OLT-85/OLT-85P
41
6 L
OSS
T
EST
O
PERATION
S
WITCHING
ON
/
OFF
THE
LASER
Each of the above factors has a loss associated with it.
Remembering that standards and requirements vary, here are
the generic Telecommunications Industry Association (TIA)
maximums:
• 3.5 dB/km at 850 nm
• 1.5 dB/km at 1300 nm
• 1.0 dB/km at 1310 nm
• 1.0 dB/km at 1550 nm
• Loss per connection: 0.75 dB
• Loss per splice: 0.3 dB
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 (reference method must be considered) and splices
are present in the fiber system under test.
Starting the Pass/Fail indication
I
The limit for the
Pass/Fail
indication is set.
J
From the measurement display press the
[
A
]
key and tap
[
Pass/Fail
]
.
J
To switch back to numerical loss indication, press the
[
A
]
key
and tap the
[
dB
]
button.
Switching on/off the laser
I
The instrument is in
Loss Mode
.
J
To switch on the laser, tap the
[
Laser On/Off
]
field.
– or –
Press the center key within the arrow keys.
– or –
Press the
[
A
]
key and tap the
[
Laser on
]
button.
J
To switch off the laser, repeat one of the above mentioned
actions.
Performing the measurement
I
Laser is switched on.
J
Connect your fiber system under test as shown below.
