Bob,
Interesting suggestions. I've been using a QDX for some time and it does pretty much all the modes it should do with little config changes. Rise/Fall - 80/60, Min. Samples 180, TX Shift - 0.
Tried your suggestions on the QMX and no go. The Audio processing was changed in item #12 in QMX Firmware update 007. From then on it was broken except for a few modes like Thor as Dave indicated by his testing. The new 018 firmware didn't change anything for digital modes including unable to use TxID without it killing TX after the ID.
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On May 16, 2024, at 12:00, Bob Cameron, VK2YQA via <
bob3bob3@...> wrote:
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 <HK9LwHSLF0nBY0XS.png> |
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
|
?
