Appendix A: Application Note; Automatic Measurement Of The Optical Attenuation For A Fibre Network At Wavelengths: Λ=1310 Nm, Λ=1490 Nm And Λ=1550 Nm To Certificate According Telecommunication Normatives; Measuring The Reference Power - Promax PROLITE-105 Manuel D'utilisation

USER'S MANUAL. PROLITE-105
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APPENDIX A: APPLICATION NOTE

6.1 Automatic Measurement of the optical attenuation for a fibre network
at wavelengths: λ=1310 nm, λ=1490 nm and λ=1550 nm to certificate
according telecommunication normatives.
Next it is described the procedure to take attenuation measurements for an optical
communications network at the wavelengths of 1310 nm, 1490 nm and 1550 nm by
using the PROLITE-67 and the automatic mode of the PROLITE-105.
The attenuation or losses in a cable or optical device corresponds to the
difference between the input coupled power and the output obtained power.

6.2 Measuring the reference power

Before initiating the network attenuation measurement process, it is advisable
to register first the power measurement generated by the light source in combination
with a PROLITE-67 and saving them in the memory. By this way when measuring
later the attenuation of the optical network, the PROLITE-67 will indicate directly the
value of the attenuation.
Next, the procedure is described (see figure 3).
•
Connect the light source to the power level meter by means of an optical fibre
patch cord.
•
Configure the PROLITE-67 to measure only at the wavelengths: 1310nm,
1490 nm and 1550nm, by means of the function ATTENUATION TEST (see
that section on the PROLITE-67 user's manual).
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Figure 3.- Measurement of the reference power.
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