diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp
index a51ba48..bae9d11 100644
--- a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/librevnadriver.cpp
@@ -3,6 +3,7 @@
 #include "manualcontroldialogV1.h"
 #include "manualcontroldialogvff.h"
 #include "manualcontroldialogvfe.h"
+#include "manualcontroldialogvfd.h"
 #include "deviceconfigurationdialogv1.h"
 #include "deviceconfigurationdialogvff.h"
 #include "deviceconfigurationdialogvfe.h"
@@ -108,6 +109,13 @@ public:
     }
 };
 
+static_assert(offsetof(Protocol::ManualControl, VFD.SourceFrequency) == 0, "Error");
+static_assert(offsetof(Protocol::ManualControl, VFD.LOFrequency) == 13, "Error");
+static_assert(offsetof(Protocol::ManualControl, VFD.DACFreqA) == 21, "Error");
+static_assert(offsetof(Protocol::ManualControl, VFD.DACFreqB) == 25, "Error");
+static_assert(offsetof(Protocol::ManualControl, VFD.DACAmpA) == 29, "Error");
+static_assert(offsetof(Protocol::ManualControl, VFD.DACAmpB) == 31, "Error");
+
 LibreVNADriver::LibreVNADriver()
 {
     connected = false;
@@ -127,6 +135,9 @@ LibreVNADriver::LibreVNADriver()
         case 1:
             manualControlDialog = new ManualControlDialogV1(*this);
             break;
+        case 0xFD:
+            manualControlDialog = new ManualControlDialogVFD(*this);
+            break;
         case 0xFE:
             manualControlDialog = new ManualControlDialogVFE(*this);
             break;
diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.cpp b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.cpp
new file mode 100644
index 0000000..ccc1dbc
--- /dev/null
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.cpp
@@ -0,0 +1,141 @@
+#include "manualcontroldialogVFD.h"
+
+#include "ui_manualcontroldialogVFD.h"
+#include "Util/util.h"
+
+#include <QComboBox>
+#include <QDebug>
+#include <QButtonGroup>
+#include <complex>
+
+
+using namespace std;
+
+ManualControlDialogVFD::ManualControlDialogVFD(LibreVNADriver &dev, QWidget *parent) :
+    QDialog(parent),
+    ui(new Ui::ManualControlDialogVFD),
+    dev(dev)
+{
+    ui->setupUi(this);
+    setAttribute(Qt::WA_DeleteOnClose);
+
+    emit dev.acquireControl();
+
+    ui->SourceFrequency->setUnit("Hz");
+    ui->SourceFrequency->setPrefixes(" MG");
+    ui->SourceFrequency->setPrecision(6);
+    ui->SourceFrequency->setValueQuiet(1000000000);
+
+    ui->LOFrequency->setUnit("Hz");
+    ui->LOFrequency->setPrefixes(" MG");
+    ui->LOFrequency->setPrecision(6);
+    ui->LOFrequency->setValueQuiet(1000000000);
+
+    ui->DACFrequencyA->setUnit("Hz");
+    ui->DACFrequencyA->setPrefixes(" kM");
+    ui->DACFrequencyA->setPrecision(6);
+    ui->DACFrequencyA->setValueQuiet(1000000);
+
+    ui->DACFrequencyB->setUnit("Hz");
+    ui->DACFrequencyB->setPrefixes(" kM");
+    ui->DACFrequencyB->setPrecision(6);
+    ui->DACFrequencyB->setValueQuiet(1000000);
+
+    ui->DACAmplitudeA->setValue(2047);
+    ui->DACAmplitudeB->setValue(2047);
+
+    auto updateVariableAtt = [=](unsigned int value){
+        ui->SourceVariableAttSlider->setValue(value);
+        ui->SourceVariableAttEntry->setValueQuiet(value);
+        UpdateDevice();
+    };
+    connect(ui->SourceVariableAttEntry, &SIUnitEdit::valueChanged, this, [=](double newval){
+        updateVariableAtt(newval);
+    });
+    connect(ui->SourceVariableAttSlider, &QSlider::sliderMoved, this, [=](int pos){
+        updateVariableAtt(pos);
+    });
+
+    // Readonly widgets
+    auto MakeReadOnly = [](QWidget* w) {
+        w->setAttribute(Qt::WA_TransparentForMouseEvents);
+        w->setFocusPolicy(Qt::NoFocus);
+    };
+    MakeReadOnly(ui->SourceLocked);
+    MakeReadOnly(ui->LOLocked);
+
+//    connect(&dev, &LibreVNADriver::receivedPacket, this, [=](const Protocol::PacketInfo &p){
+//            if(p.type == Protocol::PacketType::ManualStatus) {
+//                NewStatus(p.manualStatus);
+//            }
+//    }, Qt::QueuedConnection);
+
+    connect(ui->SourceCE, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->SourceRFEN, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->LOCE, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->LORFEN, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->SourceModEn, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->SourceAmp1En, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->SourceAmp2En, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->LOAmpEn, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+    connect(ui->DACEnable, &QCheckBox::toggled, [=](bool) { UpdateDevice(); });
