Measuring Loss - OPTOKON OFT-920 User Manual

9.3.2 Measuring Loss

1. Do not disconnect the master cords from the instrument.
2. Disconnect one master cord from the other.
3. Connect the trace to be measured between the master cords.
4. Display of instrument (power meter) will report the negative numbers in dB
for appropriate fiber (A1, A2, B1, B2) or PASS/FAIL/OVERPOWER in the case
of measurement with set 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 the
setting LIMIT- PASS, this means that this fiber is complied with the set LIMIT
and ERR means that the fiber overreached set LIMIT.
6. Value of loss can be stored into the OFT-920 internal memory by pushing
[MENU], [MEMORY]. [SAVE], [+,-]., [SAVE].
(pic.4)
- 23 -
OFT-920 USER MANUAL