On 23/07/2021 08:30, time-nuts-requ...@lists.febo.com wrote:
If you manually set the DAC with the commands LH nicely provides
(LH is the*best* thing about these TBolts !!!) you will find it runs from
-5 to +5V. The OCXO should tune linearly over that range ( all of mine
do).
If you take a saw to the typical TBolt OCXO, you likely will find
a 10 MHz SC cut crystal in a single oven. The design changed over
the many years they were supplied. One date coded 1997 is not going
to be the same as one date coded 2005.
On any OCXO, to see if it’s using a doubler, just hook up a spectrum
analyzer to the OCXO output. You*will* see the sub-harmonic. Much
quicker / easier than tearing the thing to pieces.
Bob
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Thanks Bob, that is all I needed to know. +-5V for the DAC's output
ability, so close to zero is far from being an issue.
I have no plans to examine the internals of the OCXO, so will take your
word on that aspect!
Thanks for the time for your reply.
73.
Dave G8KBV
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