In addition to screening out failed units, the Tagsurance is able to actually measure the lowest response power. The threshold power can be measured on multiple defined frequencies.
One measurement on a defined frequency with a maximum power range takes 41ms. The test duration can be further reduced by adjusting the resolution or the power range used in the measurement.
Often the interest is on the variance inside control limits, and the exact measured sensitivity of failed units is not significant. In this case, narrowing down the power range helps to minimize the test duration.