When we have been asked by our partner from Canada to provide fully operational tests of RAy3 in temperature at –40 °C (–40 °F), our technical team was happy to pick up the challenge. They always like to push the limits.
Normally every single RAy unit must pass a comprehensive range of tests in climatic chamber from –30 to 55 °C (–22 to 131 °F) as part of our standard output control.
The tests start at ambient temperature with a throughput test where both, ETH and SFP interfaces are tested. Six minutes each, transmission with maximum speed (approx. 200 million packets, max. 100 packets can be lost).
The next test is a measurement on the narrowest channel, where the quality and stability of radio parameters like RSS, MSE, watch dog etc. are controlled.