Hi Demian, I can confirm that the Wavecrest achieves it's ~3ps noise floor (with some luck and getting one with a very good internal 100Mhz reference). For full calibration of the unit, one needs the VISI software and a GPIB connection. It does this by having an internal resolution of 800 femtoseconds, and by averaging (say 1000 to 3000 readings). It can do this very fast. On an 5370B I get 20ps rms with averaging only on a good day, and with lot's of tweaking of the front panel nobs.
BTW: the Wavecrest get's best results with very fast edges (such as from LVDS drivers). Sine Waves are worst. Bye, Said In a message dated 3/19/2010 21:03:36 Pacific Daylight Time, [email protected] writes: I have read through the data sheets on all of these and am very interested in the differences in reality. The Wavecrest claims 2 pS Jitter measurement. The HP has a single shot resolution of 20 pS, The SR620 is 25 pS and the Wavecrest specs say 20 pS. How does the Wavecrest get .1X minimum Jitter measurement of the others with the same resolution? Can that trick be applied to the others? Demian _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
