Appendix A: Application Note - Promax PROLITE-65 Manual De Instrucciones

USER'S MANUAL PROLITE-65

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.
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-65 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.
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-65 and saving them in the memory. By this way when measuring
later the attenuation of the optical network, the PROLITE-65 will indicate directly the
value of the attenuation.
Next, the procedure is described (see figure below).
Figure 25.- Measurement of the reference power.
•
Connect the light source to the power level meter by means of an optical fibre
patch cord.
•
Configure the PROLITE-65 to measure only at the wavelengths: 1310 nm,
1490 nm and 1550 nm, by means of the function ATTENUATION TEST (see
that section on the PROLITE-65 user's manual).
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