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FT4: Change Fortran code to NSPS=576 and make necessary accompanying

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changes on the C++ side. Basically works except that Tx audio has
incorrect DT and audio is truncated at the end. Also, command line
decoding using JT9 is not as sensitive as decoding from within WSJT-X.
This commit is contained in:
Steve Franke
2019-05-22 17:02:15 -05:00
parent 80307b64ad
commit a9623703b3
10 changed files with 31 additions and 32 deletions
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widgets/mainwindow.cpp
+5 -5
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@@ -1466,7 +1466,7 @@ void MainWindow::dataSink(qint64 frames)
}
m_fileToSave.clear ();
int samples=m_TRperiod*12000;
if(m_mode=="FT4") samples=18*3456;
if(m_mode=="FT4") samples=21*3456;
// the following is potential a threading hazard - not a good
// idea to pass pointer to be processed in another thread
@@ -3428,7 +3428,7 @@ void MainWindow::guiUpdate()
if(m_TRperiod==0) m_TRperiod=60.0;
txDuration=0.0;
if(m_modeTx=="FT4") txDuration=0.35 + 105*512/12000.0; // FT4
if(m_modeTx=="FT4") txDuration=1.0 + 105*576/12000.0; // FT4
if(m_modeTx=="FT8") txDuration=1.0 + 79*1920/12000.0; // FT8
if(m_modeTx=="JT4") txDuration=1.0 + 207.0*2520/11025.0; // JT4
if(m_modeTx=="JT9") txDuration=1.0 + 85.0*m_nsps/12000.0; // JT9
@@ -3748,7 +3748,7 @@ void MainWindow::guiUpdate()
genft4_(message, &ichk, msgsent, const_cast<char *> (ft4msgbits),
const_cast<int *>(itone), 37, 37);
int nsym=103;
int nsps=4*512;
int nsps=4*576;
float fsample=48000.0;
float f0=ui->TxFreqSpinBox->value() - m_XIT;
int nwave=(nsym+2)*nsps;
@@ -5652,7 +5652,7 @@ void MainWindow::on_actionFT4_triggered()
Q_EMIT FFTSize (m_FFTSize);
m_hsymStop=18;
setup_status_bar (bVHF);
m_toneSpacing=12000.0/512.0;
m_toneSpacing=12000.0/576.0;
ui->actionFT4->setChecked(true);
m_wideGraph->setMode(m_mode);
m_wideGraph->setModeTx(m_modeTx);
@@ -6949,7 +6949,7 @@ void MainWindow::transmit (double snr)
m_dateTimeSentTx3=QDateTime::currentDateTimeUtc();
toneSpacing=-2.0; //Transmit a pre-computed, filtered waveform.
Q_EMIT sendMessage (NUM_FT4_SYMBOLS,
512.0, ui->TxFreqSpinBox->value() - m_XIT,
576.0, ui->TxFreqSpinBox->value() - m_XIT,
toneSpacing, m_soundOutput, m_config.audio_output_channel(),
true, false, snr, m_TRperiod);
}