diff --git a/clients/tde/src/part/scope/part.cpp b/clients/tde/src/part/scope/part.cpp
index 274480a..52cae83 100644
--- a/clients/tde/src/part/scope/part.cpp
+++ b/clients/tde/src/part/scope/part.cpp
@@ -2679,10 +2679,10 @@ void ScopePart::processMathTraces() {
 				}
 			}
 
-			m_traceWidget->setSamples(m_maxNumberOfTraces-1+m_currentOpChannel, outputValues);
-			m_traceWidget->setPositions(m_maxNumberOfTraces-1+m_currentOpChannel, outputPositions);
-			m_base->traceZoomWidget->setSamples(m_maxNumberOfTraces-1+m_currentOpChannel, outputValues);
-			m_base->traceZoomWidget->setPositions(m_maxNumberOfTraces-1+m_currentOpChannel, outputPositions);
+			m_traceWidget->setSamples(m_maxNumberOfTraces-1+traceno, outputValues);
+			m_traceWidget->setPositions(m_maxNumberOfTraces-1+traceno, outputPositions);
+			m_base->traceZoomWidget->setSamples(m_maxNumberOfTraces-1+traceno, outputValues);
+			m_base->traceZoomWidget->setPositions(m_maxNumberOfTraces-1+traceno, outputPositions);
 		}
 #ifdef ENABLE_FFT
 		else if (m_mathOperator[traceno] == "FFT") {
@@ -2750,10 +2750,10 @@ void ScopePart::processMathTraces() {
 			free(ffts_input);
 			free(ffts_output);
 
-			m_traceWidget->setSamples(m_maxNumberOfTraces-1+m_currentOpChannel, outputValues);
-			m_traceWidget->setPositions(m_maxNumberOfTraces-1+m_currentOpChannel, outputPositions);
-			m_base->traceZoomWidget->setSamples(m_maxNumberOfTraces-1+m_currentOpChannel, outputValues);
-			m_base->traceZoomWidget->setPositions(m_maxNumberOfTraces-1+m_currentOpChannel, outputPositions);
+			m_traceWidget->setSamples(m_maxNumberOfTraces-1+traceno, outputValues);
+			m_traceWidget->setPositions(m_maxNumberOfTraces-1+traceno, outputPositions);
+			m_base->traceZoomWidget->setSamples(m_maxNumberOfTraces-1+traceno, outputValues);
+			m_base->traceZoomWidget->setPositions(m_maxNumberOfTraces-1+traceno, outputPositions);
 		}
 #endif // ENABLE_FFT
 		else {
@@ -2764,10 +2764,10 @@ void ScopePart::processMathTraces() {
 				outputValues[i] = 0;
 			}
 
-			m_traceWidget->setSamples(m_maxNumberOfTraces-1+m_currentOpChannel, outputValues);
-			m_traceWidget->setPositions(m_maxNumberOfTraces-1+m_currentOpChannel, outputPositions);
-			m_base->traceZoomWidget->setSamples(m_maxNumberOfTraces-1+m_currentOpChannel, outputValues);
-			m_base->traceZoomWidget->setPositions(m_maxNumberOfTraces-1+m_currentOpChannel, outputPositions);
+			m_traceWidget->setSamples(m_maxNumberOfTraces-1+traceno, outputValues);
+			m_traceWidget->setPositions(m_maxNumberOfTraces-1+traceno, outputPositions);
+			m_base->traceZoomWidget->setSamples(m_maxNumberOfTraces-1+traceno, outputValues);
+			m_base->traceZoomWidget->setPositions(m_maxNumberOfTraces-1+traceno, outputPositions);
 		}
 	}
 }