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From: "Bill Sloman"
Subject: Re: Constant Frequency at LOW temperature
Date: Sun, 3 Nov 2002 22:34:21 +0100
Organization: Planet Internet
NNTP-Posting-Date: 3 Nov 2002 22:34:14 GMT
X-Newsreader: Microsoft Outlook Express 6.00.2800.1106
"Tom Bruhns" wrote in message
> "Bill Sloman" wrote in message
> > "Arch-lab" wrote in message
> > 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.
> I know Bill well enough to believe this was a slip of the fingers on
> the keyboard...what he describes is an OCXO: oven controlled crystal
> (xtal) oscillator. TCXO (temp. compensated, not controlled) has parts
> which compensate the known temperature drift of the oscillator
> circuit; some these days do it digitally. An advantage of a TCXO over
> an OCXO is that it generally takes less power; the oven, especially
> when ambient is very cold, takes power. Another advantage is that the
> TCXO turns on quickly, while the OCXO takes some time to stabilize,
> again more so at cold ambient. At least, those (TCXO; OCXO) are the
> common terminologies you'll find in crystal vendors' literature.
Thanks Tom - my crystal vendor's books were all at work, and the slip was a
failure of memory. Apologies to all.
Bill Sloman, Nijmegen
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