Fixed BladeRF plugin LNA gain setting. Appended dB unit for gain

displays.

Readme.md

@@ -125,12 +125,13 @@ Done since the fork
   - Implemented trigger delay
   - Trigger on both edges
   - Spectrum histogram clear
+  - Trigger line display for all trigger modes
+  - Coarse and fine trigger level sliders
     
 =====
 To Do
 =====
 
-  - Trigger line display for all trigger modes
   - Level calibration
   - Enhance presets management (Edit, Move, Import/Export from/to human readable format like JSON)  
   - recording capability

plugins/samplesource/bladerf/bladerfgui.cpp

@@ -134,13 +134,13 @@ void BladerfGui::displaySettings()
 
 	ui->fcPos->setCurrentIndex((int) m_settings.m_fcPos);
 
-	ui->lnaGainText->setText(tr("%1").arg(m_settings.m_lnaGain));
+	ui->lnaGainText->setText(tr("%1dB").arg(m_settings.m_lnaGain*3));
 	ui->lna->setValue(m_settings.m_lnaGain);
 
-	ui->vga1Text->setText(tr("%1").arg(m_settings.m_vga1));
+	ui->vga1Text->setText(tr("%1dB").arg(m_settings.m_vga1));
 	ui->vga1->setValue(m_settings.m_vga1);
 
-	ui->vga2Text->setText(tr("%1").arg(m_settings.m_vga2));
+	ui->vga2Text->setText(tr("%1dBS").arg(m_settings.m_vga2));
 	ui->vga2->setValue(m_settings.m_vga2);
 
 	ui->xb200->setCurrentIndex(getXb200Index(m_settings.m_xb200, m_settings.m_xb200Path, m_settings.m_xb200Filter));
@@ -204,7 +204,7 @@ void BladerfGui::on_lna_valueChanged(int value)
 	if ((value < 0) || (value > 2))
 		return;
 
-	ui->lnaGainText->setText(tr("%1k").arg(value));
+	ui->lnaGainText->setText(tr("%1dB").arg(value*3));
 	m_settings.m_lnaGain = value;
 	sendSettings();
 }
@@ -214,7 +214,7 @@ void BladerfGui::on_vga1_valueChanged(int value)
 	if ((value < BLADERF_RXVGA1_GAIN_MIN) || (value > BLADERF_RXVGA1_GAIN_MAX))
 		return;
 
-	ui->vga1Text->setText(tr("%1").arg(value));
+	ui->vga1Text->setText(tr("%1dB").arg(value));
 	m_settings.m_vga1 = value;
 	sendSettings();
 }
@@ -224,7 +224,7 @@ void BladerfGui::on_vga2_valueChanged(int value)
 	if ((value < BLADERF_RXVGA2_GAIN_MIN) || (value > BLADERF_RXVGA2_GAIN_MAX))
 		return;
 
-	ui->vga2Text->setText(tr("%1").arg(value));
+	ui->vga2Text->setText(tr("%1dB").arg(value));
 	m_settings.m_vga2 = value;
 	sendSettings();
 }

plugins/samplesource/bladerf/bladerfgui.ui

@@ -438,7 +438,7 @@
      <item row="0" column="1">
       <widget class="QSlider" name="lna">
        <property name="enabled">
-        <bool>false</bool>
+        <bool>true</bool>
        </property>
        <property name="toolTip">
         <string>LNA amplification</string>