Thank you very much for your response and detailed links. It's quite useful when designing loop filter for FMCW signals.
There appears to be a problem with EngineerZone displaying videos. I have reported this to our developers.
In the meantime, access the video here: http://videos.analog.com/video/products/rf-ics/1846356091001/Using-ADIsimPLL-to-Simulate-Frequency-Ramps-on-the-ADF4158/
Where's the video showing the simulation process of frequency ramps?