[A-DX] VOA Radiogram, 6-7 February 2016: MFSK32----- MFSK31

[Roger]

http://voaradiogram.net/post/138748787937/voa-radiogram-6-7-february-2016-mfsk32-1


".....VOA Radiogram, 6-7 February 2016:      MFSK32 - 1 = MFSK31...."   
( ? )
==================================================================================

Hm,   MFSK32 =  MFSK31 x 2 ;-)

http://www.rhci-online.net/radiogram/VoA_Radiogram_2016-02-06.htm#MFSK-31-32


The second image is an animation with 11 MB, ahem ...

As can be seen, the two modes have the same basic structure, the same 
track pattern.
In MFSK32 the number of tracks is doubled, thereby twice the bandwidth 
and information content.
However, thus less tracks get more audio level.
One might think that this improves the SNR.
It may be that in bad conditions the "half signal" has more audio level 
and MFSK-31 so a slight advantage.


roger