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Subject: Re: Constant Frequency at LOW temperature
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Date: Sun, 03 Nov 2002 10:32:50 GMT
NNTP-Posting-Date: Sun, 03 Nov 2002 03:32:50 MST
Feq. isn't pinned down yet since my client hasn't told me yet what the gear
ratios are that they are building. However, the application will use a
stepper. As far as accuracy, basically it will have to be able to keep up
with the sky (telescope tracking).
"Bill Sloman" wrote in message
> "Arch-lab" wrote in message
> > Hi
> > I haven't worked on this type yet... I need to create a nice stable
> > frequency for a stepper... problem is that it will need to have the same
> > frequency at -30 degrees C.
> > What technology / theory should I be looking up for this design.
> TCXO - a temperature controlled crystal oscillator. You stck the crystal
> a little oven and use a thermostat to make sure that the cyrstal and the
> inside of the oven sit at about 50C or 70C.
> The parts are commercially available.
> Of course, you first have to work out what you mean by a "nice stable
> frequency". For some applications, you might need an atomic clock as used
> (and available from) the Global Positioning System.
> Give us some numbers, or a description of your application, and we might
> able to be more helpful.
> Bill Sloman, Nijmegen
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