I am using EV-ADF411XSD1Z to test ADF4112. I use the onboard frequency reference(10MHz). When I check the R counter output at MUXOUT port. The signal is some spike waves instead of square wave(like the figue attached). And so as the N counter output. This makes my charge pump output pulse have very small interval. And the width-modulation almost doesn't have any effect. So after the loop filter the voltage is always high. Can anybody help me? I have been working on this project for several weeks... Thank you so much.