Television signal distribution equipment for a cable network and including a stabilizer

Television signal distribution equipment for a cable network including a voltage controlled oscillator for generating synchronizing signals, at least one signal processing circuit (2A) suitable for transmitting signals over a channel of the network, said signal processing circuit operating in response to the synchronizing signals generated by said voltage controlled oscillator (7), the distribution equipment comprising at least one receiver (4) receiving external interfering synchronization signals, at least one stabilizer (1) having inputs connected to receive synchronizing signals from the voltage controlled oscillator (7), transmitted signals from the signal processing circuit (2A), and the synchronization signals at an output of the signal receiver (4) for generating DC signals representative of the frequency and phase differences between the synchronizing and synchronization signals, and having an output connected to a voltage sensitive tuning component of said oscillator (7) for locking the synchronizing signals generated by said oscillator (7) to the frequency of the external interfering synchronization signals received through said receiver (4).

Television signal distribution equipment for a cable network including a plurality of signal processing circuits (2A, 2B, 2C) suitable for simultaneously transmitting signals over different channels of the network, and whose respective transmission frequencies are obtained by multiplication of a master oscillator frequency, the distribution equipment comprising at least one stabilizer (9) for eliminating disturbances in the synchronizing signals of one of said signal processing circuits (2A) caused by interference from signals due to intermodulation between synchronizing signals from other signal processing circuits (2B, 2C) in said distribution equipment, at least one multiplier unit (29) for producing signals at the same frequency as the interfering intermodulation signals, the stabilizer (9) having inputs connected to receive synchronizing signals from one of said signal processing circuits (2A) and to an output of one of said multiplier units (29) for generating signals representative of the frequency and phase differences between the signals received at its inputs, and having an output connected to a voltage sensitive tuning component (24) associated with an oscillator (7) in the signal processing unit (2A) connected to said stabilizer (9) for generating said synchronizing signals of said one signal processing unit (2A).