NOYAFA NF-906A - Manual (Page 9)

3.3 Absolute power measurement
(1). Use one major bridle wire to connect the output port of light
source and the detecting port of fiber power meter as shown in
the following fig:
(2).Turn on the light source to enter working mode and select
wavelength to be tested.
(3).Turn on the fiber power meter and select specified wavelength.
(Selection method: press the key to select the desire
wavelength value)
(4).The current power value on screen is just the absolute power
value of current output of light source as shown in the following
Fig( the current value is -09.73dBm):
3.4 Relative power（LOSS）measurement
Relative power measurements are used to determine the power
loss between two points in the system.The power level is first
measured at one point and that value is saved in the meter as a
reference. The power is then measured at another point. The
meter subtracts the reference value from the new reading and
displays the difference in dB
NF-906 Fiber Power Meter Light Source
Your excellent helper in cable test! 07