Mike,
we have verified the output from WSJT-X is clean, this is not an issue
that needs fixing in WSJT-X. Note also that on Linux and macOS no such
distortion is present.
73
Bill
G4WJS.
On 16/02/2021 04:18, Black Michael via wsjt-devel wrote:
Patch to fix the problem....
index 8e442d05f..81a978852 100644
--- a/widgets/mainwindow.cpp
+++ b/widgets/mainwindow.cpp
@@ -1288,6 +1288,7 @@ void MainWindow::readSettings()
// setup initial value of tx attenuator
m_block_pwr_tooltip = true;
ui->outAttenuation->setValue (m_settings->value ("OutAttenuation", 0).toInt
());
+ on_outAttenuation_valueChanged(ui->outAttenuation->value());
m_block_pwr_tooltip = false;
ui->sbCQTxFreq->setValue (m_settings->value ("CQTxFreq", 260).toInt());
m_noSuffix=m_settings->value("NoSuffix",false).toBool();
@@ -7424,7 +7425,7 @@ void MainWindow::transmit (double snr)
void MainWindow::on_outAttenuation_valueChanged (int a)
{
QString tt_str;
- qreal dBAttn {a / 10.}; // slider interpreted as dB / 100
+ qreal dBAttn {a / 10. + 3}; // slider interpreted as dB / 100 (+3 to
keep minimize artifacts)
if (m_tune && m_config.pwrBandTuneMemory()) {
tt_str = tr ("Tune digital gain ");
} else {
Mike W9MDB
On Monday, February 15, 2021, 07:36:18 AM CST, Bill
Somerville<g4...@classdesign.com> wrote:
Mike,
the "nastiness" you refer to is more than 65 dB down. As far as we have been
able to determine it is due to either Windows or VAC. My money is on Windows since VB
Cable exhibits the same behaviour, although that is not conclusive. Note that 65 dB down
is below the distortion added by almost all transmitters. We are pretty certain Qt is not
the cause since when the Pwr slider is at 0dB Qt does nothing with the samples other than
copy them to the Windows MME audio buffers.
73
Bill
G4WJS.
On 15/02/2021 13:23, Black Michael via wsjt-devel wrote:
It's not just the waterfall....that nastiness gets transmitted too.
Mike W9MDB
On Monday, February 15, 2021, 02:53:44 AM CST, Reino Talarmo<reino.tala...@kolumbus.fi> wrote:
Hi Mike and Bill,
I looked those *.wav files using v2.4.0-rc1 and noted interesting presentation
difference, when I had Flatten activated or non-activated. Especially the
waterfall display changed a lot. It was difficult to see those multiple
sidebands in non-flatten display totally independent of gain and zero settings.
In spectrum display I can see the carrier and weak sidebands at 310 Hz or so.
In both flattened and non-flattened spectrum other than the 310 Hz sidebands
are really weak some are just a pixel or two and others none.Could the
flattening do more than modify the frequency amplitude and be an additional
reason for a bad waterfall display?
73, Reino OH3mA
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