diff --git a/grc/transmitter/gsm_txtime_setter.xml b/grc/transmitter/gsm_txtime_setter.xml
new file mode 100644
index 0000000..648f4d9
--- /dev/null
+++ b/grc/transmitter/gsm_txtime_setter.xml
@@ -0,0 +1,84 @@
+<?xml version="1.0"?>
+<block>
+  <name>txtime_setter</name>
+  <key>gsm_txtime_setter</key>
+  <import>import grgsm</import>
+  <make>grgsm.txtime_setter($init_fn if ($init_fn is not None) else 0xffffffff, $init_time_secs, $init_time_fracs, $time_hint_secs, $time_hint_fracs, $timing_advance, $delay_correction)</make>
+  
+  <callback>set_fn_time_reference($init_fn, $init_time_secs, $init_time_fracs)</callback>
+  <callback>set_time_hint($time_hint_secs, $time_hint_secs)</callback>
+  <callback>set_timing_advance($timing_advance)</callback>
+  <callback>set_delay_correction($delay_correction)</callback>
+
+  <param>
+    <name>init_fn</name>
+    <key>init_fn</key>
+    <value>None</value>
+    <type>raw</type>
+    <hide>part</hide>
+  </param>
+
+  <param>
+    <name>init_time_secs</name>
+    <key>init_time_secs</key>
+    <value>0</value>
+    <type>int</type>
+    <hide>part</hide>
+  </param>
+  <param>
+    <name>init_time_fracs</name>
+    <key>init_time_fracs</key>
+    <value>0</value>
+    <type>float</type>
+    <hide>part</hide>
+  </param>
+
+  <param>
+    <name>time_hint_secs</name>
+    <key>time_hint_secs</key>
+    <value>0</value>
+    <type>int</type>
+    <hide>part</hide>
+  </param>
+  <param>
+    <name>time_hint_fracs</name>
+    <key>time_hint_fracs</key>
+    <value>0</value>
+    <type>float</type>
+    <hide>part</hide>
+  </param>
+
+  <param>
+    <name>timing_advance</name>
+    <key>timing_advance</key>
+    <value>0</value>
+    <type>float</type>
+    <hide>part</hide>
+  </param>
+
+  <param>
+    <name>delay_correction</name>
+    <key>delay_correction</key>
+    <value>0</value>
+    <type>float</type>
+    <hide>part</hide>
+  </param>
+
+  <sink>
+    <name>fn_time</name>
+    <type>message</type>
+    <optional>1</optional>
+  </sink>
+
+  <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>