diff --git a/FSUDAQ.cpp b/FSUDAQ.cpp
index 57eb1e9..bb89c18 100644
--- a/FSUDAQ.cpp
+++ b/FSUDAQ.cpp
@@ -1714,39 +1714,46 @@ void FSUDAQ::OpenScope(){
   if( scope == nullptr ) {
     scope = new Scope(digi, nDigi, readDataThread);
     connect(scope, &Scope::SendLogMsg, this, &FSUDAQ::LogMsg);
+    
     connect(scope, &Scope::CloseWindow, this, [=](){
       bnStartACQ->setEnabled(true);
       bnStartACQ->setStyleSheet("background-color: green;");
       bnStopACQ->setEnabled(false);  
       bnStopACQ->setStyleSheet("");
     });
+
     connect(scope, &Scope::TellACQOnOff, this, [=](bool onOff){
-      if( scope  ) {
-        if( onOff ) {
+
+      isACQStarted = onOff;
+
+      if( onOff ){
+        if( influx && chkInflux->isChecked() && !elogName.isEmpty()) influx->AddDataPoint("SavingData,ExpName=" +  elogName.toStdString() + " value=1");
+        
+        if( scalar ){
           lbScalarACQStatus->setText("<font style=\"color: green;\"><b>ACQ On</b></font>");
-          if( influx && chkInflux->isChecked() && !elogName.isEmpty()) influx->AddDataPoint("SavingData,ExpName=" +  elogName.toStdString() + " value=1");
-        }else{
+          scalarTimer->start(ScalarUpdateinMiliSec); 
+        }
+
+        if( singleHistograms ) singleHistograms->startWork();
+        if( onlineAnalyzer ) onlineAnalyzer->startWork();
+
+      }else{
+        if( influx && chkInflux->isChecked() && !elogName.isEmpty()) influx->AddDataPoint("SavingData,ExpName=" +  elogName.toStdString() + " value=0");
+
+        if( scalar ){
           lbScalarACQStatus->setText("<font style=\"color: red;\"><b>ACQ Off</b></font>");
-          if( influx && chkInflux->isChecked() && !elogName.isEmpty()) influx->AddDataPoint("SavingData,ExpName=" +  elogName.toStdString() + " value=0");
-        }
-        if( influx && chkInflux->isChecked()){
-          influx->WriteData(dataBaseName.toStdString());
-          influx->ClearDataPointsBuffer();
+          scalarTimer->stop(); 
         }
+
+        if( singleHistograms ) singleHistograms->stopWork();
+        if( onlineAnalyzer ) onlineAnalyzer->stopWork();
+
       }
 
-      if( digiSettings ) digiSettings->setEnabled(!onOff);
-      if( singleHistograms ) {
-        if( onOff ) {
-          singleHistograms->startWork();
-        }else{
-          singleHistograms->stopWork();
-        }
-      }
+      if( digiSettings ) digiSettings->EnableButtons(!onOff);
 
     });
 
-    if( scalar ) connect(scope, &Scope::UpdateScaler, scalarWorker, &ScalarWorker::UpdateScalar);
     connect(scope, &Scope::UpdateOtherPanels, this, [=](){ UpdateAllPanels(1); });
 
     scope->show();
diff --git a/Scope.cpp b/Scope.cpp
index 556aa80..372e719 100644
--- a/Scope.cpp
+++ b/Scope.cpp
@@ -289,9 +289,6 @@ Scope::Scope(Digitizer ** digi, unsigned int nDigi, ReadDataThread ** readDataTh
   });
   workerThread->start();
 
-  scalarTimer = new QTimer(this);
-  connect(scalarTimer, &QTimer::timeout, this, &Scope::UpdateScaler);
-
   enableSignalSlot = true;
 
 }
@@ -300,7 +297,7 @@ Scope::~Scope(){
   DebugPrint("%s", "Scope");
 
   scopeTimer->stop();
-  scalarTimer->stop();
+  // scalarTimer->stop();
 
   if( workerThread->isRunning() ){
     workerThread->quit();
@@ -435,7 +432,6 @@ void Scope::StartScope(){
   }
 
   scopeTimer->start(ScopeUpdateMiliSec);
-  scalarTimer->start(ScalarUpdateinMiliSec);
 
   bnScopeStart->setEnabled(false);
   bnScopeStart->setStyleSheet("");
@@ -458,7 +454,7 @@ void Scope::StopScope(){
 
   // printf("------ Scope::%s \n", __func__);
   scopeTimer->stop();
-  scalarTimer->stop();
+  // scalarTimer->stop();
 
   if( chkSoleRun->isChecked() ){
 
@@ -517,7 +513,7 @@ void Scope::StopScope(){
 
   }
 
-  runStatus->setStyleSheet(""); // cheated, don;t know why digi[iDigi]->GetACQStatusFromMemory(), sometimes return ACQ on
+  runStatus->setStyleSheet(""); // cheated, don;t know why digi[iDigi]->GetACQStatusFromMemory(), sometimes return ACQ one.
 
   emit UpdateOtherPanels();
 
diff --git a/Scope.h b/Scope.h
index d1268db..be68607 100644
--- a/Scope.h
+++ b/Scope.h
@@ -54,7 +54,6 @@ signals:
   void CloseWindow();
   void SendLogMsg(const QString &msg);
   void TellACQOnOff(const bool onOff);
-  void UpdateScaler();
   void UpdateOtherPanels();
 
 private:
@@ -90,7 +89,6 @@ private:
   unsigned short oldCh, oldDigi;
 
   ReadDataThread ** readDataThread;   
-  // TimingThread * updateScalarThread;
 
   bool enableSignalSlot;
 
@@ -152,8 +150,6 @@ private:
   QThread * workerThread;
   ScopeWorker * scopeWorker;
   QTimer * scopeTimer;
-  QTimer * scalarTimer;
-
 
 };