AFL FlexTester 3 Manuel de référence rapide - Page 7

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Test Settings: FTTx PON OTDR Test Mode

Parameter

FTTx PON OTDR Test Mode

Wavelength User selects single or multiple wavelength(s) at which to test.

Range

Auto: Range, pulse width, resolution, averaging are automatically determined.

Distance settings: User manually selects setting in range 250 m to 240 km.

Test

If set to [Customer Fiber Only], tests only to the splitter using automatically determined

Range setting.

If set to [Through Splitter], tests through splitter including customer and feeder fibers using

selected automatic or manual range setting.

PON

Not present if [Test] parameter is set to [Customer Fiber Only] option. If [Test] is set to

[Through Splitter], user sets PON split ratio (1x8, 1x16, x132, 1x64, or 1x128).

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.

Resolution: Since PONs are usually short, resolution

is typically set to High (close data spacing) for more

precise event location.

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.