diff --git a/ibadatfile/ibadatfile.py b/ibadatfile/ibadatfile.py
index eaae470..62a714d 100644
--- a/ibadatfile/ibadatfile.py
+++ b/ibadatfile/ibadatfile.py
@@ -62,6 +62,11 @@ def pda_type(self) -> str:
         """Return the channel unit."""
         return self.channel.QueryInfoByName("$PDA_Typ")
 
+    
+    def tbased(self):
+        """Return the channel sampling rate for each channel."""
+        return float(self.channel.QueryInfoByName("$PDA_Tbase"))
+
     def data(self) -> np.array:
         """Return the channel data."""
         if self.channel.IsDefaultTimebased():