On 8/30/12 6:29 PM, Magnus Danielson wrote:
On 08/31/2012 03:12 AM, Bob Camp wrote:
Hi
If the temperature is varying slowly *and* there are no gradients you
may get your order of magnitude over some range. You might be
surprised at your TCXO. A lot of them are pretty darn good in the
vicinity of room temp. You may already be an order of magnitude past
your ppm or two for fairly normal temperature changes.
I haven't seen that any of the TCXOs compensates for the temperature
hysteresis. It would be cool if they did.
That is the dominant error source for changes over the 5-40C.. about 0.2
ppm difference when going up from -55 to +85 and going down over the
same range.
The ability to handle temperature gradients can be troublesome for both
TCXOs and OCXOs.
TCXOs have become quite good these days.
Cheers,
Magnus
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