add some words about 'what the heck is a frontend'

1 files changed, 16 insertions, 1 deletions

diff --git a/dvb-spec/HOWTO-use-the-frontend-api b/dvb-spec/HOWTO-use-the-frontend-api
index 538f5d05e..7f5456d1e 100644
--- a/dvb-spec/HOWTO-use-the-frontend-api
+++ b/dvb-spec/HOWTO-use-the-frontend-api
@@ -46,10 +46,25 @@ How to determine the API version?
 
 -------------------------------------------------------------------------------
 
-What do you have to do to set up a your frontend?
+What is a DVB frontend?
+
+  the term 'frontend' refers to this part of the DVB adapter which receives 
+  an MPEG transport stream and will feed it later into the Demultiplexer. 
+  Whenever you want to receive MPEG streams via satellite, antenna or cable 
+  you have to set up your frontend first.
+
+  When you watch on your DVB card or into your SetTopBox the frontend is usually
+  the combination of a demodulator chip and a small silver metal box with the
+  HF electronic. Usually the demodulator is built into this metal box.
+
+-------------------------------------------------------------------------------
+
+What do you have to do to set up your frontend?
 
   First you should try to determine the type of your frontend.
 
+	#include <linux/dvb/frontend.h>
+
 	struct dvb_frontend_info info;
 	int fd;