On 11/13/18 8:38 AM, Rik Strobbe wrote:
> Hello Paul, all,
>
> the original slow JT9 submodes make better advantage of the cycle
> length than the ones currently used in SlowJT9. Eg.: where the
> current JT9-5 version has a transmission duration of 245 s, the
> original JT9-5 had a transmission duration of 292 s (both for a
> 300 s = 5 min cycle). And longer transmission duration = longer
> symbol length = better SNR. The theoretical advantage of the
> original submodes over the currenty used ones is 0.46 dB for
> JT9-2 and 0.74 dB for JT9-5.
>
> 73, Rik  ON7YD - OR7T