Falls 6 times from 1 meter on a hardwood floor?

Is laying 10 hours in a heat chamber at 70°C?

Is laying 10 hours in a cold chamber at -25°C?

Is laying 1 hour in a water basin in 15 cm depth?

Is exposed 80 hours to direct sunlight?

Has a safety feature against involuntary or accidental leaving of the transmit mode?

All joints between essential parts are submitted to a tensile stress test of at least 10N (1kg)?


After this series of tests, the beacon has to be fully functional to meet the requirements of the standard!



  • Transmission frequency:
    457 kHz (457.000 Hz) ± 80 Hz

  • Signal strength is defined




  • Signal characteristics:
    Period: 1.000 ± 300 ms
    Pulse duration: ≥ 70 ms
    Pulse break: ≥ 400 ms


Use available PIEPS CHECKPOINTS in ski areas, huts and ski touring starting points to proof the sending parameter of your avalanche transceiver.

457 kHZ

is that wave length that permeates best through snow.


The less air in the snow is existing, the worse the signal can propagate and the receiving range is reduced. An extreme range reduction occurs at low snow thickness (<1m) in glacial ice, since it has only a very small portion of air. The recommended search strip widths are no longer valid! Is an avalanche transceiver sending signals with values ​​at the limit of standard or outside the standard, some receiving avalanche transceivers can be challenged with performance degradation.

Possible effects on send function:

  • Reduction in signal strength and therefore range reduction for faulty transmitter


Possible effects on search function:

  • Reduction of receiving range
  • Wrong direction and/or distance indication
  • Display of additional, non-existent transmitter


For all electronic devices, as well as metals and magnets, a minimum distance should be observed: 20 cm in SEND mode, 50 cm in SEARCH mode.

PIEPS DSP PRO/DSP SPORT/MICRO is equipped with an auto-antenna-switch. It detects external negativ influencing sources and reacts with an automatic switching of the sending-antenna. This ensures that the device is always sending with the maximum possible signal strength.


Especially old analogue 1-antenna devices offer massively less support than digital 3-antenna devices in the search phase. Less known is the fact that you can also be found worse with several old devices!

Avalanche transceivers don't send equally! The transmission characteristics (such as frequency, period, and pulse duration) of many old devices lay at the limit of the standard or even outside! Changes of the transmission characteristics can occur because of temperature unstable individual components. All these devices, send in adittion to the puls signal a continuous carrier signal, which makes it difficult to detect signal and signal processing.

If producers of beacons wouldn't have to take care of old devices, the performance of modern avalanche transceiver could be increased.


Don't use analogue 1-antenna-devices and invest in your safety and buy a modern avalanche transceiver!