e. lamp dimmer switches), microprocessor devices, computer systems, and TV sets. All these devices can generate RF interference in the 200-350 kHz range. Another factor is the route the signal must take to the receiver, but most residential applications should experience no difficulty. The kit includes the PC board and all components that mount on it. A 24 VAC transformer and mounting case are required in addition to the kit components. These items depend on individual application and are purchased separately.