Hi Said, We have a lot of fet probes in our lab, including Tek, hp and Philips. Only one is useful for jitter measurements with the Wavcrest, the hp 200MHz differential probe. I use it most of the time single ended. It is the noise bandwidth of the probe that is of most importance. If realy a fet probe is needed, than use a lowpass filter with enough bandwidth after the probe. Most of the time the majority of the jitter is still seen and the large noise bandwidth of the probe is attenuated.
Henk On Jun 14, 2007, at 19:34, [EMAIL PROTECTED] wrote: > > I have the 2G, 4G, and the 8Gs/s plug-ins, and use the 54701A > probes, but I > only get down to about 60ps jitter even after calibrating the > mainframe and > plug-ins. > > I typically measure single-ended outputs, but could also measure > the FireFox > Signal Generator differential LVDS outputs. Is measuring > differentially the > trick? Or not using the FET probes? _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts