From 4f2f02b580aaa01fda5570e0f2684943d2ddd26b Mon Sep 17 00:00:00 2001
From: Roman Zeyde <roman.zeyde@gmail.com>
Date: Mon, 21 Jul 2014 14:13:29 +0300
Subject: [PATCH] raise an error if no carrier

---
 recv.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/recv.py b/recv.py
index 97c8786..a4e3af6 100755
--- a/recv.py
+++ b/recv.py
@@ -60,7 +60,7 @@ def detect(samples, freq):
             report_carrier(bufs, begin=begin)
             break
     else:
-        return None
+        raise ValueError('No carrier detected')
 
     log.debug('Buffered %d ms of audio', len(bufs))