Re: Over-Driven FT-8 QRM #FT8 QRM #FT8

Tony
 

Graham:

Single-tone modulation shouldn't produce inter-mod products, but some of the FT8 signals behave that way as if there were 2-tones in play. Could you elaborate on aggressive tone switching and it's effect?

Tony -K2MO


On 9/22/2019 12:15 PM, Graham wrote:
Its only  single tone , no  intermod  products , don't matter where the  alc is set,  that's  harmonics  , due to the  aggressive  tone switching ,  mfsk  produces a  similar set of sidebands ,  but not  as bad ,,  wspr2  makes the same , but the  rate is  slow, so no one notices ..interesting  arrl  have issued a statement  , stating its not  compatible  with there  data  award's ?

73-Graham
G0NBD


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