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Re: [winfldigi] Fldigi "not working" with QMX - two issues solved


 

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Hi Dave, more to help with your testing rather than the L-R issue.

The TX "failure" for such MFSK audio as Olivia/Contestia/Thor/MFSK/Domino/IKFP/FSQ/RSID is "fixed" by reducing the QDX (and I assume QMX) minimum samples from the 480 default to something like 120-180. I also reduce the rise/fall times (2/40) to stop the raise cosine PTT inhibit, otherwise the TX chops on and off. FM picture sub modes are generally not pretty with random like line shifts.

Minimum samples at 120 is however not low enough for Thor 56 or faster/wider. I have a series of command buttons on flrig to change this and the audio level as needed.

The TX audio still sounds a little ragged, but I have had some successful Olivia 8/250 QSO's VK>EU. One day I'll do some SDR s/n threshold testing to see of there is any decode degradation.

Cheers Bob VK2YQA


On 16/5/24 23:38, Dave, W1HKJ wrote:



MODE
TX
COMMENTS
TUNE
yes

CW
no
single dit hears and then silence
CONTESTIA 8-250
no
starting tone and then silence; CONTESTIA uses shaped tones
DOMINO-EX
partial

HELL
partial
only FSK 245/105/80; received raster not distinct
MFSK
no
tx ends after first tone
MT63
no
amplitude/phase modulation
OFDM
no
amplitude/phase modulation
OLIVIA
no
tx ends after first tone
PSK, QPSK, 8PSK,PSKR
no
amplitude/phase modulation
RTTY
yes

THOR
partial
Micro, 4, 5, 8, 11 & 16;? higher baud rates the QMX does not follow the transition
THROB
no
amplitude/frequency modulation
?

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