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(5) Splice Loss
This series of OTDR mainly use four-point marking method:
Measurements are performed at four points: starting point A, starting
point B, ending point C and ending point D. The weld loss is calculated
by the level difference of the mark B of the approximate line between B-A
and C-D. Please set mark B in the correct position. The weld loss depends
largely on the location of B. The measured loss between tags depends on
the approximation method specified.
(6) Return Loss (RL)
RL is the ratio of reflected light Pr to incident light Pi in dB. Using the formula RL=-10log (Pr/Pi), the
greater the echo loss, the smaller the reflected light energy, indicating that the better the measured light path.
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