HP8720C PLL phase lock error and Power Supply Repair

This video is about HP8720C PLL phase lock error and Power Supply Repair

[@usuthu65]

Hats off to a stubborn, thorough debugging!

[@TheDefpom]

Power supply ripple can cause all kinds of odd issues, PLL’s are sensitive to it due to the phase detector and VCO loop.

[@ksbs2036]

Thanks for putting this together. Might I suggest you adopt the video techniques of Big Clive or EEVBLOG. I'm getting some motion sickness while watching the video so I went audio only 😎

[@guesswhotoo6]

Have similar issue on an 8753ES

[@roque3584]

Could you please tell me the web site that has the schematics ?

[@GregoryCharvat]

ftb.ko4bb.com/getsimple/index.php?id=manuals&dir=HP_Agilent/HP_8753_Network_Analyzer