Dear Frank,
I allow myself to answer instead of the development team, they will correct
later if i'am wrong.
Reducing the receiver bandwidth, in general case, will not help improve the
signal-to-noise ratio in WSJT-X. Or if it is the case it is because you output
a too strong BF signal and
spacing
On 22/09/2018 11:13, David Alloza wrote:
> I saw that it was possible to use a "tone spacing" * 4, could it help to
decode a signal that would have suffered from Doppler?
> How to decode this signal in reception? Does WSJT-X do the inverse
conversion in RX mode?
> 73,
> D
Dear all,
With several OM located in the French Alps we try to make FT8 communication on
the 2M band using various reflectors.
We succes some communications using aircraft reflexion.
However, the Doppler effect makes things difficult and most of the time the
decoding fails.
I saw that it was
Hi,
There is a "easy to reproduct" bug in the RC3 version
The sequence:
170900 -17 0.1 1272 ~ CQ 3B8MM LG89
170918 Tx 1272 ~ 3B8MM F4HTQ JN25
170930 -15 0.1 1271 ~ CQ 3B8MM LG89
170945 Tx 1272 ~ 3B8MM F4HTQ JN25
171015 Tx 1272 ~ 3B8MM F4HTQ JN25
171000
David --
On 4/6/2018 9:08 AM, David Alloza wrote:
> I am wondering how we can decode FT8 message send by a frequency
> drift transmitter .
> Do we know from what level of frequency drift a message become
> impossible to decode ?
> Do you have any idea how the minimum SNR decod
Dear developers,
I am wondering how we can decode FT8 message send by a frequency drift
transmitter .
Do we know from what level of frequency drift a message become impossible to
decode ?
Do you have any idea how the minimum SNR decoding level is impacted by a
frequency drift?
Regards,
David
Hi,
I would like to add something to the discussion.
At my location (JN25UE) at maximum propagation ( near noon) , the FT8 band's
noise floor on the 30M is 5db higher than on the rest of the 30M band.
The concentration of traffic on the narrow 2.5khz (certainly at excessive
power) causes a
Hello Mike,
I agree with Gary.
We can consider JT65 as obsolete on HF bands if we have FT8 and JT9.
One solution would be quick out JT65 on WSJT-X configuration, keep JT9, and
split FT8 into 2k adjacent allocation. One location for CQ from southern
hemisphere and other for CQ from northern
Hi Bill,
Lock Tx=Rx was useful with my too drifting Tx. When I use FT8 autoseq the
drifting is automatically compensed along the QSO.
Is there anyway to keep this behavior ?
My 73,
David F4HTQ.
De : Bill Somerville [mailto:g4...@classdesign.com]
Envoyé : mercredi 18 octobre
Hello,
I strongly agree with Pino. ( I planned to write the same request this week
end).
JT modes bands become desertic, and the QRP contact is more and more
difficult.
I understand why automatic sequence was implemented in FT8 only, but the
reality is that QSO in JT mode become more dificult to
-Message d'origine-
De : Joe Taylor [mailto:j...@princeton.edu]
Envoyé : vendredi 25 août 2017 19:16
À : WSJT software development
Objet : Re: [wsjt-devel] A technical question..
Hi David,
Welcome to this list!
On 8/25/2017 9:20 AM, David Alloza wrote:
> I would like to know how you evalu
a developer myself and I am
admiring the work done (for my career see here:
https://en.linkedin.com/in/david-alloza-6689295/en)
I have a question about the SNR calculation performed in the JT9 and JT65
modes of WSJT-X.
I looked at the source code, but I fail to identify the part that answers my
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