diff --git a/apps/grgsm_trx b/apps/grgsm_trx
index eb7fbdb..b925fc1 100755
--- a/apps/grgsm_trx
+++ b/apps/grgsm_trx
@@ -96,20 +96,27 @@
 
 		# TRX specific
 		s += " TRX interface specific\n" \
-			 "  -i --remote-addr  Set remote address (default 127.0.0.1)\n" \
-			 "  -p --base-port    Set base port number (default 5700)\n\n"
+			 "  -i --remote-addr  Set remote address (default %s)\n" \
+			 "  -p --base-port    Set base port number (default %d)\n\n"
 
 		# PHY specific
 		s += " Radio interface specific\n" \
 			 "  -a --device-args  Set device arguments\n" \
 			 "  -s --sample-rate  Set sample rate\n" \
-			 "  -g --rx-gain      Set RX gain (default 30)\n" \
-			 "  -G --tx-gain      Set TX gain (default 10)\n" \
-			 "     --rx-antenna   Set RX antenna (default RX2)\n" \
-			 "     --tx-antenna   Set TX antenna (default TX/RX)\n" \
-			 "     --ppm          Set frequency correction (default 0)\n"
+			 "  -g --rx-gain      Set RX gain (default %d)\n" \
+			 "  -G --tx-gain      Set TX gain (default %d)\n" \
+			 "     --rx-antenna   Set RX antenna (default %s)\n" \
+			 "     --tx-antenna   Set TX antenna (default %s)\n" \
+			 "     --ppm          Set frequency correction (default %d)\n"
 
-		print(s)
+		print(s % (
+			self.remote_addr,
+			self.base_port,
+			self.phy_rx_gain,
+			self.phy_tx_gain,
+			self.phy_rx_antenna,
+			self.phy_tx_antenna,
+			self.phy_ppm))
 
 	def parse_argv(self):
 		try: