04-04-2014, 04:35 PM
Some distortion was designed into those old RF generators, in order to get harmonic output. Many radio manufacturers call for you to set a signal generator at a relatively low output frequency, and use harmonics of the output when moving from band to band doing an alignment. Also, that entire highest band is entirely harmonic output. IIRC, they use 3rd harmonic, as odd numbered harmonics are higher in energy than even.