From: Dr Bruce Griffiths <[EMAIL PROTECTED]> Subject: Re: [time-nuts] Ultra low phase noise floor measurement system for RF devices. Date: Sun, 01 Apr 2007 13:49:03 +1200 Message-ID: <[EMAIL PROTECTED]>
> Magnus Hej Bruce, > Balanced low frequency signal transmission with shielded cables is > easier with XLR connectors, provided one uses 1 connector per channel. I'm a long time fan of XLRs from my audio-days. Neutrik is the favorite brand naturally. As long as one wire up properly (1 - GND, 2 - Hot/+, 3 - Cold/-) it is good. > Enrico's paper on the use of counters to measure frequency stability > > http://www.femto-st.fr/~rubiola/journal-articles/rubiola2005rsi-hi-res-freq-counters.pdf > > <http://www.femto-st.fr/%7Erubiola/journal-articles/rubiola2005rsi-hi-res-freq-counters.pdf> > > Shows why the SR620 is preferable to the Agilent 53332A/53331A I assumed you mean 53131A/53132A. > and the Pendulum counters for this application. Depends on the model. CNT-90 has a mode which is most suitable, time-stamping and everything. > Using the HP5370A/B or other time interval counters in the picket fence > mode is also OK. > > The cost of the SR620 highlights the need for a relatively inexpensive > reasonably high resolution timer counter or time stamp device for such > applications. I like properly time-stamping counters, such as my HP 5372A. I need to look at the details of the SR620, but as I recall things it should be able to pull about the same stunts. I haven't dwelved into the details of my SIA-3000P formats and how that would be useable, but it got a 200 fs singel shot resolution which is rather good. The software really helps alot when analyzing jitter. Cheers, Magnus _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
