The acceptable power level range for Set Reference with the MultiFiber Pro Singlemode Source is + 0.50 dBm to -3.00 dBm.
The reference values shown below are in the acceptable range:
Prior to setting reference, confirm the stability of the singlemode source by waiting 5 minutes and running the test again and looking for 0.00 dB or close to that for the loss measurement.
Here is the procedure for setting reference using MultiFiber Pro:
