[time-nuts] Ebay FE-5680A Rb

Javier Herrero jherrero at hvsistemas.es
Wed Dec 14 17:06:49 EST 2011


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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