[Elecraft] Transmit Equalizers and FT4/8

[Bob McGraw K4TAX]

Equalizers introduce phase shift.  Even the very best ones do that.   
Thus for a phase shift audio signal, either transmitted or received, use 
of any EQ can and will introduce phase shift in the audio path.   It is 
not at all advisable to have this occur with digital signals.

It is highly advise about to use SPLIT function with WSJT-X, FT-4 and 
FT-8 modes.  If your radio is old and slow and does not quickly switch 
between VFO A and VFO B, the Fake It is suggested.

73

Bob, K4TAX


On 8/29/2019 11:15 AM, Andy Durbin wrote:
> "Am I right to assume that I should set it back to flat when doing FT4/8?"
>
> If you do FT4 and FT8 right, as in using WSJT-X "split mode", the signal modulation frequency cannot be outside the range 1,500 to 2,000 Hz.  Why would it be desirable to have a flat TX equalizer response?
>
> Flat is certainly desirable for RX and for some rigs Flat is not the same a None.
>
> 73,
> Andy, k3wyc
>
>
>
>
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