Re: LF: More EbNaut 137.777

[Markus Vester <markusvester@aol.com>]

 
First three decodes tonight:

 

   2015 Nov 27/28

start  Eb/N0  time offset
 UT      dB    seconds

2030     2.2     1.2
2100    -0.9     1.2  (after notching QRM)
2130     5.7     1.0

 

The delay seems to be constant now.

The 21:00 sequence was first not decoded, obviously due to QRM from a lonely QRSS "GH" from UT7GH, only 0.02 Hz below the center frequency of your invisible signal. I then used a text editor to "notch" the QRM by clearing some strong bins in the exported FFT data. After rerunning ifft and ebnaut-rx, I was rewarded by a valid -0.9 dB decode.

 

Best 73,

Markus

 

-----Ursprüngliche Mitteilung----- 
Von: jcraig <jcraig@mun.ca>
An: rsgb_lf_group <rsgb_lf_group@blacksheep.org>
Verschickt: Fr, 27 Nov 2015 8:57 pm
Betreff: Re: LF: More EbNaut 137.777

Hi Markus, 

 

My aerial current is 170mA so 3.5 uW on 8.3 kHz! 

 

Nice Eb/No values, Markus.  Getting ready to start EbNaut again, hopefully 

with the timing offset reduced.  Intended start time 2000 UTC.  

CHU weak on 7850 kHz -- hopefully reflex time is good. 

 

73  

Joe VO1NA