Abstract: Method and apparatus for determining loss of a received frequency modulated carrier wherein the receiver includes a limiter and discriminator and generates an AGC voltage for controlling the gain of the receiver and producing an output signal from the discriminator having an output bandwidth in excess of that required for the information channel. The unused portion of the output bandwidth is used to sample the noise level voltage through a narrow band filter which upon reaching a selected magnitude provides an indication of the loss of the carrier. The invention, in another aspect, includes a gate control of the AGC voltage which for high signal values interrupts the action of the video networks deriving the noise level voltage.

Abstract: A multicoupler for coupling a single energy source to a plurality of utilization devices including an impedance transformer connected to the source and driving at least one active device such as a pair of series connected emitter followers, a plurality of isolation networks each connected to the output of the active device with each of said isolation networks providing an output for at least one utilization device, and structural arrangements for connection of the isolation networks to the output of the active device to minimize undesirable inductive effects.

Abstract: A multicoupler for coupling a single energy source to a plurality of utilization devices including an impedance transformer connected to the source and driving at least one active device such as a pair of series connected emitter followers. A plurality of isolation networks are each connected to the output of the active device and each of said isolation networks provides an output for at least one utilization device.