AFL FLX380 Snelle referentiehandleiding - Pagina 6
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Test Settings: FTTx PON OTDR Test Mode
Setup
Parameter
Wavelength User selects single or multiple wavelength(s) at which to test.
Range
Not applicable: automatic.
Test
If set to [Customer Fiber Only], tests only
to splitter.
If set to [Through Splitter], tests customer
and feeder fiber.
PON
Not applicable if [Test] parameter is set to
[Customer Fiber Only] option.
If [Test] is set to [Through Splitter], user
sets PON split ratio.
Range: When setting manually, select
[Range], which is at least 20% longer than
the fiber under test.
Pulse width [Pulse]: If testing through
splitter, pulse width is set automatically
based on [Range] and [PON] split ratio.
If testing customer drop fiber only (In
Service), automatically set based on range
to splitter.
FTTx PON OTDR Test Mode
In Service
When testing through a splitter, user can
force a wider pulse width to improve trace
quality by selecting a longer [Range] or
higher [PON] split ratio.
Averaging Time: Also set automatically.
Resolution: Since PONs are usually short,
resolution is always set to high (close data
spacing) for more precise event location.
6
PON Construction
User sets OTDR scan range.
Not applicable: always
tests to user-set range.
User sets PON split ratio.