diff --git a/dataClasses/AEvent.cpp b/dataClasses/AEvent.cpp
index 79601b861a07cee908e7277ff2b52e55983cf502..1baa662e57cbcc62a3a5cebd83af577ae6914ab5 100644
--- a/dataClasses/AEvent.cpp
+++ b/dataClasses/AEvent.cpp
@@ -27,18 +27,6 @@ AEvent::~AEvent() {
 	delete fInputEvent;
 }
 
-void AEvent::SetRawDataFile(const char* inprawfile, const char* treename) {
-
-	TString iFileName = inprawfile;
-	TFile *fraw = new TFile(iFileName.Data());
-	if ( !fraw->IsOpen() ) {
-		Error("SetRawDataFile", "File %s was not opened and won't be processed", iFileName.Data());
-	}
-	TTree *traw = (TTree*)fraw->Get(treename);
-	if (!traw) {
-		Error("SetRawDataFile", "Tree %s was not found in file %s", treename, iFileName.Data());
-	}
-}
 
 void AEvent::ProcessEvent() {
 
@@ -132,7 +120,6 @@ void AEvent::SetGraphs() {
 
 void AEvent::SetCFD() {
 
-//	Double_t level = 100.;	//is necessary to find cfd amplitude value closest to zero
 	Double_t time = 0;
 	Double_t mytime = fCFtimeDelay;
 	fGraphCFD->Set(fNPoints);
@@ -142,15 +129,11 @@ void AEvent::SetCFD() {
 	Double_t TmaxCFD = 0., TminCFD = 0.;	
 	Double_t ampCFD;
 	const Double_t timeStep = 0.1;
-	Int_t i = 0;
-
-//вместо цикла по точкам нужно сделать "цикл" по графику 
-
+	Int_t i = 0; //for graph 
+ 
+	//while goes by the graph with the step of timeStep
 	while( mytime < (200. - fCFtimeDelay) ) {
 
-	//	fAmpCFD[i] = fGraphSignal->Eval(mytime)*fCFratio*(-1);
-		//cout<<"jncfe "<<fGraphSignal->Eval(mytime)*fCFratio*(-1)<<endl;
-		//fGraphSignal->Eval(mytime)*fCFratio*(-1) + fGraphSignal->Eval(mytime - 0.6)
 		ampCFD = fGraphSignal->Eval(mytime)*fCFratio*(-1) + fGraphSignal->Eval(mytime - fCFtimeDelay);
 		fGraphCFD->SetPoint(i, mytime, ampCFD);
 
@@ -169,42 +152,8 @@ void AEvent::SetCFD() {
 		i++;
 		mytime = mytime + timeStep;
 	}
-//
-
-/*	for (Int_t i=0; i<fNPoints; i++) {
-
-		//CFD method
-		if(i>fCFtimeDelay) { // условие, чтобы не выскочить из размера массива ( обрезает границы на fCFtimeDelay)
-			fAmpCFD[i] = fAmpPos[i]*fCFratio*(-1);
-			fAmpCFD[i] = fAmpCFD[i] + fAmpPos[i - fCFtimeDelay];
-			fGraphCFD->SetPoint(i, fTime[i], fAmpCFD[i]);
-		}
-
-		//point for max CFD amplitude
-		if(fAmpCFD[i] > maxCFD) {
-			maxCFD = fAmpCFD[i];
-			TmaxCFD = fTime[i];
-//			imax = i;
-		}
 
-		//point for min CFD amplitude
-		if(fAmpCFD[i] < minCFD) {
-			minCFD = fAmpCFD[i];
-			TminCFD = fTime[i];
-//			imin = i;
-		}
-
-	}*/
-
-/*	//finding "zero" of CFD amplitude
-	for(Int_t j = imin; j < imax; j++) {   
-		if(abs(fAmpCFD[j]) < level) {
-			level = abs(fAmpCFD[j]);
-			fTimeCFD = fTime[j];
-		}
-	}
-*/
-	//I want to find zero of CFD using graph and eval
+	//looking for the first point with the closest values to 0 and writing to fTimeCFD
 	time = TminCFD;
 	while( (fGraphCFD->Eval(time) <= 0) && (time <= TmaxCFD) /*&& (time >= TminCFD)*/ ) {
 		fTimeCFD = time;
@@ -221,7 +170,6 @@ void AEvent::FindFrontProperties() {
 
 	const Double_t timeStep = 0.05;	//in ns
 	Double_t time = 0;			//in ns
-//	Int_t NumM = 0.;
 
 	if (!fGraphSignal) {
 		Warning("AEvent::FindFrontProperties", "Graph was not set");
@@ -229,10 +177,8 @@ void AEvent::FindFrontProperties() {
 	}
 
