Passive Devices' PDI-60ENC Scrambling Encoder offers the CATV operators a cost effective method for providing premium channel security. Utilizing a new design, the PDI-60ENC injects two specially modulated jamming carriers into the composite IF loop of the television modulator or processor. These jamming carriers have both AM and FM characteristics which scramble the video and place an annoying noise in the audio. Decoding filters unscramble the channel by removing the jamming carriers.