If you get the following message;
"Check fiber connections. The measured power levels are outside the range expected for setting a reference.", then your Test Reference Cords are either bad/dirty or the ports on the DTX-SFM2 modules are dirty/bad. A simple inspection using the FiberInspector™ Mini will reveal the issue.
This warning will appear when the reference values fall outside of the following ranges:
Smart Remote Mode
DTX-SFM2: -4,5 dBm a -10,0 dBm