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Measurements >> Phase Noise and Jitter Measurements >> Agi1ent E-444OA Phase Noise Measurement
https://designers-guide.org/forum/YaBB.pl?num=1378329974

Message started by neoflash on Sep 4^th, 2013, 2:26pm

Title: Agi1ent E-444OA Phase Noise Measurement
Post by neoflash on Sep 4^th, 2013, 2:26pm

Hi guys,

I plug a 200MHz clock into Agi1ent E-444OA and do phase noise measurement. This machine is a spectrum analyzer and capabable of doing phase noise measurement.

I adjust the integration rande to be from 100Hz to 100MHz in phase noise domain. The integral timing jitter is ~3ps-rms. However, when I plug this clock into a real-time scope, the rms jitter is smaller and close to 1.5ps-rms.

This lead me to wonder which readout is real. I'm looking forward to hearing your thoughtful inputs.

Regards,
Neo