diff --git a/impl/src/config.h b/impl/src/config.h
index f82a9bb..756d6ab 100644
--- a/impl/src/config.h
+++ b/impl/src/config.h
@@ -5,7 +5,7 @@
 
 /*** TIMING CONFIG ***/
 
-#define TX_SWITCH_BACKOFF_PREAMBLE_MS          500   // only relevant if packet cannot be decoded
+#define TX_SWITCH_BACKOFF_PREAMBLE_MS           10   // only relevant if packet cannot be decoded
 #define TX_SWITCH_BACKOFF_END_OF_PACKET_MS       1
 #define TX_SWITCH_BACKOFF_AFTER_RX_ON          500   // time the transceiver must stay in RX mode
 
@@ -36,10 +36,10 @@
 
 #define SDR_IS_FULL_DUPLEX       0
 
-#define SDR_OVERSAMPLING         3  // integer factor!
+#define SDR_OVERSAMPLING         5  // integer factor!
 
 #define SDR_RX_SAMPLING_RATE     (SYMBOL_RATE * RRC_SPS * SDR_OVERSAMPLING)
-#define SDR_TX_SAMPLING_RATE     SDR_RX_SAMPLING_RATE
+#define SDR_TX_SAMPLING_RATE     (SDR_RX_SAMPLING_RATE)
 
 // actually transmitted or received signal frequencies, NOT the SDR center frequency.
 #define SDR_TX_FREQ       434.100e6f