[time-nuts] Re: Spectracom 9383 w/OXCO

Erik Oehler erik.oehler at gmail.com
Thu Jun 30 15:58:02 UTC 2022 

Sam is correct! I work for Orolia (formerly Spectracom) and asked our
support team about this issue. Keith from the team got back to me with the
below explanation:

I know “all too well” what this “commonly inquired about” NetClock 9383 log
entry means (☹)!   It means the NetClock is operating normally (😊)!!  It
was often misconstrued as an issue, but the “wording” of this expected
entry is a “hard-coded” value which stands for “fractional frequency error”.




All oscillators inherently have “error”.   This particular entry in the osc
log is just reporting what amount of error there was, at that time.  It’s
the values reported at the end of this, and not the wording of the entry
itself, that determines if there is an issue.

On Tue, Jun 28, 2022 at 11:22 PM Sam Bach via time-nuts <
time-nuts at lists.febo.com> wrote:

> Yay, a question I can actually answer!  I also have one of these, though
> mine has the TCXO option.  The FREQ ERROR is a measure of the output
> frequency deviation from the reference, if I understand correctly.  It
> doesn't indicate a fault with the unit, and is, like you figured, an
> informational message indicating the status of the disciplining circuitry
> for the oscillator.
>
> Sam
>
> On Tue, Jun 28, 2022 at 4:08 PM timenuts--- via time-nuts <
> time-nuts at lists.febo.com> wrote:
>
> > Hi,
> >
> >
> >
> > Last year I acquired one of these from ebay – and it seems to be working
> > fine.
> >
> >
> >
> > Having found this list while searching for something other – I thought
> > this might be the place to ask 😉
> >
> >
> >
> > The oscillator log on the Spectracom shows this (and always have while in
> > my possesion):
> >
> >
> >
> > Jun 28 16:18:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:19:50 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:21:30 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:23:10 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:24:50 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:26:30 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:28:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:29:50 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:31:30 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 16:33:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:34:50 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:36:30 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:38:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:39:50 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 16:41:30 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:43:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:43:11 chronos spectracom: [system] AUTOMATIC D/A ADJUSTMENT.
> > D/A= B08E MATCH CNT= 2755
> > Jun 28 16:44:50 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:46:30 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:48:10 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:49:50 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 16:51:30 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:53:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:54:50 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:56:30 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 16:58:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 16:59:50 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 17:01:30 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:03:10 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 17:04:50 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:06:30 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 17:08:10 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:09:50 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 17:11:30 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:13:10 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:14:50 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:16:30 chronos spectracom: [system] FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:18:10 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> > Jun 28 17:19:50 chronos spectracom: [system] FREQ ERROR= 3.33E-10 FREQ
> > CNT= 1,000,000,000
> > Jun 28 17:21:30 chronos spectracom: [system] FREQ ERROR= -3.33E-10 FREQ
> > CNT= 999,999,999
> >
> > I don’t like the FREQ ERROR part – but seeing FREQ ERROR= 0.00E+00 FREQ
> > CNT= 1,000,000,000 makes me believe it’s just rather informational?
> >
> > Or is this a case for concern?
> >
> >
> >
> > Kim Sindalsen
> >
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