LifeLONGBackCountrySkier wrote a review of Pieps DSP Smart Transmitter on February 17, 2009
#1 this beacon is not downward compatible, i.e. it does not recognize and recieve signals from older analog beacons. This is probable because Piep's tweaked the bandwidth to increase their range. and because their software needs to be re-written, again, to account for those who still have their old analog beacons in use. Owning a beacon that does not receive all other units available is not a good idea, no matter what.
#2 At least we know who sponsors Andrew McLean, but does that equal a valid opinion on which beacon is best? NO! Don't buy into the hype! In this case it just might cost u ur life.
#3 the magnetic switch used inside the Pieps DSP is proven to be effected by small low power magnets and radio transmissions turning the unit OFF! or to receive in many cases. This is a serious flaw that should be seriously considered as a liability to all DSP users.
#4 The DSP continues to produce poor performance in the field when matched to all other beacons. Speed and ease of use are not associated with this product.