I'm seeing +20-30 dBc/Hz of excess AM/PN, as well as a strong 1.5 Hz spur created by frequency doubling from 5 MHz to 10 MHz. https://goo.gl/photos/GFx9tQoxrSmyzUQo8 The input amplitude to the doubler should be just above the recommended 11 dBm. What's going on?? thanks! Anders