Measuring Loss - OPTOKON OFT-920 User Manual

9.4.2 Measuring Loss

1. Do not disconnect the master cord from the first instrument.
2. Disconnect the master cord from the power meter port of the second
instrument.
3. Connect the trace to be measured between the master cord and the power
meter port of the second instrument.
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 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
the LIMIT- PASS, this means that this fiber complies with the set LIMIT and
ERR means that the fiber overreached the set LIMIT.
6. Value of loss can be stored into the O)".FT-920 internal memory by pushing
[MENU], [MEMORY]. [SAVE], [+,-]., [SAVE].
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OFT-920 USER MANUAL