Edgar wrote:

> why is a GPSDO better than using just a Rubidium
> Oscillator for EbNaut?

If you have a rubidium oscillator, then use it.  But if
buying, then I'd suggest a GPSDO because they're often
cheaper, you don't have to worry about calibration, and
it also gives you a PPS for your soundcard and the UT for
your PC.

VO1NA 2015-12-02/03 8K19A 1S 25C QRO

 start  Eb/N0  BER    rank

 21:00   11.5   4.6%  0
 21:30   14.9   0.6%  0
 22:00    2.5  27.4%  0
 22:30   10.8   5.8%  0
 23:00   15.4   0.4%  0
 23:30   13.2   2.0%  0
 00:00   12.1   3.5%  0
 00:30   14.2   1.0%  0
 01:00   13.1   2.1%  0
 01:30   14.4   0.9%  0
 02:00   14.3   1.0%  0
 02:30    4.5  22.5%  0
 03:00   15.6   0.3%  0
 03:30   12.8   2.5%  0
 04:00   12.4   3.1%  0
 04:30    6.3  17.7%  0
 05:00   13.7   1.5%  0
 05:30    5.5  19.9%  0
 06:30   11.4   4.8%  0
 07:00    9.2   9.7%  0
 07:30   10.9   5.8%  0
 08:00    8.1  12.6%  0

Only one missing, 06:00
--
Paul Nicholson
--