Hi Just to be very clear:
a spec guarantee of < 1.0 x 10^-13 at any tau between 1 second and 100 seconds is a very different thing than "generally below 1.0x10^-12 at 1 second". That said, not all BVA's meet that spec. Bob On Aug 30, 2013, at 11:52 AM, Said Jackson <[email protected]> wrote: > Steve, > > 10E-013 means 1E-012. But the BVAs run in the low xE-013, about 10x better > than that. And they are specifically designed to give great ADEV from at > least 1s to 30s and more. > > Agreed, its very easy to find fantastic phase noise performance from NEL, > Pascal, Wenzel and others. That (-180dBc noise floor etc) seems to be no big > deal these days, even though a very good Pascal ocxo will still cost as much > as four CSACs or more. > > Please give some examples of oscillators that were designed specifically for > ADEV performance and can be ordered with specific ADEV parameters or are > known to have these kinds of performance levels typically, I don't know of > many.. Maybe 1 out of 10 HP 10811 will have ADEV in the low xE-013 as far as > I have seen. Tom Van Back has a nice treatise on the ADEV of a large number > of 10811's he measured in his Z38xx gpsdos, only some are truly great. > > Thanks, > Said > > Sent From iPhone > > On Aug 30, 2013, at 8:21, "Martyn Smith" <[email protected]> wrote: > >> Hello, >> >> Today many manufacturers are producing 10 MHz oscillators that offer many >> advantages over BVA. >> >> Phase noise of < -116 dBc @ 1 Hz with a -175 dBc noise floor, ageing of 5 x >> 10E-9 per month and a G sensitivity of 5 x 10E-11 /g in all axis is >> available on a new product. >> >> Also the short term Allan variance is in the low parts in 10E-13 for one >> second. >> >> It seems to me the only real advantage of BVA is the long term ageing and >> this can easily be sorted out by locking to a superior standard. >> >> Best Regards >> >> Steve >> _______________________________________________ >> 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.
