[TenTec] TX EQ = -14 dB for PSK31 (resent)

[Martin AA6E]

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