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

[Sam Bach]

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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