 	//TODO search of minimum should be done from the lower edge on the time axis
-//	cout << "Event!!!!!!!!!!!!!" << endl;
-//	while( fGraphSignal->Eval(time) >= minHeight*fAmpMax && time>0) {
+
 	while (fGraphSignal->Eval(time) <= maxHeight*fAmpMax && time<200.) {
-//		cout << fAmpMax << "\t" << fGraphSignal->Eval(time) << "\t" << fTimeAmpMax << "\t" << time << endl;
 		fTime90 = time;
 		time = time + timeStep;
 	};
@@ -242,23 +188,17 @@ void AEvent::FindFrontProperties() {
 		fTime10 = time;
 		time = time - timeStep;
 	}
-//	cout << "Found time10 " << fTime10 << "\t" << fGraphSignal->Eval(fTime10) << "\t" << minHeight*fAmpMax << "\t" << fAmpMax << endl;
-//	cout << "Found time10 " << fTime10 << "\t" << TMath::Abs(fGraphSignal->Eval(fTime10) - minHeight*fAmpMax) / fAmpMax * 100 << endl;
-//	cout << "Found time90 " << fTime90 << "\t" << GetT_90() << endl;
-
-//	cout<< "Time90 - time10 "<< fTime90 - fTime10 << endl;
-//	if(fTime90 - fTime10 == 0.25 ) { cout<< "Zero !!"<<endl; }
 
 	TF1 *fit1 = new TF1("fit1","[1]*x+[0]");	//function for one parameter fitting in the range of pmin-pmax
 	fit1->SetRange(fTime10,fTime90);
-//	fGraphSignal->Fit(fit1,"RQ","goff");
+
 	fGraphSignal->Fit(fit1,"RQN","goff");
 	fEdgeSlope = fit1->GetParameter(1);
 	fEdgeXi = fit1->GetChisquare();
 
 	delete fit1;
 }
-////////
+
 Double_t AEvent::FindZeroLevel() {
 
 	SetGraphs();
@@ -291,8 +231,6 @@ void AEvent::SetChargeCFD(Int_t tmin, Int_t tmax) {
 		}
 	}
 	fChargeCFD = integral*time_sig/res;
-//	cout<<fCharge<<endl;
-//	printf("\nIntegral is %f , charge is %lf \n", integral, fCharge);
 
 	return;
 
diff --git a/dataClasses/AEvent.h b/dataClasses/AEvent.h
index a3ead24a132478add8c8cecc19c72855ae3c64ea..46923a18c4b319e587ae5d1795b0136a82374d33 100644
--- a/dataClasses/AEvent.h
+++ b/dataClasses/AEvent.h
@@ -77,9 +77,11 @@ public:
 	Double_t GetEdgeXi();
 
 	Double_t GetfCFD();
+
 	Double_t GetOnefTime(Int_t i);
+
 	Double_t GetOnefAmpPos(Int_t i);
-	void SetRawDataFile(const char* inprawfile, const char* treename);
+
 	void ProcessEvent();
 	void SetInputEvent(RawEvent** event);
 
@@ -118,11 +120,14 @@ public:
 	//in range of (tmin,tmax) in ns)
 	//CFD time is taken as a start point
 
+	void SetLED(Double_t threshold = 0.001);
+	//leading edge discriminator
+
 private:
 	void Init();
 	void SetMaxAmplitudes();
 	void SetGraphs();
-	void SetCFD();
+	void SetCFD(); 	//constant fraction discriminator method
 };
 
 #endif /* DATACLASSES_AEVENT_H_ */
diff --git a/macros/histCorr.C b/macros/histCorr.C
index ff9c4b9a45f697f32a1125a3a703b5e052496b25..8af3226e2fa49a5cca2a74005e1305c0bd1ffe30 100644
--- a/macros/histCorr.C
+++ b/macros/histCorr.C
@@ -7,7 +7,7 @@ void histCorr(
 		const char *foldername = "8_2",
 //		const char *ext = ".eps",
 		const char *ext = ".gif",
-		const Bool_t can1 = 1, const Bool_t can2 = 1, const Bool_t can3 = 1, const Bool_t can4 = 1, const Bool_t can5 = 1)
+		const Bool_t can1 = 0, const Bool_t can2 = 0, const Bool_t can3 = 0, const Bool_t can4 = 0, const Bool_t can5 = 1)
 {
 	gSystem->Load("../libData.so");
 	TFile *f = new TFile(Form("../data/dataDSR4/%s", filename));
@@ -170,6 +170,8 @@ void histCorr(
 
 	if (can5) {
 		TCanvas *c5 = new TCanvas("c5", "Changing CFD parameters");
+		c5->Divide(1,2);
+		c5->cd(1);
 
 		TH1F *h12 = new TH1F("h12", "Delta tau CFD",100, -10., 30.);
 
@@ -183,6 +185,19 @@ void histCorr(
 		h12->Fit(fGaus, "R");
 		gStyle->SetOptFit();
 
+		c5->cd(2);
+		TH3F *h3d = new TH3F("h3d","3d histo",  100, -10, 30, 125, 0, 5e-9, 125, 0, 5e-9);
+		t->Draw("Ach1.fChargeCFD : Ach0.fChargeCFD : (Ach0.fTimeCFD - Ach1.fTimeCFD) >> h3d","","");
+
+		h3d->GetXaxis()->SetTitle("\\Delta \\tau_{0-1} [ns]");
+		h3d->GetXaxis()->CenterTitle();
+
+		h3d->GetYaxis()->SetTitle("Q_{0} [C]");
+		h3d->GetYaxis()->CenterTitle();
+
+		h3d->GetZaxis()->SetTitle("Q_{1} [C]");
+		h3d->GetZaxis()->CenterTitle();
+
 		c5->Update();
 		//c5->Print(Form("../macros/picsDRS4/file%s/TimeDiffCFD_0.7_3%s", foldername, ext));