Il 17/10/21 19:03, Bill Somerville via
wsjt-devel ha scritto:
On 17/10/2021 21:38, Marco Calistri
via wsjt-devel wrote:
Il 17/10/21 17:31, Bill Somerville
via wsjt-devel ha scritto:
On
On 17/10/2021 21:38, Marco Calistri via wsjt-devel wrote:
Il 17/10/21 17:31, Bill Somerville via wsjt-devel ha scritto:
On 17/10/2021 21:11, Marco Calistri via wsjt-devel wrote:
Il 17/10/21 16:52, Kevin McQuiggin (SFU) ha scritto:
Hi Marco:
Did you follow the steps to record a reference
Il 17/10/21 17:31, Bill Somerville via
wsjt-devel ha scritto:
On 17/10/2021 21:11, Marco Calistri
via wsjt-devel wrote:
Il 17/10/21 16:52, Kevin McQuiggin
(SFU) ha scritto:
Hi
Marco:
On 17/10/2021 21:11, Marco Calistri via wsjt-devel wrote:
Il 17/10/21 16:52, Kevin McQuiggin (SFU) ha scritto:
Hi Marco:
Did you follow the steps to record a reference spectrum first? You
have to record a minute or so of noise in order for the program to be
able to compute gain figures
Il 17/10/21 16:52, Kevin McQuiggin (SFU) ha scritto:
Hi Marco:
Did you follow the steps to record a reference spectrum first? You
have to record a minute or so of noise in order for the program to be
able to compute gain figures which are then used to flatten frequency
response. I am not
Hi Marco:
Did you follow the steps to record a reference spectrum first? You have to
record a minute or so of noise in order for the program to be able to compute
gain figures which are then used to flatten frequency response. I am not sure
what would happen if you activated reference
Il 16/10/21 17:30, Kevin McQuiggin via
wsjt-devel ha scritto:
Hi All:
There is a pretty good article on the why and how of
reference spectrum use by Bob KA1GT at http://www.bobatkins.com/radio/WSJTX_flatten.html.
His site is
Hi All:
There is a pretty good article on the why and how of reference spectrum use by
Bob KA1GT at http://www.bobatkins.com/radio/WSJTX_flatten.html. His site is
targeted primarily at EME and UHF-and-above users, but the information applies
to use of the reference spectrum at HF as well.
Hi Bill,
I will take a look into the manual and I will try to measure it.
73, Patrik 9A5CW
On Sat, Oct 16, 2021 at 10:18 PM Bill Somerville via wsjt-devel <
wsjt-devel@lists.sourceforge.net> wrote:
> On 16/10/2021 21:09, Patrick 9A5CW via wsjt-devel wrote:
> > Hi Reino,
> > no you are wrong,
On 16/10/2021 21:09, Patrick 9A5CW via wsjt-devel wrote:
Hi Reino,
no you are wrong, the filter is wide enough, and I never pressed any
buttons on my old IC706mk2 radio.
I rarely use any kind of filter on JT digi modes, as narrow as I can
go is 1800 Hz and that's only when I have high noise.
I can replicate the problem. It doesn't change decoding, but it does change
the SNR to a false high number. Simply unchecking RefSpec and going to
Flatten, makes the problem go away. (It is most noticeable on HF , where I
run FT8 a;; the time.) I have not checked it for any other mode.
I'll
Hi Hasan and Rich,
a couple of points worth considering:
1) the "Flatten" filter has no impact on decoding whatsoever, so having
"Flatten" checked or not will not change SNR numbers reported,
2) many rigs have considerable roll-off in receiver gain towards the
bottom end of the expected
The cause here for that was using Ref Spec instead of Flatten . I chased it
for weeks, it has no effect on decoding, but produces silly high SNR if
below 400 Hz or so. Simply uncheck Ref Spec in the Waterfall controls, and
go back to "Flatten" and I bet the problem goes away.
73, N0AN
Hasan
On
I can see the opposite possibility in this data. Looks like below 300 the
levels are low, high from about 300-400, then pretty consistent Red line here
is 50-point moving average of 5000 points. Above 2200 we're getting into the
region where bandpass limits might have an effect of some sort
Has anyone experienced exaggerated dB signal reports given by WSJT-X to
decoded FT8 signals of stations transmitting tone frequencies below 500 Hz?
I use a K3 with 2.8 KHz filter using WSJT-X Version 2.5.0 . I have also
seen this in earlier versions.
When stations using low audio tones are
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