Measuring GHz phase noise using a dual-channel downconvert with the PN2060A phase noise analyser

 Measuring GHz phase noise using a dual-channel downconvert with the PN2060A phase noise analyser

https://ww1.microchip.com/downloads/en/Appnotes/AN3899-UHF-and-Microwave-Measurements-with-the-53100A-Phase-Noise-Analyzer-DS00003899A.pdf

Digital PLL Frequency Synthesizers: what they are, how they work  https://www.youtube.com/watch?v=5K7Pvc5fxZI

Dividing the reference oscillator reduces the frequency step size.

Dividing the output allows the phase comparison with the reference clock.