diff --git a/spacelab_transmitter/spacelabtransmitter.py b/spacelab_transmitter/spacelabtransmitter.py
index 62b4057..33b260f 100644
--- a/spacelab_transmitter/spacelabtransmitter.py
+++ b/spacelab_transmitter/spacelabtransmitter.py
@@ -214,6 +214,7 @@ def _build_widgets(self):
         cell = Gtk.CellRendererText()
         self.combobox_satellite.pack_start(cell, True)
         self.combobox_satellite.add_attribute(cell, "text", 0)
+        self.combobox_satellite.connect("changed", self.on_combobox_satellite_changed)
 
         # Preferences dialog
         self.button_preferences = self.builder.get_object("button_preferences")
@@ -810,6 +811,10 @@ def on_switch_button_clicked(self, false, button):
             self.button_deactivate_payload.set_sensitive(True)
             self.button_get_payload_data.set_sensitive(True)
 
+    def on_combobox_satellite_changed(self, combobox):
+        modulation, frequency, baudrate, sync_word, protocol = self._get_link_info()
+        self.entry_carrier_frequency.set_text(str(int(frequency)))
+
     def on_combobox_sdr_changed(self, combobox):
         if self.combobox_sdr.get_active() == 0:   # USRP
             self.spinbutton_tx_gain.set_range(0, 90)
diff --git a/spacelab_transmitter/version.py b/spacelab_transmitter/version.py
index bc70130..6fa12c0 100644
--- a/spacelab_transmitter/version.py
+++ b/spacelab_transmitter/version.py
@@ -24,7 +24,7 @@
 __copyright__   = "Copyright The SpaceLab-Transmitter Contributors"
 __credits__     = ["Gabriel Mariano Marcelino, Vitória Beatriz Bianchin"]
 __license__     = "GPLv3"
-__version__     = "0.4.12"
+__version__     = "0.4.13"
 __maintainer__  = "Gabriel Mariano Marcelino - PU5GMA"
 __email__       = "gabriel.mm8@gmail.com"
 __status__      = "Development"