[A-DX] Reception VOA Radiogram 182 - 17580 kHz (17579, 8 kHz - LSB)

[Roger]

Am 24.09.2016 um 21:08 schrieb Frank Kreuzinger:
> Hello Kim, hallo Roger,
> very good reception conditions today. Modulation started 16:01:35 UTC.
> This time it is still mystery, why RSID is jumping about 360 Hz down 
> (see attached pdf-file). There are two further tracks visible in 
> sonogram.
> Kind regards
> Frank 

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The two "ghost tracks" are about 18 dB below the useful signal.  Are 
there problems in the modulator or  is the characteristic of a tube not 
correct?
What caused the offset of +/- 360 Hz?

But the noise margin concerning the own "homemade Greenville- QRM" is 
sufficient enough for good MFSK32 decoding .....


http://www.rhci-online.net/radiogram/VoA_Radiogram_2016-09-24.htm#VOA



roger