SECAM Subcarrier generator

Details SECAM Subcarrier generator SECAM Subcarrier generator

1977-03-23

1978-04-11

Martin, John C.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 940

Patent

active

040841774

ABSTRACT:
A reference signal generator is provided for generating the two subcarrier reference frequencies for the SECAM television system. A master oscillator generates the first subcarrier reference frequency which is coupled to a divider for obtaining the horizontal line rate. The horizontal line rate is multiplied and coupled to a mixer, where it is mixed with the first subcarrier to obtain sum and difference frequencies. A crystal filter coupled to the mixer extracts the second subcarrier, which is locked in frequency and phase relationship to the first subcarrier. The signal generator also contains provisions for synchronizing the subcarriers to an external horizontal system reference.

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