Added a block for generating Access Bursts
diff --git a/grc/transmitter/gsm_gen_test_ab.xml b/grc/transmitter/gsm_gen_test_ab.xml
new file mode 100644
index 0000000..3cb8b11
--- /dev/null
+++ b/grc/transmitter/gsm_gen_test_ab.xml
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<block>
+ <name>Gen Test AB</name>
+ <key>gsm_gen_test_ab</key>
+ <import>import grgsm</import>
+ <make>grgsm.gen_test_ab()</make>
+
+ <sink>
+ <name>bursts_in</name>
+ <type>message</type>
+ <optional>1</optional>
+ </sink>
+
+ <source>
+ <name>bursts_out</name>
+ <type>message</type>
+ <optional>1</optional>
+ </source>
+</block>