Hi
Depending on your definition of “accuracy”, and the actual device, the answer
is likely
in the 1 ppb to 10 ppt range based on a 10 second measurement.
What’s going on?
First up you have the basic accuracy of GPS. Over many days of averaging (with
a fairly
fancy averaging device) that can
Hi Donald --
Over a 10 second interval, you're really looking at the short term
stability of the oscillator in the GPSDO, which could vary be several
orders of magnitude. The GPS component will set the nominal frequency,
but the noise around nominal will be that of the OCXO.
A quite good
Not sure what you mean by "accuracy over a 10 sec interval". If you mean
(in)correctness of frequency averaged over a given 10 sec interval, it's
more
like a few parts in 10^9. But if you mean stability of frequency without
regard
for its correctness, you might see your 2 parts in 10^12 in at
Can any list member please tell me the "accuracy" that can be expected from
a typical GPSDO
over, say, a 10 second interval? I have several measuring instruments
connected to my Trimbal GPSDO, and would like to know what to expect. At
the moment I am guessing about 1 to 2 parts in 10^12.
A friend of mine sets watches this way, except that he slips the
watch into a coil connected to his HP-3586B SLM receiver. This seems
to work even with metal cased watches.
Burt, K6OQK
At 07:57 AM 9/9/2020, you wrote:
The 32768 Hz crystal oscillator can be received, amplified, and
filtered
The 32768 Hz crystal oscillator can be received, amplified, and filtered
outside the watch as described here:
http://charliethompson.50megs.com/quartz.html
I actually tried this once, and it worked quite well on every watch and clock I
could get my hands on at the time.
The first three
