diff --git a/Correlator/DataService/ApplicationDataServiceImpl.cs b/Correlator/DataService/ApplicationDataServiceImpl.cs
index d7f0b68..3274774 100644
--- a/Correlator/DataService/ApplicationDataServiceImpl.cs
+++ b/Correlator/DataService/ApplicationDataServiceImpl.cs
@@ -163,10 +163,14 @@
         {
             using (var manager = new DataBaseManager())
             {
-                var result = manager
-                    .Table<SampleRateModel>()
-                    .First(x => x.WorkMode == mode);
-                return result?.SampleRate ?? 7500;
+                var result = manager.Table<SampleRateModel>();
+                if (!result.Any())
+                {
+                    return 7500;
+                }
+
+                var sampleRateModel = result.First(x => x.WorkMode == mode);
+                return sampleRateModel.SampleRate;
             }
         }