John K Gotwals wrote:
> (resent with plain text format)
>
> Due to the kind generosity of Ken, W8KEB, I have been able to use my Orion I
> with PSK31. It has been pointed out to me by N7GVV that the table in Figure
> 4-6 on page 43 of the Orion Operator's Manual suggests a TX EQ setting
> of -14 db when using a sound card interface with PSK31. Can someone explain
> why this setting is better than TX EQ = 0 dB?
>
> John, N9JG
>
Interesting question. Maybe 60 Hz hum rejection?
I've never really understood the philosophy of "TX EQ" vs "SSB L.F.
ROLLOFF". I would normally set the LF Rolloff to >= 150 Hz to reject
hum, and TX EQ to -10 dB, but I can't defend those settings very well!
73 Martin AA6E
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