receiver: clarify receiver_impl.configure_receiver()

Change-Id: I98192f51c19162d6013607eb702314601fabf2c5
diff --git a/lib/receiver/receiver_impl.h b/lib/receiver/receiver_impl.h
index b880837..a7d7bc2 100644
--- a/lib/receiver/receiver_impl.h
+++ b/lib/receiver/receiver_impl.h
@@ -202,7 +202,9 @@
         void send_burst(burst_counter burst_nr, const unsigned char * burst_binary, uint8_t burst_type, size_t input_nr, unsigned int burst_start=-1);
 
         /**
-         * Configures burst types in different channels
+         * Initializes default burst detection config for all timeslots:
+         * TS0   (MF51): FB + SB + NB / DB
+         * TS1-7 (MF51): NB / DB
          */
         void configure_receiver();