diff --git a/teletext/vbi/config.py b/teletext/vbi/config.py
index bb34f2a..e0ad9a9 100644
--- a/teletext/vbi/config.py
+++ b/teletext/vbi/config.py
@@ -29,8 +29,8 @@ class Config(object):
         },
         'saa7131': {
             'sample_rate': 27000000.0,
-            'line_length': 1600,
-            'line_start_range': (0, 15),
+            'line_length': 1440,
+            'line_start_range': (0, 20),
         }
     }