+
+    connect(ui->SourceFilter, qOverload<int>(&QComboBox::activated), [=](int) { UpdateDevice(); });
+    connect(ui->SourceBandsel, qOverload<int>(&QComboBox::activated), [=](int) { UpdateDevice(); });
+    connect(ui->SourcePortSel, qOverload<int>(&QComboBox::activated), [=](int) { UpdateDevice(); });
+    connect(ui->LOMode, qOverload<int>(&QComboBox::activated), [=](int) { UpdateDevice(); });
+
+    connect(ui->SourceFrequency, &SIUnitEdit::valueChanged, [=](double) { UpdateDevice(); });
+    connect(ui->LOFrequency, &SIUnitEdit::valueChanged, [=](double) { UpdateDevice(); });
+    connect(ui->DACFrequencyA, &SIUnitEdit::valueChanged, [=](double) { UpdateDevice(); });
+    connect(ui->DACFrequencyB, &SIUnitEdit::valueChanged, [=](double) { UpdateDevice(); });
+
+    connect(ui->SourceStepAtt, qOverload<int>(&QSpinBox::valueChanged), [=](int) { UpdateDevice(); });
+    connect(ui->DACAmplitudeA, qOverload<int>(&QSpinBox::valueChanged), [=](int) { UpdateDevice(); });
+    connect(ui->DACAmplitudeB, qOverload<int>(&QSpinBox::valueChanged), [=](int) { UpdateDevice(); });
+
+    UpdateDevice();
+}
+
+ManualControlDialogVFD::~ManualControlDialogVFD()
+{
+    emit dev.releaseControl();
+    delete ui;
+}
+
+void ManualControlDialogVFD::UpdateDevice()
+{
+    Protocol::PacketInfo p;
+    p.type = Protocol::PacketType::ManualControl;
+    auto &m = p.manual.VFD;
+    // Source
+    m.SourceFrequency = ui->SourceFrequency->value();
+    m.SourceCE = ui->SourceCE->isChecked();
+    m.SourceRFEN = ui->SourceRFEN->isChecked();
+    m.SourceModEn = ui->SourceModEn->isChecked();
+    m.SourceAmp1En = ui->SourceAmp1En->isChecked();
+    m.SourceAmp2En = ui->SourceAmp2En->isChecked();
+    m.SourceBandSel = ui->SourceBandsel->currentIndex();
+    m.SourceFilter = ui->SourceFilter->currentIndex();
+    m.SourceVariableAttenuator = ui->SourceVariableAttSlider->value();
+    m.SourceStepAttenuator = ui->SourceStepAtt->value();
+    m.SourcePortSel = ui->SourcePortSel->currentIndex();
+
+    // LO
+    m.LOCE = ui->LOCE->isChecked();
+    m.LORFEN = ui->LOCE->isChecked();
+    m.LOAmplifierEN = ui->LOAmpEn->isChecked();
+    m.LOMode = ui->LOMode->currentIndex();
+    m.LOFrequency = ui->LOFrequency->value();
+
+    // DAC
+    m.DACFreqA = ui->DACFrequencyA->value();
+    m.DACFreqB = ui->DACFrequencyB->value();
+    m.DACAmpA = ui->DACAmplitudeA->value();
+    m.DACAmpB = ui->DACAmplitudeB->value();
+    m.DACEn = ui->DACEnable->isChecked();
+
+    qDebug() << "Updating manual control state";
+
+    dev.SendPacket(p);
+}
diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.h b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.h
new file mode 100644
index 0000000..750aea3
--- /dev/null
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.h
@@ -0,0 +1,77 @@
+#ifndef MANUALCONTROLDIALOGVFD_H
+#define MANUALCONTROLDIALOGVFD_H
+
+#include "librevnadriver.h"
+
+#include <QDialog>
+#include <complex>
+
+namespace Ui {
+class ManualControlDialogVFD;
+}
+
+class ManualControlDialogVFD : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit ManualControlDialogVFD(LibreVNADriver &dev, QWidget *parent = nullptr);
+    ~ManualControlDialogVFD();
+
+    void setHighSourceChipEnable(bool enable);
+    bool getHighSourceChipEnable();
+    void setHighSourceRFEnable(bool enable);
+    bool getHighSourceRFEnable();
+    bool getHighSourceLocked();
+    bool setHighSourcePower(int dBm);
+    int getHighSourcePower();
+    void setHighSourceFrequency(double f);
+    double getHighSourceFrequency();
+
+    enum class LPF {
+        M947,
+        M1880,
+        M3500,
+        None,
+    };
+
+    void setHighSourceLPF(LPF lpf);
+    LPF getHighSourceLPF();
+    void setLowSourceEnable(bool enable);
+    bool getLowSourceEnable();
+    bool setLowSourcePower(int mA);
+    int getLowSourcePower();
+    void setLowSourceFrequency(double f);
+    double getLowSourceFrequency();
+    void setHighband(bool high);
+    bool getHighband();
+    void setAttenuator(double att);
+    double getAttenuator();
+    void setAmplifierEnable(bool enable);
+    bool getAmplifierEnable();
+    bool setPortSwitch(int port);
+    int getPortSwitch();
+    void setLO1ChipEnable(bool enable);
+    bool getLO1ChipEnable();
