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:
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> It's not just the waterfall....that nastiness gets transmitted too.
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> Mike W9MDB
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> On Monday, February 15, 2021, 02:53:44 AM CST, Reino Talarmo
><reino.tala...@kolumbus.fi> wrote:
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> Hi Mike and Bill,
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> 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?
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> 73, Reino OH3mA
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