[time-nuts] another Ebay mixup, 5370

Henk ten Pierick henk at deriesp.demon.nl
Thu Jun 14 14:32:10 EDT 2007

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  
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  


On Jun 14, 2007, at 19:34, SAIDJACK at aol.com 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?

More information about the time-nuts mailing list