+    void setLO1RFEnable(bool enable);
+    bool getLO1RFEnable();
+    bool getLO1Locked();
+    void setLO1Frequency(double f);
+    double getLO1Frequency();
+    void setIF1Frequency(double f);
+    double getIF1Frequency();
+    void setLO2Enable(bool enable);
+    bool getLO2Enable();
+    void setLO2Frequency(double f);
+    double getLO2Frequency();
+    void setIF2Frequency(double f);
+    double getIF2Frequency();
+
+
+private:
+    void UpdateDevice();
+    Ui::ManualControlDialogVFD *ui;
+    LibreVNADriver &dev;
+};
+
+#endif // MANUALCONTROLDIALOGV1_H
diff --git a/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.ui b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.ui
new file mode 100644
index 0000000..aba8701
--- /dev/null
+++ b/Software/PC_Application/LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.ui
@@ -0,0 +1,439 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ManualControlDialogVFD</class>
+ <widget class="QWidget" name="ManualControlDialogVFD">
+  <property name="windowModality">
+   <enum>Qt::ApplicationModal</enum>
+  </property>
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>640</width>
+    <height>453</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Manual Control</string>
+  </property>
+  <layout class="QHBoxLayout" name="horizontalLayout_2">
+   <item>
+    <widget class="QGroupBox" name="groupBox_10">
+     <property name="title">
+      <string>Signal Generation</string>
+     </property>
+     <layout class="QHBoxLayout" name="horizontalLayout">
+      <item>
+       <widget class="QGroupBox" name="groupBox_3">
+        <property name="title">
+         <string>Source</string>
+        </property>
+        <layout class="QFormLayout" name="formLayout_4">
+         <item row="4" column="0">
+          <widget class="QLabel" name="label_9">
+           <property name="text">
+            <string>Modulator:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="4" column="1">
+          <widget class="QCheckBox" name="SourceModEn">
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item row="5" column="0">
+          <widget class="QLabel" name="label_10">
+           <property name="text">
+            <string>Filter:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="5" column="1">
+          <widget class="QComboBox" name="SourceFilter">
+           <item>
+            <property name="text">
+             <string>81 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>130 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>213 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>345 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>550 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>910 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>1480 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>2370 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>3840 MHz</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>6200 MHz</string>
+            </property>
+           </item>
+          </widget>
+         </item>
+         <item row="6" column="0">
+          <widget class="QLabel" name="label_11">
+           <property name="text">
+            <string>Step Attenuator:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="6" column="1">
+          <widget class="QSpinBox" name="SourceStepAtt">
+           <property name="maximum">
+            <number>31</number>
+           </property>
+          </widget>
+         </item>
+         <item row="7" column="0">
+          <widget class="QLabel" name="label_14">
+           <property name="text">
+            <string>Variable Attenuator:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="7" column="1">
+          <layout class="QHBoxLayout" name="horizontalLayout_3">
+           <item>
+            <widget class="QSlider" name="SourceVariableAttSlider">
+             <property name="maximum">
+              <number>1023</number>
+             </property>
+             <property name="orientation">
+              <enum>Qt::Horizontal</enum>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="SIUnitEdit" name="SourceVariableAttEntry"/>
+           </item>
+          </layout>
+         </item>
+         <item row="8" column="0">
+          <widget class="QLabel" name="label_16">
+           <property name="text">
+            <string>Amplifier 1:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="8" column="1">
