diff --git a/plugins/channeltx/moddatv/datvmod.cpp b/plugins/channeltx/moddatv/datvmod.cpp
index a0a75e5e1..9ec7d1e71 100644
--- a/plugins/channeltx/moddatv/datvmod.cpp
+++ b/plugins/channeltx/moddatv/datvmod.cpp
@@ -52,6 +52,7 @@ MESSAGE_CLASS_DEFINITION(DATVMod::MsgConfigureTsFileName, Message)
 MESSAGE_CLASS_DEFINITION(DATVMod::MsgConfigureTsFileSourceSeek, Message)
 MESSAGE_CLASS_DEFINITION(DATVMod::MsgConfigureTsFileSourceStreamTiming, Message)
 MESSAGE_CLASS_DEFINITION(DATVMod::MsgGetUDPBitrate, Message)
+MESSAGE_CLASS_DEFINITION(DATVMod::MsgGetUDPBufferUtilization, Message)
 
 const char* const DATVMod::m_channelIdURI = "sdrangel.channeltx.moddatv";
 const char* const DATVMod::m_channelId = "DATVMod";
@@ -185,6 +186,12 @@ bool DATVMod::handleMessage(const Message& cmd)
 
         return true;
     }
+    else if (MsgGetUDPBufferUtilization::match(cmd))
+    {
+        m_basebandSource->getInputMessageQueue()->push(DATVMod::MsgGetUDPBufferUtilization::create());
+
+        return true;
+    }
     else
     {
         return false;
diff --git a/plugins/channeltx/moddatv/datvmod.h b/plugins/channeltx/moddatv/datvmod.h
index 9b7fb86e8..7c36b0e2c 100644
--- a/plugins/channeltx/moddatv/datvmod.h
+++ b/plugins/channeltx/moddatv/datvmod.h
@@ -181,6 +181,23 @@ public:
         { }
     };
 
+    class MsgGetUDPBufferUtilization : public Message {
+        MESSAGE_CLASS_DECLARATION
+
+    public:
+
+        static MsgGetUDPBufferUtilization* create()
+        {
+            return new MsgGetUDPBufferUtilization();
+        }
+
+    private:
+
+        MsgGetUDPBufferUtilization() :
+            Message()
+        { }
+    };
+
     //=================================================================
 
     DATVMod(DeviceAPI *deviceAPI);
diff --git a/plugins/channeltx/moddatv/datvmodbaseband.cpp b/plugins/channeltx/moddatv/datvmodbaseband.cpp
index b4e3af124..d1dfe5c0b 100644
--- a/plugins/channeltx/moddatv/datvmodbaseband.cpp
+++ b/plugins/channeltx/moddatv/datvmodbaseband.cpp
@@ -192,6 +192,11 @@ bool DATVModBaseband::handleMessage(const Message& cmd)
         m_source.reportUDPBitrate();
         return true;
     }
+    else if (DATVMod::MsgGetUDPBufferUtilization::match(cmd))
+    {
+        m_source.reportUDPBufferUtilization();
+        return true;
+    }
     else
     {
         return false;
diff --git a/plugins/channeltx/moddatv/datvmodgui.cpp b/plugins/channeltx/moddatv/datvmodgui.cpp
index 2acbf2129..643de1006 100644
--- a/plugins/channeltx/moddatv/datvmodgui.cpp
+++ b/plugins/channeltx/moddatv/datvmodgui.cpp
@@ -98,6 +98,12 @@ DATVModGUI::DATVModGUI(PluginAPI* pluginAPI, DeviceUISet *deviceUISet, BasebandS
 
     connect(getInputMessageQueue(), SIGNAL(messageEnqueued()), this, SLOT(handleSourceMessages()));
 
