[GreenKeys] oddball mark space frequencies

[Rokumon Cat]

Hi,
 
I was wondering what use would an audio pair of 2337.5/mark and 2252.5/space would be for AFSK?
 
I found on the e-place a tone unit with this pair for my northern radio AFSK generator.
 
I know that the recommended amateur frequencies are 2125/mark and 2275/space.
 
Thanks once again!
 
Joe
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