+          <widget class="QCheckBox" name="SourceAmp1En">
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item row="9" column="0">
+          <widget class="QLabel" name="label_17">
+           <property name="text">
+            <string>Amplifier 2:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="9" column="1">
+          <widget class="QCheckBox" name="SourceAmp2En">
+           <property name="text">
+            <string/>
+           </property>
+          </widget>
+         </item>
+         <item row="3" column="1">
+          <widget class="SIUnitEdit" name="SourceFrequency"/>
+         </item>
+         <item row="3" column="0">
+          <widget class="QLabel" name="label_2">
+           <property name="text">
+            <string>Frequency:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="10" column="0">
+          <widget class="QLabel" name="label_3">
+           <property name="text">
+            <string>Band Selection:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="10" column="1">
+          <widget class="QComboBox" name="SourceBandsel">
+           <item>
+            <property name="text">
+             <string>HF</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>LF</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>LF -20 dBm</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>LF -40 dBm</string>
+            </property>
+           </item>
+          </widget>
+         </item>
+         <item row="2" column="1">
+          <widget class="QCheckBox" name="SourceLocked">
+           <property name="enabled">
+            <bool>true</bool>
+           </property>
+           <property name="text">
+            <string>Locked</string>
+           </property>
+          </widget>
+         </item>
+         <item row="1" column="1">
+          <widget class="QCheckBox" name="SourceRFEN">
+           <property name="text">
+            <string>RF Enable</string>
+           </property>
+          </widget>
+         </item>
+         <item row="0" column="1">
+          <widget class="QCheckBox" name="SourceCE">
+           <property name="text">
+            <string>Chip Enable</string>
+           </property>
+          </widget>
+         </item>
+         <item row="11" column="0">
+          <widget class="QLabel" name="label_13">
+           <property name="text">
+            <string>Port Selection:</string>
+           </property>
+          </widget>
+         </item>
+         <item row="11" column="1">
+          <widget class="QComboBox" name="SourcePortSel">
+           <item>
+            <property name="text">
+             <string>Off</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>Port 1</string>
+            </property>
+           </item>
+           <item>
+            <property name="text">
+             <string>Port 2</string>
+            </property>
+           </item>
+          </widget>
+         </item>
+        </layout>
+       </widget>
+      </item>
+      <item>
+       <layout class="QVBoxLayout" name="verticalLayout">
+        <item>
+         <widget class="QGroupBox" name="groupBox_2">
+          <property name="title">
+           <string>LO PLL</string>
+          </property>
+          <layout class="QFormLayout" name="formLayout">
+           <item row="3" column="0">
+            <widget class="QLabel" name="label_5">
+             <property name="text">
+              <string>Frequency:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="3" column="1">
+            <widget class="SIUnitEdit" name="LOFrequency"/>
+           </item>
+           <item row="4" column="0">
+            <widget class="QLabel" name="label">
+             <property name="text">
+              <string>Mode:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="4" column="1">
+            <widget class="QComboBox" name="LOMode">
+             <item>
+              <property name="text">
+               <string>Internal - HF</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string>Internal -LF</string>
+              </property>
+             </item>
+             <item>
+              <property name="text">
+               <string>External</string>
+              </property>
+             </item>
+            </widget>
+           </item>
+           <item row="2" column="1">
+            <widget class="QCheckBox" name="LOLocked">
