Dear Heitor !
There is also some strange behavior u will find in the BER analyzer, which i have explained below. Have a look at this.
when i sweep between 0.5 to 3 km distance of optical fiber then BER analyzer showed graphs for some values of distance and does not show any graph for some of the values.
i dont know y this happing ?
If u know why this is happing kindly share with me also.
Best Regards