OLTS-85
45
5 T
IER
1 L
OSS
T
EST
O
PERATION
P
ASS
/F
AIL
INDICATION
Pass/Fail indication
Pass/Fail indication for losses is only available in Tier 1 mode.
When performing fiber certification, the loss of the fiber system
under test must be measured and compared to a calculated loss
limit to provide a loss margin.
The calculated loss limit is the maximum allowable loss of the
overall system and is based on the following factors:
• Length of the fiber
• Number of connections
• Number of splices
Each of the above factors has a loss associated with it. To assist
your work, the standards and requirements for TIA 568.3,
ISO 11801, and ISO 14763-3 are already specified in the
instrument as preferences.
For loss limit calculation, associate the slope (loss per km) of
your fiber under test to your fiber length. For loss per
connection and splice, the technician must indicate how many
connections and splices are present in the fiber system under
test.
All connections to a reference cord are already considered by the
OLTS-85. So, for the number of connections, please count all
connections excluding the connections to a reference cord.
Pass indication
All measured losses are below or equal the calculated maximum
loss
AND
the measured length is shorter or equal to the set
length limit.
Fail indication:
One or more measured losses are above the calculated
maximum loss
OR/AND
the measured length is longer than the
set length limit.