> Using DATA A is the same as using USB *except* compression is set to
> zero and TX EQ is set to flat automatically.

*AND* RX EQ is set to flat - again to minimize distortion on RECEIVE.

73,

   ... Joe, W4TV


On 9/12/2017 9:15 PM, Don Wilhelm wrote:
Tom,

Using DATA A is the same as using USB *except* compression is set to zero and TX EQ is set to flat automatically.

So yes, USB may work OK, but you have a lot more flexibility with other modes when using DATA A.

That allows you to set whatever you want for SSB and not have to change it when you want to operate digital - which should not use compression nor equalization to minimize distortion in the transmitted signal.

73,
Don W3FPR

On 9/12/2017 8:58 PM, Tommy wrote:
   Don,

     Why DATA A mode and not USB? I've been doing FT8 using USB and it works fine. It seems.

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