+#ifndef _WIN32
+    // Only currently works on Windows, so hide on other OSes
+    ui->udpBufferUtilization->setVisible(false);
+    ui->udpBufferUtilizationLine->setVisible(false);
+#endif
+
     displaySettings();
     applySettings(true);
     if (!m_settings.m_tsFileName.isEmpty())
@@ -174,6 +180,13 @@ bool DATVModGUI::handleMessage(const Message& message)
         m_tickMsgOutstanding = false;
         return true;
     }
+    else if (DATVModReport::MsgReportUDPBufferUtilization::match(message))
+    {
+        DATVModReport::MsgReportUDPBufferUtilization& report = (DATVModReport::MsgReportUDPBufferUtilization&)message;
+        ui->udpBufferUtilization->setText(tr("%1%").arg(report.getUtilization(), 0, 'f', 1));
+        m_tickMsgOutstanding = false;
+        return true;
+    }
     else if (DATVMod::MsgConfigureDATVMod::match(message))
     {
         const DATVMod::MsgConfigureDATVMod& cfg = (DATVMod::MsgConfigureDATVMod&) message;
@@ -602,6 +615,7 @@ void DATVModGUI::tick()
         {
             m_tickMsgOutstanding = true;
             m_datvMod->getInputMessageQueue()->push(DATVMod::MsgGetUDPBitrate::create());
+            m_datvMod->getInputMessageQueue()->push(DATVMod::MsgGetUDPBufferUtilization::create());
         }
     }
 }
diff --git a/plugins/channeltx/moddatv/datvmodgui.ui b/plugins/channeltx/moddatv/datvmodgui.ui
index 2eff43ce1..f33e011ab 100644
--- a/plugins/channeltx/moddatv/datvmodgui.ui
+++ b/plugins/channeltx/moddatv/datvmodgui.ui
@@ -568,6 +568,23 @@
         </property>
        </widget>
       </item>
+      <item>
+       <widget class="Line" name="udpBufferUtilizationLine">
+        <property name="orientation">
+         <enum>Qt::Vertical</enum>
+        </property>
+       </widget>
+      </item>
+      <item>
+       <widget class="QLabel" name="udpBufferUtilization">
+        <property name="toolTip">
+         <string>Indicates how full the UDP receive buffer is. If this reaches 100%, packets will likely be dropped.</string>
+        </property>
+        <property name="text">
+         <string>0%</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </item>
     <item>
diff --git a/plugins/channeltx/moddatv/datvmodreport.cpp b/plugins/channeltx/moddatv/datvmodreport.cpp
index 91dd081b2..fc2cb340a 100644
--- a/plugins/channeltx/moddatv/datvmodreport.cpp
+++ b/plugins/channeltx/moddatv/datvmodreport.cpp
@@ -22,6 +22,7 @@ MESSAGE_CLASS_DEFINITION(DATVModReport::MsgReportTsFileSourceStreamTiming, Messa
 MESSAGE_CLASS_DEFINITION(DATVModReport::MsgReportTsFileSourceStreamData, Message)
 MESSAGE_CLASS_DEFINITION(DATVModReport::MsgReportRates, Message)
 MESSAGE_CLASS_DEFINITION(DATVModReport::MsgReportUDPBitrate, Message)
+MESSAGE_CLASS_DEFINITION(DATVModReport::MsgReportUDPBufferUtilization, Message)
 
 DATVModReport::DATVModReport()
 { }
diff --git a/plugins/channeltx/moddatv/datvmodreport.h b/plugins/channeltx/moddatv/datvmodreport.h
index 368ce5b1a..7589cc76f 100644
--- a/plugins/channeltx/moddatv/datvmodreport.h
+++ b/plugins/channeltx/moddatv/datvmodreport.h
@@ -125,6 +125,27 @@ public:
         { }
     };
 
+    class MsgReportUDPBufferUtilization : public Message
+    {
+        MESSAGE_CLASS_DECLARATION
+
+    public:
+        float getUtilization() const { return m_utilization; }
+
+        static MsgReportUDPBufferUtilization* create(int utilization)
+        {
+            return new MsgReportUDPBufferUtilization(utilization);
+        }
+
+    protected:
+        float m_utilization;
+
+        MsgReportUDPBufferUtilization(int utilization) :
+            Message(),
+            m_utilization(utilization)
+        { }
+    };
+
 public:
     DATVModReport();
     ~DATVModReport();
diff --git a/plugins/channeltx/moddatv/datvmodsettings.h b/plugins/channeltx/moddatv/datvmodsettings.h
index 63490de7e..25a2c5289 100644
--- a/plugins/channeltx/moddatv/datvmodsettings.h
+++ b/plugins/channeltx/moddatv/datvmodsettings.h
@@ -108,6 +108,8 @@ struct DATVModSettings
     static DATVModulation mapModulation(const QString& string);
     static QString mapModulation(DATVModulation modulation);
 
+    static const int m_udpBufferSize = 5000000;
+
 };
 
 #endif /* PLUGINS_CHANNELTX_MODDATV_DATVMODSETTINGS_H_ */
diff --git a/plugins/channeltx/moddatv/datvmodsource.cpp b/plugins/channeltx/moddatv/datvmodsource.cpp
index 70917e498..bfbb4b4dd 100644
--- a/plugins/channeltx/moddatv/datvmodsource.cpp
+++ b/plugins/channeltx/moddatv/datvmodsource.cpp
@@ -43,6 +43,11 @@ extern "C"
 #include "datvmodreport.h"
 #include "datvmodsource.h"
 
