diff --git a/schainpy/model/io/jroIO_usrp.py b/schainpy/model/io/jroIO_usrp.py
index 3720b13..e9f10f5 100644
--- a/schainpy/model/io/jroIO_usrp.py
+++ b/schainpy/model/io/jroIO_usrp.py
@@ -188,8 +188,7 @@ class USRPReader(ProcessingUnit):
                     ippKm = 60,
                     online = False,
                     delay = 60,
-                    buffer_size = None,
-                    nbuffer = 1024,
+                    buffer_size = 1024,
                     **kwargs):
         '''
         In this method we should set all initial parameters.
@@ -207,9 +206,6 @@ class USRPReader(ProcessingUnit):
             delay
         '''
         
-        if not buffer_size:
-            buffer_size = nbuffer
-        
         if not os.path.isdir(path):
             raise ValueError, "[Reading] Directory %s does not exist" %path