That's another reason you want to use a Tek 600 series (or other) display for X-Y work. The axes are identical and the Z axis has high BW.
-John =========== > One issue with X-Y mode on analog scopes is the different bandwidth of the > two signal paths. Do not expect to have amplitude or phase fidelity within > the vertical bandwidth. 1/10th of it is probably the best you can hope > for. > > In that regard, DSOs with all their quirks are more symmetrical since > those I have seen do this actually use the two vertical channels, so the > bandwidth is matched. > > Didier KO4BB > > Sent from my BlackBerry Wireless thingy while I do other things... > > -----Original Message----- > From: "Marvin E. Gozum" <[email protected]> > Sender: [email protected] > Date: Wed, 18 Apr 2012 07:29:00 > To: <[email protected]>; <[email protected]> > Reply-To: Discussion of precise time and frequency measurement > <[email protected]> > Subject: [time-nuts] Chinese Scopes > > XY quality: > > Many DSO have had slow wfms/sec or update rates. > Its a reason Agilent touts its new fast rates in their new scopes. > Here's a test XY mode "youscope" test app on an analog, Agilent > Infiniivison and Rigol 1052e for comparison: > > http://www.youtube.com/watch?v=OxlCoKN4W7c > > > Mpts on timebase: > More memory is always good but it may not be so on low end scopes as > it eats refresh rates. > > used Tek scope: > Old scopes are always a gamble, some odds are worse than others. If > you can risk worse case and have to repair it, and can do so, have > the space for it, it likely will do better than any low end Chinese scope. > > In the end, I think the Chinese label scopes raise the bar on new > entry level DSO, opposed to the existing leaders. But one can't > expect too much from them. Only Rigol provides 1 GHz bandwidth to > date, just at the low end of the top tier models by Agilent, LeCroy and > Tek. > > Will they catch up soon? Dunno, I presume manufacturers have wised > up on IP theft, and won't be giving it away as in past 20 years, to > Chinese industry. > > > http://readingjimwilliams.blogspot.com/ > > > >>At 01:51 PM 4/16/2012, [email protected] wrote: >> >> >There is a rumor that one also needs an analog scope. >> >>Where analog scopes generally win is in X-Y mode, most digitals I've >>seen suck at that. >> >> >>At 06:44 PM 4/16/2012, [email protected] wrote: >>> >>>OK. IMO, there is another, perhas a more important, issue.... memory >>> depth. >> > To bring this full circle, a friend bought a very clean, working 465 for > $50 at MIT. > > > > > _______________________________________________ > 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. > _______________________________________________ > 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. > > _______________________________________________ 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.
