Exfo FTB-7000 OTDR for FTB-200 v2 Manual de usuario descargar pdf (Pagina 46)

100

101

Preparing Your OTDR for a Test

32 FTB-7000 Series

Launch Conditions for Multimode Measurements

The table below gives information about tests with the 50 μm and 62.5 μm

fibers.

Fiber type Recommended mode filter Remarks

50 μm Perform a five-turn

mandrel-wrap (wrapping the

patchcord a minimum of five

turns around the mandrel tool)

on the patchcord connecting

the OTDR to the fiber under

test.

As per FOTP-34:

³ For fibers with 3 mm

jacket: use a mandrel tool

with a diameter of 25 mm.

³ For fibers without jacket:

use a mandrel tool with a

diameter of 22 mm.

Nominal launch conditions are

overfilled.

Loss measurements can be

slightly pessimistic (higher loss)

when compared to loss

measurements done with a

50 MMF source compliant to

FOTP34, Method A2.

62.5 μm No mode filter required. Loss measurements similar to

those obtained with a power

meter and a source that is

conditioned according to

FOTP34, Method A2.

IMPORTANT

If you test with 50 μm fibers, EXFO recommends that you use a

mode filter (mandrel-wrap). Otherwise, you may obtain results with

a 0.1 to 0.3 dB excess loss.

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 338 339

Comentarios a estos manuales

Sin comentarios

Exfo FTB-7000 OTDR for FTB-200 v2 Manual de usuario Pagina 46

Comentarios a estos manuales

Relacionado con productos y manuales para Instrumentos de medición Exfo FTB-7000 OTDR for FTB-200 v2