Viavi SmartClass Fiber OLTS-85 User Manual page 42

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5 T
1 L
T
O
IER
OSS
EST
PERATION
R
EFERENCING METHODS
Limit
= Length of fiber * Loss/km + L
14763-3
= 0.6 dB + Length of fiber * Loss/km (dB) + 0.75 dB + 0.75 dB +
Limit
= Length of fiber * Loss/km + L
TIA/11801
= Length of fiber * Loss/km (dB) + 0.75 dB + 0.75 dB + 0.3 dB
42
Three jumper reference method
The dual-ended reference removes the losses at Connection 1,
Connection 2, Connection 3, and Connection 4 from the
measurement.
Three jumper reference for single-mode fiber
Fig. 15 Three jumper reference: single-mode remote and single-mode
loopback
For more information on performing a measurement refer to
Fig.
18.
Reference connector to reference connector mated loss: 0.2 dB
Reference connector to random connector: ISO 14763-3: 0.5 dB,
TIA 568.3/ISO 11801: 0.75 dB
Random to random connector: 0.75 dB
Splice loss: 0.3 dB
L
L
+ L
conn4 +
splice5
conn6
0.3 dB
L
+ L
(0 dB)
splice5
conn6
(0.5 dB – 0.2 dB) + L
conn2
(0.5 dB – 0.2 dB)
(0 dB) + L
conn2
+
conn3
+ L
conn3
conn4 +
OLTS-85

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