Conventional analogue units had always been further developed over the years and adapted to the technologies available on the market. Once the available digital components were actually able to cope with technological demands, analogue technology was replaced by DSP technology at SEIDEL. The manufacturer SEIDEL was able to launch the latest product of the PIEPS development team onto the market together with their sales partner STUBAI Mountain Sport in the 2003 season and put their technology lead to the test with the PIEPS DSP. More than 30 years experience and well over 100,000 PIEPS units sold are a guarantee of the safety, reliability and innovation of the PIEPS products. The PIEPS DSP is the first patented 3-antenna-transceiver (2003) worldwide with integrated Mark and Scan function for easiest use for companion rescue.