[time-nuts] Best choice for house 10MHz reference...??
James R. Gorr
n3toy at yahoo.com
Tue Jan 29 10:58:04 EST 2008
What are you asking for a Thunderbolt?
--- George <n4ua.va at gmail.com> wrote:
> John Miles wrote:
> > As unhappy as you may be to hear it, Mike, you're
> done upgrading, at least
> > for now. Thunderbolts are about as good as they
> get. Yes, some units like
> > the HP and Jackson Labs clocks can do somewhat
> better, and with
> > entirely-different equipment, you might be able to
> tell. Not with the 49xP
> > analyzer, though.
> > Your 497P is limited by its 1-Hz counter LSD, not
> the Thunderbolt. 1E-10
> > accuracy from the Thunderbolt is 1 Hz at 10 GHz,
> and that's about what the
> > Thunderbolt does at tau=1s, even though the spec
> sheet shows it closer to
> > 1E-9 at t=1s.
> > That means that there is no conceivable benefit to
> further upgrading the 10
> > MHz reference beyond where you already are. I
> know, I know, that's the
> > worst news of all. :)
> > Focus on giving the Thunderbolt the best signal
> you can, via antenna
> > mounting.
> > -- john, KE5FX
> And, if anyone out there still need a Thunderbolt
> (for less than the
> ebay price), I have a few more OEM units available.
> geo - n4ua
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