Observed signal levels:
Standard deviations of individual measurements
Insertion loss 0.2587 dB
Standard deviation on insertion loss 0.00096
Error limits (3 sigma) +/- 0.00096 dB
This is a repeated measurement. The first one
had a standard deviation that was much larger than normal.
The result on the insertion loss was nearly indentical
which was probably a coincidence, one would expect
a discrepancy that would have been about 10 times larger.
The evaluation of the first measurement is included below.