[RTTY] FW: OO Advisory kk5oq

[Joe Subich, W4TV]

> With DDS rigs like the FT-1000MP, you are at the mercy of the  
> manufacturer of the DDS chip, and can just hope that they'd slewed  
> between the mark and space tones in some nice fashion.  Since the  
> rigs also don't have a baud rate menu, I suspect they are slewing at  
> faster than what is optimal for 45 baud RTTY (since they also 
> have to work with 75 baud RTTY).  Just a guess on my part.

The FT-990, FT-1000D, FT-1000MP, mark V, Field, etc. are actually 
AFSK even in "FSK."  Yaesu generates FSK by feeding an audio 
tone into the balanced modulator.  The audio tone is generated 
in a phase continuous audio synthesizer. 

73, 

    ... Joe, W4TV