diff --git a/FDTD/cartoperator.cpp b/FDTD/cartoperator.cpp
index 3cde987..0caafdb 100644
--- a/FDTD/cartoperator.cpp
+++ b/FDTD/cartoperator.cpp
@@ -15,6 +15,8 @@ void CartOperator::Init()
     CSX = NULL;
     MainOp=NULL;
     DualOp=NULL;
+	E_Ex_index = NULL;
+	E_Ex_delay = NULL;
     for (int n=0;n<3;++n)
     {
 		discLines[n]=NULL;
@@ -26,11 +28,14 @@ void CartOperator::Init()
 		vi[n]=NULL;
 		iv[n]=NULL;
 		ii[n]=NULL;
+		E_Ex_amp[n]=NULL;
 	}
 }
 
 void CartOperator::Reset()
 {
+	delete[] E_Ex_index;
+	delete[] E_Ex_delay;
 	for (int n=0;n<3;++n)
 	{
 		delete[] EC_C[n];
@@ -41,6 +46,7 @@ void CartOperator::Reset()
 		delete[] vi[n];
 		delete[] iv[n];
 		delete[] ii[n];
+		delete[] E_Ex_amp[n];
 	}
 	delete MainOp;
 	delete DualOp;
@@ -111,6 +117,8 @@ int CartOperator::CalcECOperator()
 	bool PEC[6]={0,0,0,0,0,0};
 	ApplyElectricBC(PEC);
 
+	if (CalcEFieldExcitation()==false) return -1;
+
     return 0;
 }
 
@@ -408,7 +416,7 @@ double CartOperator::CalcTimestep()
 	return 0;
 }
 
-unsigned int CartOperator::GetVoltageExcitation(unsigned int* &index, FDTD_FLOAT** &excit_amp, FDTD_FLOAT* &excit_delay)
+bool CartOperator::CalcEFieldExcitation()
 {
 	vector<unsigned int> vIndex;
 	vector<FDTD_FLOAT> vExcit[3];
@@ -436,7 +444,7 @@ unsigned int CartOperator::GetVoltageExcitation(unsigned int* &index, FDTD_FLOAT
 						vIndex.push_back(ipos);
 						for (int n=0;n<3;++n)
 						{
-							double delta=MainOp->GetIndexDelta(n,pos[n]);
+							double delta=MainOp->GetIndexDelta(n,pos[n])*gridDelta;
 							vExcit[n].push_back(elec->GetWeightedExcitation(n,coord)*delta);
 						}
 					}
@@ -444,5 +452,19 @@ unsigned int CartOperator::GetVoltageExcitation(unsigned int* &index, FDTD_FLOAT
 			}
 		}
 	}
-	cerr << "size: " << vIndex.size() << endl;
+	E_Ex_Count = vIndex.size();
+	delete[] E_Ex_index;
+	E_Ex_index = new unsigned int[E_Ex_Count];
+	delete[] E_Ex_delay;
+	E_Ex_delay = new FDTD_FLOAT[E_Ex_Count];
+	for (unsigned int i=0;i<E_Ex_Count;++i)
+		E_Ex_delay[i]=vIndex.at(i);
+	for (int n=0;n<3;++n)
+	{
+		delete[] E_Ex_amp[n];
+		E_Ex_amp[n] = new FDTD_FLOAT[E_Ex_Count];
+		for (unsigned int i=0;i<E_Ex_Count;++i)
+			E_Ex_amp[n][i]=vExcit[n].at(i);
+	}
+	return true;
 }
diff --git a/FDTD/cartoperator.h b/FDTD/cartoperator.h
index 67d483b..07a52ce 100644
--- a/FDTD/cartoperator.h
+++ b/FDTD/cartoperator.h
@@ -22,11 +22,6 @@ public:
 
 	double GetTimestep() {return dT;};
 
-	/*!
-	  Get the voltage excitations. Returns number of excitations, listed position in index, with amplitude in all 3 directions and a possible time delay.
-	  */
-	unsigned int GetVoltageExcitation(unsigned int* &index, FDTD_FLOAT** &excit_amp, FDTD_FLOAT* &excit_delay);
-
     void Reset();
 
 protected:
@@ -47,6 +42,14 @@ protected:
 	FDTD_FLOAT* ii[3]; //calc new current from old current
 	FDTD_FLOAT* iv[3]; //calc new current from old voltage
 
+	//E-Field Excitation
+	//!	  Calc the electric field excitation.
+	bool CalcEFieldExcitation();
+	unsigned int E_Ex_Count;
+	unsigned int* E_Ex_index;
+	FDTD_FLOAT* E_Ex_amp[3]; //represented as edge-voltages!!
+	FDTD_FLOAT* E_Ex_delay;
+
 	//Calc timestep only internal use
 	double CalcTimestep();
 
diff --git a/main.cpp b/main.cpp
index 6d4e2ea..2a65b41 100644
--- a/main.cpp
+++ b/main.cpp
@@ -21,12 +21,6 @@ int main(int argc, char *argv[])
 
 	cop.CalcECOperator();
 
-	unsigned int* index = NULL;
-	FDTD_FLOAT** amp=NULL;
-	FDTD_FLOAT* delay=NULL;
-
-	unsigned int nEx = cop.GetVoltageExcitation(index,amp,delay);
-
 	time_t OpDoneTime=time(NULL);
 
 	cerr << "Time for operator: " << difftime(OpDoneTime,startTime) << endl;
@@ -76,5 +70,7 @@ void BuildMSL(ContinuousStructure &CSX)
 	for (int n=0;n<=300;n+=10)
 		grid->AddDiscLine(1,(double)n);
 
+	grid->SetDeltaUnit(1e-3);
+
 	CSX.Write2XML("csx-files/MSL.xml");
 }
diff --git a/openEMS.pro b/openEMS.pro
index 0158306..1510f1e 100644
--- a/openEMS.pro
+++ b/openEMS.pro
@@ -9,7 +9,11 @@ TEMPLATE = app
 OBJECTS_DIR = obj
 INCLUDEPATH += ../CSXCAD
 LIBS += -L../CSXCAD \
-    -lCSXCAD
+    -lCSXCAD \
+    -L../fparser \
+    -lfparser \
+    -L../tinyxml \
+    -ltinyxml
 SOURCES += main.cpp \
     FDTD/cartoperator.cpp \
     tools/ErrorMsg.cpp \