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MyLaps update killing MRT, AMBrc DP and house transponders!

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MyLaps update killing MRT, AMBrc DP and house transponders!

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Old 06-04-2018, 05:22 AM
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These lap counting systems use frequencies many orders of magnitude lower than Bluetooth. That's because the reception of the transponder signal is intentionally done in the near field, via induction. The signals are strong only very close to the receiving loop, and die out quickly as distance is increased. That makes it relatively simple to determine when the transponder is passing under or over the receiving loop.

At higher frequencies, reflections can cause signal strength to peak even when the distance between transmitter and receiver is not at a minimum. That would cause false lap timing.
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