ZBM MINI OTDR - VFL Function

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8. OPM
This function is used to test the power of optical signal and insertion loss of various devices and
optoelectronic components. It can identify and measure the frequency of 270/3301k/2kHz frequency
optical signal.
9. VFL Function
Connect fiber to VFL port, select VFL in menu, then you could see optical light(650nm) in breakpoint or fiber
end-face.
Note: Do not see the light directly with your eyes! It is harmful to your eyes.
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