Cross-modulation In HRC Systems (1981)
By G. G. Luettgenau, Trw Semiconductors
The nature and origin of AM and PM cross-modulation is discussed. A typical cascode amplifier is examined.
A 400 MHz CATV Hybrid is thoroughly characterized with respect to various forms of third-order distortion. It is shown that phase cross-modulation is a major factor at high frequencies.
Because of the pseudo-single-sideband nature of TV transmission, PM distortion becomes visible. Predictions for the shape and magnitude of visual manifestations are made. A practical experiment is described.
Cross-modulation in 52 channel HRC systems is investigated using a computer model. Significant improvements are predicted.
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