[time-nuts] Ebay FE-5680A Rb

Steve . iteration69 at gmail.com
Wed Dec 14 20:20:30 EST 2011


Looks to me like 63.8976mhz (63,897,600hz) is divisible by two. Using a
counter to make a clock distribution system etc. With that in mind i could
use this in all sorts of projects.


Steve
On Wed, Dec 14, 2011 at 7:02 PM, Pete Lancashire <pete at petelancashire.com>wrote:

> I use to have a reference to frequencies used by the different cell
> systems. That's my
> call .. and I can't think of another industry that just like the
> Thunderbolts that when it
> does a refresh or a fix from a design oh-shit dumps so many of the same
> thing.
>
> I just read US Patent 6,282,184 "Common Digitizing Rate for Multiple
> Air Interfaces
> for Generic Cell Sites in Cellular Radio" .. it mentions it.as a base
> frequency (11.37)
>
> -pete
>
> On Wed, Dec 14, 2011 at 2:44 PM, Azelio Boriani
> <azelio.boriani at screen.it> wrote:
> > The 63.8976MHz frequency seems to be related to the OFDM frame of the
> WiMAX
> > standard that has a window of 62400 bytes and the 63.8976MHz can time
> WiMAX
> > BaseStations with only powers-of-2 dividers.
> >
> > On Wed, Dec 14, 2011 at 11:24 PM, paul swed <paulswedb at gmail.com> wrote:
> >
> >> Could be but as a timenut not real magical to me either.
> >> Regards
> >> Paul
> >>
> >> On Wed, Dec 14, 2011 at 5:06 PM, Javier Herrero <jherrero at hvsistemas.es
> >> >wrote:
> >>
> >> > I'm begin getting curious... having already received that OCXO, and
> with
> >> a
> >> > 2nd unit arriving... I've googled the frequency and there are about a
> >> > zillion cristals and oscillators for that frequency from a ton of
> >> different
> >> > manufacturers, and seems that the frequency is patented: US patent
> >> 6282184
> >> > (well, I suppose that not exactly the frequency is what it is
> patented,
> >> > but...):
> >> >
> >> > " The digitizing rate of the A-D converter 41 preferably set for this
> >> > example to 63.8976 MHz is carefully selected, as described in detail
> >> below,
> >> > to eliminate the need for additional expensive and complex signal
> >> filtering
> >> > and shielding that would otherwise be required in the RX channelizer
> >> banks
> >> > 7, 8, 9 for simultaneously processing the digitized signal received by
> >> the
> >> > A-D converter 41 at the common digitizing rate based on their
> respective
> >> > CDMA, TDMA and GSM requirements "
> >> >
> >> > So... this seems to be the magic about this frequency (and the reason
> >> that
> >> > these sellers has enough of them for sameless give them away)
> >> >
> >> > Regards,
> >> >
> >> > Javier
> >> >
> >> >
> >> > El 14/12/2011 22:41, Pete Lancashire escribió:
> >> >
> >> >> I'd agree. If you google the frequency there is a lot of surplus out
> >> >> there and unless
> >> >> you building your own cell system I can't think of any use .. yet :-)
> >> >>
> >> >> On Wed, Dec 14, 2011 at 11:53 AM, Chuck Harris<cfharris at erols.com>
> >> >>  wrote:
> >> >>
> >> >>> I would say that he has a gadzillion of the OCXO's, recognizes that
> the
> >> >>> frequency
> >> >>> is useless, and would rather give them away, generating a little
> >> >>> synthetic
> >> >>> good will,
> >> >>> than scrap them.
> >> >>>
> >> >>> -Chuck Harris
> >> >>>
> >> >>>
> >> >>> Joe Leikhim wrote:
> >> >>>
> >> >>>>
> >> >>>> I have been watching this thread and may have missed something. My
> >> >>>> questions: What is
> >> >>>> the purpose of the outboard OCXO VECTRON 63.8976Mhz? What model
> number
> >> >>>> does this RB
> >> >>>> most closely resemble?
> >> >>>>
> >> >>>>
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