Joe Subich, W4TV-3 wrote:
>
>
> Bill,
>
>> David you may be suggesting that "in theory" but I would pay
>> *close attention* to what W0YK says. Ed wins many RTTY contests
>> including several current world records from P49X, and results
>> sometimes speak louder to me than theory (and I'm an engineer
>> if that means anything).
>
> Ed and I had an extensive off-line discussion concerning the K3
> filter options and RTTY. We both made multiple measurements of
> the composite bandwidth (roofing filter, DSP and dual passband
> filter) with several settings. The consensus is that the 200 Hz
> DSP settings work as long as the roofing filter is more than 250
> Hz wide.
>
That's interesting since there isn't a 250 Hz roofing filter. There's a 370
Hz and a 224 Hz, but no 250 Hz. What did you use for the 250 measurement
above or is that a calculated result? At any rate, I'll defer to Ed since
he's forgotten more about RTTY than I'll ever know, as his contest results
demonstrate. ;-)
73, Bill
--
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