Promax PROLITE-63, Manual

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Press SEL or CONFIG to get into this function (see figure below).
Figure 4. OPTICAL POWER METER.
Next are described each one of the fields on screen:
Wavelenght at which it is measuring. Available wavelenght are 1310, 1490,
1550 and 1625 nm.
Reference value from which is calculated the relative losses. Reference
value can be changed.
Modulation frequency.
Graphical representation of the power.
Selected threshold group of values. Threshold values are grouped and
saved on the memory of the instrument, then later they can be selected in
order to the quality criterium to meet.
Lower threshold value.
Maximal power value recommended for the selected wavelenght.
Upper threshold value.
Signal status with respect to threshold values. Three status are possible:
LOW, PASS, HIGH.
Relative signal losses (attenuattion) at the selected wavelenght. It is in dB.
It is equal to:
ATTEN = Ref (dBm) - POT (dBm)
8 January 2014