diff --git a/Software/PC_Application/Traces/traceimportdialog.cpp b/Software/PC_Application/Traces/traceimportdialog.cpp
index f0a91c7..4f574fc 100644
--- a/Software/PC_Application/Traces/traceimportdialog.cpp
+++ b/Software/PC_Application/Traces/traceimportdialog.cpp
@@ -23,7 +23,8 @@ TraceImportDialog::~TraceImportDialog()
 
 void TraceImportDialog::on_buttonBox_accepted()
 {
-    tableModel->import(model);
+    auto traces = tableModel->import(model);
+    emit importFinsished(traces);
 }
 
 TraceParameterModel::TraceParameterModel(std::vector<Trace *> traces, QString prefix, QObject *parent)
@@ -153,17 +154,20 @@ Qt::ItemFlags TraceParameterModel::flags(const QModelIndex &index) const
     return (Qt::ItemFlags) flags;
 }
 
-void TraceParameterModel::import(TraceModel &model)
+std::vector<Trace *> TraceParameterModel::import(TraceModel &model)
 {
+    std::vector<Trace*> importedTraces;
     for(unsigned int i=0;i<params.size();i++) {
         if(params[i].enabled) {
             traces[i]->setColor(params[i].color);
             traces[i]->setName(params[i].name);
             model.addTrace(traces[i]);
+            importedTraces.push_back(traces[i]);
         } else {
             delete traces[i];
         }
     }
+    return importedTraces;
 }
 
 void TraceImportDialog::on_tableView_doubleClicked(const QModelIndex &index)
diff --git a/Software/PC_Application/Traces/traceimportdialog.h b/Software/PC_Application/Traces/traceimportdialog.h
index ff8aab8..19dc5e1 100644
--- a/Software/PC_Application/Traces/traceimportdialog.h
+++ b/Software/PC_Application/Traces/traceimportdialog.h
@@ -25,7 +25,7 @@ public:
     Qt::ItemFlags flags(const QModelIndex &index) const override;
 
     // adds all enabled traces to the model, deletes other traces
-    void import(TraceModel &model);
+    std::vector<Trace *> import(TraceModel &model);
 private:
     class Parameter {
     public:
@@ -50,6 +50,9 @@ private slots:
     void on_buttonBox_accepted();
     void on_tableView_doubleClicked(const QModelIndex &index);
 
+signals:
+    void importFinsished(const std::vector<Trace*> &traces);
+
 private:
     Ui::TraceImportDialog *ui;
     TraceModel &model;
diff --git a/Software/PC_Application/VNA/tracewidgetvna.cpp b/Software/PC_Application/VNA/tracewidgetvna.cpp
index a311e81..cdf6893 100644
--- a/Software/PC_Application/VNA/tracewidgetvna.cpp
+++ b/Software/PC_Application/VNA/tracewidgetvna.cpp
@@ -66,5 +66,13 @@ void TraceWidgetVNA::importDialog()
         prefix.append("_");
         auto i = new TraceImportDialog(model, traces, prefix);
         i->show();
+        if(filename.endsWith(".s2p")) {
+            // potential candidate to process via calibration/de-embedding
+            connect(i, &TraceImportDialog::importFinsished, [](const std::vector<Trace*> &traces) {
+                if(traces.size() == 4) {
+                    // all traces imported, can calculate calibration/de-embedding
+                }
+            });
+        }
     }
 }