On Wed, 14 Aug 2002 22:24:11 +0300, you wrote:

>On Wed, 14 Aug 2002, Mike Singer wrote:
>
>>Harold M Hallikainen wrote:
>>> Also, remember that setting a 12 MHz oscillator to
>>> within 1 Hz means it isn't going to stay there.
>>> That's 0.1 ppm. Really good crystal oscillators
>>> (with temperature compensation or ovens) can maybe
>>> do 1 ppm or so.
>>
>>Yes, from Electronicstalk.com:
>>
>>"The FTS501AH OCXO offers a frequency stability of
>>+/-250ppb over the standard temperature range of 0 to 70C"
>>
>>(ppb =3D 1000 ppm ?)
>
>Yes, billion =3D 1e9
>
>The only small problem is price. Fox TCXOs were around $40 when I last
>checked and the spec was worse than 0.25ppm.
Almost every cellphone contains a TXCO, therefore they must be
gettable for a lot less than $40.....

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