[600MRG] WSQ2 initial impressions

[Ralph Wallio, W0RPK]

Thanks Jay ---

My experience last eveninghere in eastern NC FM15io, albeit very 
short,was more encouraging:


de ... WE2XGR/2 testing WSQ2 mode ... WE2XGR/2 testing WSQ2 mode ... 
WE2XGR/2 testing WSQ2 mode ... WE2XGR/2 testing WSQ2 mode ... WE2XGR/2 
testing WSQ2 mode ... WE2XGR/2 testing WSQ2 mode ... WE2XGR/2 testing 
WSQ2 mode ... WE2XGR/2 testiza vmodeo= 32F and ic d hw
btu
chZde wg2xh   %ht(cwurr = abt 65% cpi = snr mostly below -25 = hr 10F 
= tu qso = 73 73 = wg2xiq de wg2xjm sk   i
qry4zpzbjon
ezsbxrrr rrr rrr 73 73 73 73 wg2xjm de wg2xiq skoouuku
^s5


Your WE2XGR/2 sky-wave signal here is always strong so error-free WSQ2 
is as expected (many more error-free beacon sequences were received over 
our 778km path).

Note the WG2XJM<>WG2XIQ QSO text from WG2XIQ, "rrr rrr rrr 73 73 73 73 
wg2xjm de wg2xiq sk", received here over our 1837km path as extracted 
from garble before and after.  During this transmission, WG2XIQ's SNR 
was bouncing in a narrow range around the -25dB WSQ2 red line.

Assuming a close equivalence between WSQ2 and WSPR SNR readings, this is 
substantially better performance than we expect from PSK31 which 
requires -11dBsnr.

TNX es 73 de Ralph Wallio, W0RPK
http://showcase.netins.net/web/wallio/





On 2/12/2014 10:32 AM, jrusgrove at comcast.net wrote:
> These are just first impressions and may change with further testing.
>
> Had a QSO with John WE2XGR/3 last night and was able to switch between 
> different receive antennas and directions to vary his signal strength. 
> For LF and MF software we usually look at 'static resistance' and 
> 'fade recovery' as the two main criteria. There were small amounts of 
> static last night and large amounts of fading on John's signal. He is, 
> after all, the self proclaimed 'King of Fades' on 600 meters (with his 
> loop antenna).
>
> There were times that John's signal remained above -20 dB but copy was 
> rather spotty. This may have been exacerbated by the up and down of 
> John's signal but I would have expected at that signal level to have 
> solid copy. John's signal was audible at that point and we could have 
> easily carried on a 20+ wpm cw QSO even though the dips. Fade recovery 
> at low signal level 'troughs' may be the issue. Switching to a higher 
> signal level antenna got the decoder back on track in short order. 
> Still, with the 'troughs' not dipping below -20 dB and the signal 
> still barely audible in the 'trough' I would have expected better 
> copy. Dips below -25 dB caused the decoder to recover very slowly.
>
> Due to low static conditions no determination of 'static resistance' 
> could be made.
>
> There were several instances of short term continuous vertical lines 
> (intermittant interference) in the passband, and even though the lines 
> were equal to or weaker than than the desired signal they noticeably 
> hampered reception.
>
> At this point I would put it about on par with PSK31. Again, these are 
> just first impressions and may change with further testing. Comments 
> from others using the software is appreciated.
>
> Jay W1VD  WD2XNS  WE2XGR/2  WG2XRS/2
>
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