A Method of Band-Pass Amplifier Alignment
Julius J. Hupert, A. Reslock · Proceedings of the IRE · 1953
A method of alignment of band-pass amplifiers is discussed based on the oscilloscopic display of second order harmonic distortion as a function of the carrier frequency departure from the pass-band center. This method of alignment is thought particularly effective for band-pass amplifiers requiring high degree of linearity of transfer phase versus frequency function, such as for example, low-distortion FM intermediate frequency amplifiers.