diff --git a/plugins/channelrx/chanalyzer/chanalyzersink.cpp b/plugins/channelrx/chanalyzer/chanalyzersink.cpp
index 18e31d8c4..eb5d88142 100644
--- a/plugins/channelrx/chanalyzer/chanalyzersink.cpp
+++ b/plugins/channelrx/chanalyzer/chanalyzersink.cpp
@@ -66,7 +66,20 @@ void ChannelAnalyzerSink::feed(const SampleVector::const_iterator& begin, const
 
 		if (m_decimator.getDecim() == 1)
 		{
-	        processOneSample(c, sideband);
+            if (m_settings.m_rationalDownSample)
+            {
+                Complex cj;
+
+                if (m_interpolator.decimate(&m_interpolatorDistanceRemain, c, &cj))
+                {
+                    processOneSample(cj, sideband);
+                    m_interpolatorDistanceRemain += m_interpolatorDistance;
+                }
+            }
+            else
+            {
+    	        processOneSample(c, sideband);
+            }
 		}
 		else
 		{
@@ -311,6 +324,9 @@ void ChannelAnalyzerSink::applySettings(const ChannelAnalyzerSettings& settings,
 
     m_settings = settings;
 
+    qDebug() << "ChannelAnalyzerSink::applySettings:"
+        << " m_rationalDownSample: " << settings.m_rationalDownSample;
+
     if (doApplySampleRate) {
         applySampleRate();
     }