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Use 13% instead of the default 10% when the nRF RTC timer is used so that the allowed drift is at least one tick long (~122 us in this case). Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>
# Test a timer implementations variance and long term drift Records and calculates statistical values against a timer validating that. 1. Timer variance and standard deviation is below defined acceptable values. 2. Periodic timers do not drift in either direction from expected total time. Timers are meant to be precise and accurate. This test validates an implementation is both.