Re: LF: EbNaut test at 8270.00332 from JN64bw

[Paul Nicholson <vlf0403@abelian.org>]

Riccardo wrote:

> f = 8270.00332 Hz
> Start time: 20:00:00 UTC
> Symbol period: 60 s
> Characters: 2
> CRC bits: 10
> Coding 16K21A

Overnight 18th/19th successful decodes at Bielefeld, Cumiana,
and Todmorden.

Phase measurements are at 8270.0033187866 Hz instead of
8270.00332 Hz, a difference of 37.7 degrees per day.

Todmorden 1413km
----------------

 17/18th Eb/N0 +4.0 dB -31.5 dB in 1Hz, phase -117.5 deg *decoded*;
 18/19th Eb/N0 +6.0 dB -29.5 dB in 1Hz, phase   +8.7 deg *decoded*;

Bielefeld 845km
---------------

 17/18th Eb/N0 -3.1 dB, -38.6 dB in 1Hz, phase -27.7 deg;
 18/19th Eb/N0 +0.2 dB, -35.3 dV in 1Hz, phase 111.2 deg *decoded*;

Cumiana 371km
-------------

 17/18th Eb/N0 +1.1 dB, -34.4 dB in 1Hz, phase +139.2 deg *decoded*;
 18/19th Eb/N0 +0.9 dB, -34.6 dB in 1Hz, phase  -96.4 deg *decoded*;

Warsaw 1035km
-------------

 17/18th Eb/N0 -5.8 dB, -41.3 dB in 1Hz, phase -28.3 deg;
 18/19th Eb/N0 -3.1 dB, -38.6 dB in 1Hz, phase  88.7 deg;

Phase shift from 1st night to 2nd night agrees on all three
sites, so I guess something changed at the transmitter.

--
Paul Nicholson
--