Measuring Loss - OPTOKON OFT-920 User Manual

9.5.2 Measuring Loss

1. Do not disconnect the master cord from the light source port.
2. Connect the trace to be measured between the power meter port and the
master cord that is attached to the light source.
3. The display of the instrument (power meter) will report negative numbers in
dB for the appropriate fiber (A1, A2, B1, B2) or PASS/FAIL/OVERPOWER in the
case of a measurement with setting the LIMIT.
4. This number represents a power drop, therefore loss of the tested link is
defined as: "loss = – (power drop)". In the case of measurement with setting
the LIMIT- PASS, this means that this fiber is complied with the set LIMIT and
ERR means that the fiber overreached set LIMIT.
5. Value of loss can be stored into the OFT-920 internal memory by pushing
[MENU], [MEMORY]. [SAVE], [+,-]., [SAVE].
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OFT-920 USER MANUAL