Hi Corby,
This is where the phase-noise properties becomes relevant, as the phase
noise at 137 Hz and 274 Hz will be relevant as it will add to the noise
of the physical package to be down-converted by the synchronous
detection as it goes into the loop, and through that affect the
stability for lo
Magnus and Tom,
Thanks.
I'm not (and don't want to be!) a phase noise nut!
However I am an Allan Deviation nut and have documented many 5065A with
the 10811 retrofit that drop into the -14ths between 64 and 128 Sec and
the best show 4.5X10-14th at 1000 Sec.
So I'd say the original circuit does
Full thread in the archives:
http://lists.febo.com/pipermail/time-nuts_lists.febo.com/2020-January/098855.html
http://lists.febo.com/pipermail/time-nuts_lists.febo.com/2020-January/thread.html
/tvb
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Hi Corby,
On 2020-07-20 19:55, cdel...@juno.com wrote:
> Magnus, You mentioned:
>
> "The produced noise is at least 10 dB worse than you
> would expect. This impacts long term stability response as I have
> reported earlier."
>
> Can you refer me to the info you posted earlier or elaborate?
I po
Hi,
decided to follow up with a little sanity check: I pitted my DiY attempt
against a "commercial" GPSDO, a Trimble branded UCCM, sourced from Ebay. Of
course I have no idea whether the Trimble still meets specs, or what these
specs even are, but I think all in all I'm doing not so badly with
Magnus, You mentioned:
"The produced noise is at least 10 dB worse than you
would expect. This impacts long term stability response as I have
reported earlier."
Can you refer me to the info you posted earlier or elaborate?
Thanks,
Corby
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time-nuts
I haven't been following all the posts on this topic
and apologize if repeating someone else's observations.
There are dip versions of the 74ACT160N that will do 100MHz over
temperature depending on the manufacturer. The MC74act160N is a
dip part available from Ebay at 10 for $10.00. The package
