[RTTY] RTTY Newbie Questions

Frank frankkamp at att.net
Tue Jan 8 14:11:36 EST 2013


Al Kozakiewicz wrote:

>It was meant to be provocative.  Every complaint I've "seen"  of splatter with a modern DSP generated FSK signals has been due to the complainers receiver, often an artifact of the same high end DSP design that generated the signal!
>
>The IC-756 Pro III, for just one example, will make it appear that strong signals have splatter 2 kHz away when using a narrow filter. Broaden out the filter and the "splatter" disappears!
>  
>
Yup, happens with DSP decoded and generated PSK signals too.  You can 
fill the whole spectrum with trash by mearly overdriving the sound card 
input.  Then try make friends by informing everyone that their 
transmitted signals are plaugued by the IMD that is being caused locally 
by your sound card being overdriven.


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