Q15x25 mode uses fifteen PSK streams to return an effective 2500 baud data
rate - if all goes well. In tests on HF, Q15x25 was not very robust at all.
It would work well with a strong, clean link but under typical HF conditions
it slowed down considerably. In some conditions, HF Packet at 300 baud
provided better throughput than Q15x25 mode at 2500 baud.
As in the story of the tortoise and the hare, an emphasis on getting through
can be much more productive than concentrating all effort upon simply going
faster... Sometimes less is more.
73 DE Charles Brabham, N5PVL
----- Original Message -----
From: "Pavel Milanes Costa" <[email protected]>
To: "FLDigi Alpha" <[email protected]>
Sent: Wednesday, September 15, 2010 4:22 PM
Subject: Custom PSK? (aka. faster PSK?)
Hi my friends,
Here in Camaguey Cuba we are having great fun with fldigi+flarq (3.21.0AK,
on linux and windows) in 2m VHF freqs, but I was inquired by a ham friend
about a custom PSK mode inspired for the variety of PSK modes (31, 63,
125, 250, etc, for a faster file transfers with flarq)
Or in defect of that a preset with PSK-1000, PSK-2000 or even PSK-3000?
For transfering files/chating, etc in a local city over a clean chanel on
VHF, the S/N are great enough for test/try a more speed full mode.
I think: why not? Even with other mode, not has to be PSK...
In searching for a more faster transfers on a clean VHF channels what mode
do you recommend?
There are a software, method, technical reason or a legal reason for not
developing a custom settings or more speed full preset for PSK mode for
use in VHF localy?
This is only a question/suggestion, I wait for your answer my friends.
--
CO7WT
Ing. Pavel Milanes Costa
=======================================================================
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