Noyes OFL 100 Mini-OTDR, Руководство по эксплуатации

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{MENU} [ < XXXm ]
SETUP LOCATE
Should the display show less than 9 blocks in models HR and
LR or 8 blocks in MM models, then the front panel connection
may be contaminated and should be checked. If after cleaning,
there are still less than the specified number of blocks showing
then there may be an event of excessive loss near the launch
such as a break in the fiber or a poor splice.
If the display indicates < 50 m for MM models, < 100 m for HR
models, or < 1000 m for LR models , as shown above as
<XXXm, the unit is not seeing any fiber beyond these specified
lengths. This could indicate a poor launch condition or fiber
break within 50, 100 or 1000 meters of the specified unit.
The OFL 100 will still measure the fiber end on lengths less
than 50, 100 or 1000 meters respectively, but will not give an
indication of front end connection quality.
The OFL 100MM and HR models will measure distances as
short as 10 meters (reflective). The OFL 100LR models will
measure distances as short as 50 meters (reflective).
3.3 Verifying Test Conditions
Before making any measurements you should prepare a jumper
cable by inspecting and cleaning the fiber ends. Connect the
OFL 100 to the fiber under test with the jumper cable.
3.3.1 HR, LR and MM Models
The number of blocks displayed in the main menu, as shown
below, indicates the quality of the launch condition or connection
to the system. For the greatest range, the display bar graph
should show ten blocks, each block representing approximately
1 dB of operating range.
The OFL 100 will still measure fiber when there are fewer blocks
but its range will be significantly shortened.
Alternately the display will read:
[MENU] [ ]
SETUP [ac] LOCATE