DIGICODE – Interference-free transmission! All models with digicode are distinguished by their digitally encoded transmission.		DIGICODE – Interference-free transmission! All models with digicode are distinguished by their digitally encoded transmission. This prevents prob- lems during group training and rules out the "cross talk effect", as it is known in specialist jargon. At the start of training, synchronisation takes place between the chest belt and the heart rate monitor. Consequently the monitor only receives data from its own chest belt. The heart rate readings are converted into digital data packages and transmitted to the receiver in the monitor. A check sum guaran- tees that the digital data packages are correct. In addition, the "time coding & ID procedure" guaran- tees that data transmission is significantly more secure compared to analogue heart rate monitors.