+             <property name="enabled">
+              <bool>true</bool>
+             </property>
+             <property name="text">
+              <string>Locked</string>
+             </property>
+            </widget>
+           </item>
+           <item row="1" column="1">
+            <widget class="QCheckBox" name="LORFEN">
+             <property name="text">
+              <string>RF Enable</string>
+             </property>
+            </widget>
+           </item>
+           <item row="0" column="1">
+            <widget class="QCheckBox" name="LOCE">
+             <property name="text">
+              <string>Chip Enable</string>
+             </property>
+            </widget>
+           </item>
+           <item row="5" column="0">
+            <widget class="QLabel" name="label_15">
+             <property name="text">
+              <string>Amplifier:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="5" column="1">
+            <widget class="QCheckBox" name="LOAmpEn">
+             <property name="text">
+              <string/>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </widget>
+        </item>
+        <item>
+         <widget class="QGroupBox" name="groupBox">
+          <property name="title">
+           <string>DAC</string>
+          </property>
+          <layout class="QFormLayout" name="formLayout_2">
+           <item row="0" column="0">
+            <widget class="QLabel" name="label_4">
+             <property name="text">
+              <string>Enabled:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="0" column="1">
+            <widget class="QCheckBox" name="DACEnable">
+             <property name="text">
+              <string/>
+             </property>
+            </widget>
+           </item>
+           <item row="1" column="0">
+            <widget class="QLabel" name="label_6">
+             <property name="text">
+              <string>Output A Frequency:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="1" column="1">
+            <widget class="SIUnitEdit" name="DACFrequencyA"/>
+           </item>
+           <item row="2" column="0">
+            <widget class="QLabel" name="label_7">
+             <property name="text">
+              <string>Output A Amplitude:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="2" column="1">
+            <widget class="QSpinBox" name="DACAmplitudeA">
+             <property name="maximum">
+              <number>2047</number>
+             </property>
+            </widget>
+           </item>
+           <item row="3" column="0">
+            <widget class="QLabel" name="label_8">
+             <property name="text">
+              <string>Output A Frequency:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="3" column="1">
+            <widget class="SIUnitEdit" name="DACFrequencyB"/>
+           </item>
+           <item row="4" column="0">
+            <widget class="QLabel" name="label_12">
+             <property name="text">
+              <string>Output A Amplitude:</string>
+             </property>
+            </widget>
+           </item>
+           <item row="4" column="1">
+            <widget class="QSpinBox" name="DACAmplitudeB">
+             <property name="maximum">
+              <number>2047</number>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </widget>
+        </item>
+       </layout>
+      </item>
+     </layout>
+    </widget>
+   </item>
+  </layout>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>SIUnitEdit</class>
+   <extends>QLineEdit</extends>
+   <header>CustomWidgets/siunitedit.h</header>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections/>
+</ui>
diff --git a/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro b/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro
index b677201..c0643ab 100644
--- a/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro
+++ b/Software/PC_Application/LibreVNA-GUI/LibreVNA-GUI.pro
@@ -34,6 +34,7 @@ HEADERS += \
     Device/LibreVNA/librevnatcpdriver.h \
     Device/LibreVNA/librevnausbdriver.h \
     Device/LibreVNA/manualcontroldialogV1.h \
+    Device/LibreVNA/manualcontroldialogvfd.h \
     Device/LibreVNA/manualcontroldialogvfe.h \
     Device/LibreVNA/manualcontroldialogvff.h \
     Device/LibreVNA/receivercaldialog.h \
@@ -199,6 +200,7 @@ SOURCES += \
     Device/LibreVNA/librevnatcpdriver.cpp \
