[time-nuts] Efratom MFS system

John Ackermann N8UR jra at febo.com
Sun Nov 25 20:51:31 UTC 2012


Thanks, Ed.  I wasn't aware of the MFTS.  I'll look up those docs.

John
----

Ed Palmer said the following on 11/25/2012 12:12 PM:
> Did you see that Symmetricom has the MFTS (Modular Frequency Timing
> System) which is described as the replacement for the MFS.  The manual
> includes a warning not to interchange the modules between the two
> systems.  There may be some value in reviewing the MFTS manual to see if
> there's anything applicable to the MFS.
>
> Ed
>
> On 11/25/2012 10:15 AM, John Ackermann N8UR wrote:
>> At a recent hamfest, I picked up an interesting looking Efratom "Made
>> in Germany" MFS modular frequency standard system.  It's basically a
>> GPS disciplined FRK Rubidium with XO fail-over and a whole bunch of RF
>> and PPS outputs, in a *very* heavy box.
>>
>> I've had a chance to play with it a bit and take some measurements,
>> and was able to find some (but not a lot) of documentation on the
>> web.  I've put it all at
>> http://www.febo.com/pages/efratom_mfs/index.html for your viewing
>> pleasure.
>>
>> One thing I'd like to learn more about is how the "MDC" fail-over
>> controller works, and also how to adjust the MXO backup crystal
>> oscillator -- the "Adjust XTAL" indicator on mine is on the edge of
>> being lit, but I haven't been able to find any way to trim the OCXO.
>> The GPSDRb is working just fine, though.
>>
>> John
>
>
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