I only use OTDR, OPM, Illuminant 1310/1550 and VFL. It works very well and is easy to use. It's also very good value considering the price. The only reason I gave it 4 stars instead of 5 is because the product description says it can measure insertion loss, but you need a separate light source or power meter. This device cannot have a light source and an OPM at the same time, which I find easy to implement in its software.
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