+#ifdef _WIN32
+#include <winsock.h>
+#pragma comment(lib, "Ws2_32.lib")
+#endif
+
 const int DATVModSource::m_levelNbSamples = 10000; // every 10ms
 
 // Get transport stream bitrate from file
@@ -223,6 +228,7 @@ DATVModSource::DATVModSource() :
     m_udpByteCount(0),
     m_udpBufferIdx(0),
     m_udpBufferCount(0),
+    m_udpMaxBufferUtilization(0),
     m_sampleRate(0),
     m_channelSampleRate(1000000),
     m_channelFrequencyOffset(0),
@@ -337,6 +343,8 @@ void DATVModSource::modulateSample()
                 && ((m_udpSocket != nullptr) && m_udpSocket->hasPendingDatagrams())
             )
             {
+                updateUDPBufferUtilization();
+
                 // Get transport stream packets from UDP - buffer if more than one
                 QNetworkDatagram datagram = m_udpSocket->receiveDatagram();
                 QByteArray ba = datagram.data();
@@ -577,6 +585,28 @@ void DATVModSource::reportUDPBitrate()
     m_udpByteCount = 0;
 }
 
+void DATVModSource::updateUDPBufferUtilization()
+{
+#ifdef _WIN32
+    u_long count;
+    ioctlsocket(m_udpSocket->socketDescriptor(), FIONREAD, &count);
+    if (count > m_udpMaxBufferUtilization) {
+        m_udpMaxBufferUtilization = count;
+    }
+#else
+    // On linux, ioctl(s, SIOCINQ, &count); only returns length of first datagram, so we can't support this
+#endif
+}
+
+void DATVModSource::reportUDPBufferUtilization()
+{
+    // Report maximum utilization since last call
+    updateUDPBufferUtilization();
+    if (getMessageQueueToGUI())
+        getMessageQueueToGUI()->push(DATVModReport::MsgReportUDPBufferUtilization::create(m_udpMaxBufferUtilization / (float)DATVModSettings::m_udpBufferSize * 100.0));
+    m_udpMaxBufferUtilization = 0;
+}
+
 void DATVModSource::applyChannelSettings(int channelSampleRate, int channelFrequencyOffset, bool force)
 {
     qDebug() << "DATVModSource::applyChannelSettings:"
@@ -680,7 +710,7 @@ void DATVModSource::applySettings(const DATVModSettings& settings, bool force)
         {
             m_udpSocket = new QUdpSocket();
             m_udpSocket->bind(QHostAddress(settings.m_udpAddress), settings.m_udpPort);
-            m_udpSocket->setSocketOption(QAbstractSocket::ReceiveBufferSizeSocketOption, 1000000);
+            m_udpSocket->setSocketOption(QAbstractSocket::ReceiveBufferSizeSocketOption, DATVModSettings::m_udpBufferSize);
             m_udpTimingStart = boost::chrono::steady_clock::now();
             m_udpByteCount = 0;
         }
diff --git a/plugins/channeltx/moddatv/datvmodsource.h b/plugins/channeltx/moddatv/datvmodsource.h
index 6e35c8d4a..95ccc4052 100644
--- a/plugins/channeltx/moddatv/datvmodsource.h
+++ b/plugins/channeltx/moddatv/datvmodsource.h
@@ -70,6 +70,7 @@ public:
     void seekTsFileStream(int seekPercentage);
     void reportTsFileSourceStreamTiming();
     void reportUDPBitrate();
+    void reportUDPBufferUtilization();
 
 private:
     uint8_t m_mpegTS[188];                                      //!< MPEG transport stream packet
@@ -99,6 +100,7 @@ private:
     uint8_t m_udpBuffer[188*10];
     int m_udpBufferIdx;                                         //!< TS frame index into buffer
     int m_udpBufferCount;                                       //!< Number of TS frames in buffer
+    int m_udpMaxBufferUtilization;
 
     int m_sampleRate;
     int m_channelSampleRate;
@@ -131,6 +133,7 @@ private:
     int getTSBitrate(const QString& filename);
     int getDVBSDataBitrate(const DATVModSettings& settings);
     void checkBitrates();
+    void updateUDPBufferUtilization();
 
     MessageQueue *getMessageQueueToGUI() { return m_messageQueueToGUI; }