Tom Van Baak said the following on 05/30/2009 03:44 PM:
... as long as you remember to use TI+/- mode.
For stuff like this I use plain old TI mode and just set the
UUT 1pps to lag the reference 1pps by a fraction of a
second, or maybe even just a couple of microseconds.
That way you get a sma
In message <81fa4fd1186b4407be773c83adf59...@pc52>, "Tom Van Baak" writes:
>> ... as long as you remember to use TI+/- mode.
>
>For stuff like this I use plain old TI mode and just set the
>UUT 1pps to lag the reference 1pps by a fraction of a
>second, or maybe even just a couple of microseconds.
1) are you comparing two relatively stable 1pps sources, or
If (1), then any time interval counter will work for you. There
is no issue of "dead time" or "continuous" measurement. You
can calculate ADEV directly from the raw output of the 5370,
because it is giving you a periodic series of time i
In message <7487a8e5980845359b6047d0e84c6...@pc52>, "Tom Van Baak" writes:
>1) are you comparing two relatively stable 1pps sources, or
>
>If (1), then any time interval counter will work for you. There
>is no issue of "dead time" or "continuous" measurement. You
>can calculate ADEV directly from
I'm not sure it's possible to make continuous stability measurements (Allan
deviation, etc.) directly with a 5370 since they don't support
running/overlapped measurements between readings.
John,
It depends on what you mean by "readings". Or on what the
two sources are:
1) are you comparing two
Yes.. I ran across these references also. Thanks
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> I have done picket-fencing for years on my 5370B and never seen this
> problem.
>
> I usually use a 1Hz signal as start and a 10MHz from my house reference
> as the stop.
That seems to work OK on this counter, now that you mention it, except that
I see wraparound from 105 ns to 6 ns rather than
In message , "John Miles" writes:
>2) Something peculiar that my 5370B does: when the A-B time interval is
>about 60 milliseconds either side of coincidence, the counter fails to
>report a measurement at every other second. E.g.:
I have done picket-fencing for years on my 5370B and never seen th
Further to this:
> I'm not sure it's possible to make continuous stability
> measurements (Allan
> deviation, etc.) directly with a 5370 since they don't support
> running/overlapped measurements between readings. If you can work with a
> 1-pps output and can provide a divider for your reference,
I have run an Austron 2100 for a long time with a home-made antenna
consisting of a short (15') vertical wire with an active impedence
transformer at the base. It is just a FET source follower where the wire
drives the base and the source drives the coax to the receiver. Power is
fed up the
Does anyone remember much about the old Motorola Oncore UT GPS receivers?
I have an HP Z3816a GPS timing receiver. I've been meaning for a long
time to add a display for UTC time to it for a while. Today I finally
got that project built and installed, and it works as intended, but I'm
seeing s
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