Hi Brian, I think your summary is correct. I have a couple of 8600's here (from eBay some years ago) and they do as well as a cherry-picked 10811A. There are several versions in the 8600 family, though, so you have to be careful about the specs. The best BVA as far as I know is the model 8607 and the very best of those are called option 08. You can see the performance of a OSA 8607 /08 here:
http://www.leapsecond.com/museum/osa8607/ I'll see if I can dig up measurements I made of a regular 8600 and post them for the group. /tvb ----- Original Message ----- From: <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Wednesday, March 15, 2006 10:42 Subject: Re: [time-nuts] OSA 8600 Oscillators > From what I have read, BVA technology is about as good as it gets for the best close-in phase noise in a quartz crystal. It was once desribed to me as having the lowest "quartz-to-crud-ratio" since the elctrodes are not plated on to the quartz. A limiting factor can be that less RF power can be coupled through the crystal due to the series capacitance effect of the spaced elctordes. Close-in noise is great but far-out noise could be poorer than typical SC-cut plated xtal due to S/N effects with a lower xtal drive power. > > Maybe someone here on this list with more first hand experience can give us more details about the subject. > > -Brian, WA1ZMS _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
