Measuring Loss - OPTOKON OFT-920 User Manual

9.2.2 Measuring Loss

1. Do not disconnect the master cords from the instruments.
2. Disconnect both master cords.
3. Connect the trace to be measured between the master cords.
4. The display of the second instrument (power meter) will report the negative
numbers in dB for the appropriate fiber (A1, A2, B1, B2) or PASS/ERR in the
case of measurement with the setting LIMIT.
5. 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
LIMIT- PASS this means that this fiber is complied with the set LIMIT and ERR
means that fiber overreached the set LIMIT.
6. Value of loss is possible to store into the OFT-920 internal memory by pushing
[MENU], [MEMORY]. [SAVE], [+,-]., [SAVE].
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OFT-920 USER MANUAL