This oscillator has an 11.6MHz crystal and it is tuned for the 3rd overtone or harmonic of 34.8MHz. The sine wave below is quite good, and there is almost very little of your eleven.6MHz elementary inside the 34MHz output within the Fourier display. The definition with the startup time of https://beaudvqjc.collectblogs.com/76162828/detailed-notes-on-precision-crystal-oscillators