     Device/LibreVNA/librevnausbdriver.cpp \
     Device/LibreVNA/manualcontroldialogV1.cpp \
+    Device/LibreVNA/manualcontroldialogvfd.cpp \
     Device/LibreVNA/manualcontroldialogvfe.cpp \
     Device/LibreVNA/manualcontroldialogvff.cpp \
     Device/LibreVNA/receivercaldialog.cpp \
@@ -359,6 +361,7 @@ FORMS += \
     Device/LibreVNA/frequencycaldialog.ui \
     Device/LibreVNA/librevnadriversettingswidget.ui \
     Device/LibreVNA/manualcontroldialogV1.ui \
+    Device/LibreVNA/manualcontroldialogvfd.ui \
     Device/LibreVNA/manualcontroldialogvfe.ui \
     Device/LibreVNA/manualcontroldialogvff.ui \
     Device/devicelog.ui \
diff --git a/Software/PC_Application/LibreVNA-Test/LibreVNA-Test.pro b/Software/PC_Application/LibreVNA-Test/LibreVNA-Test.pro
index 9c25927..2787bea 100644
--- a/Software/PC_Application/LibreVNA-Test/LibreVNA-Test.pro
+++ b/Software/PC_Application/LibreVNA-Test/LibreVNA-Test.pro
@@ -35,6 +35,7 @@ SOURCES +=  \
     ../LibreVNA-GUI/Device/LibreVNA/librevnatcpdriver.cpp \
     ../LibreVNA-GUI/Device/LibreVNA/librevnausbdriver.cpp \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogV1.cpp \
+    ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.cpp \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfe.cpp \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvff.cpp \
     ../LibreVNA-GUI/Device/LibreVNA/receivercaldialog.cpp \
@@ -221,6 +222,7 @@ HEADERS += \
     ../LibreVNA-GUI/Device/LibreVNA/librevnatcpdriver.h \
     ../LibreVNA-GUI/Device/LibreVNA/librevnausbdriver.h \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogV1.h \
+    ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.h \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfe.h \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvff.h \
     ../LibreVNA-GUI/Device/LibreVNA/receivercaldialog.h \
@@ -392,6 +394,7 @@ FORMS += \
     ../LibreVNA-GUI/Device/LibreVNA/librevnadriversettingswidget.ui \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogV1.ui \
     ../LibreVNA-GUI/Device/LibreVNA/Compound/compounddeviceeditdialog.ui \
+    ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfd.ui \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvfe.ui \
     ../LibreVNA-GUI/Device/LibreVNA/manualcontroldialogvff.ui \
     ../LibreVNA-GUI/Device/devicelog.ui \
diff --git a/Software/PC_Application/LibreVNA-Test/target_wrapper.bat b/Software/PC_Application/LibreVNA-Test/target_wrapper.bat
index 9c0c213..f9d74e2 100644
--- a/Software/PC_Application/LibreVNA-Test/target_wrapper.bat
+++ b/Software/PC_Application/LibreVNA-Test/target_wrapper.bat
@@ -1,10 +1,10 @@
 @echo off
 SetLocal EnableDelayedExpansion
-(set PATH=C:\Qt\6.2.4\mingw_64\bin;!PATH!)
+(set PATH=C:\Qt\6.8.0\mingw_64\bin;!PATH!)
 if defined QT_PLUGIN_PATH (
-    set QT_PLUGIN_PATH=C:\Qt\6.2.4\mingw_64\plugins;!QT_PLUGIN_PATH!
+    set QT_PLUGIN_PATH=C:\Qt\6.8.0\mingw_64\plugins;!QT_PLUGIN_PATH!
 ) else (
-    set QT_PLUGIN_PATH=C:\Qt\6.2.4\mingw_64\plugins
+    set QT_PLUGIN_PATH=C:\Qt\6.8.0\mingw_64\plugins
 )
 %*
 EndLocal
diff --git a/Software/VNA_embedded/Application/Communication/Protocol.hpp b/Software/VNA_embedded/Application/Communication/Protocol.hpp
index 8f92a77..5feaa6f 100644
--- a/Software/VNA_embedded/Application/Communication/Protocol.hpp
+++ b/Software/VNA_embedded/Application/Communication/Protocol.hpp
@@ -320,6 +320,38 @@ using ManualControl = struct _manualControl {
 		    uint32_t Samples;
 		    uint8_t WindowType :2;
 		} V1;
+        struct {
+            uint64_t SourceFrequency;
+
+            uint8_t SourceCE :1;
+            uint8_t SourceRFEN :1;
+            uint8_t SourceModEn :1;
+            uint8_t SourceAmp1En :1;
+            uint8_t SourceAmp2En :1;
+            uint8_t SourceBandSel :2;
+            uint8_t DACEn :1;
+
+            uint16_t SourceFilter :4;
+            uint16_t SourceVariableAttenuator :10;
+            uint16_t SourcePortSel :2;
+
+            uint8_t SourceStepAttenuator :5;
+
+            uint8_t LOCE :1;
+            uint8_t LORFEN :1;
+            uint8_t LOAmplifierEN :1;
+
+            uint8_t LOMode :2;
+            uint8_t padding1 :6;
+
+            uint64_t LOFrequency;
+
+            // DAC
+            uint32_t DACFreqA;
+            uint32_t DACFreqB;
+            uint16_t DACAmpA;
+            uint16_t DACAmpB;
+        } VFD;
 		struct {
 		    // Source
 		    uint8_t SourceCE :1;