[time-nuts] need recomendation for a portable 10mhz reference oscilator

Magnus Danielson magnus at rubidium.dyndns.org
Tue Dec 11 20:52:55 UTC 2007


From: "Eric Fort" <eric.fort at gmail.com>
Subject: [time-nuts] need recomendation for a portable 10mhz reference oscilator
Date: Tue, 11 Dec 2007 11:38:40 -0800
Message-ID: <2ad2af430712111138q23eb4dfm76d9a138d76365fc at mail.gmail.com>

Eric,

> I'm looking for a fairly basic, relatively simple 10 Mhz PORTABLE
> reference (probably quartz based) with enough stability over a period
> of a week of outdoor temp extremes to keep a 47Ghz transmitter locked
> within 100hz  while mountaintop contesting.  Suggestions are
> appreciated.  something that is small and ran off 12 volts dc (car
> battery) would be a definite plus. 

Have a look at the Oscilloquartz 8711/8712 (G option, you would need
< 3E-10/day, so 2E-10/day fits your needs, but maybe you can live with the
164,5 Hz the standard 5E-10/day would give you) for instance.
Hook up a DAC and a small PIC or AVR to keep the DAC easilly controlable when
calibrating the frequency in the home lab.

There are many similar oscillators which will do the same trick. A 10811 would
also do the same thing, but it requires a higher voltage but a switcher would
double up the 12V.

Cheers,
Magnus




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