Measure Insertion Loss (2-Point And 5-Point Method) - ADInstruments AD1000 User Manual

12.3 Measure Insertion Loss (2-point and 5-point
method)
Insertion loss (unit: dB) is calculated by measuring the signal level of Rayleigh
backscatter (RBS) and the magnitude of reduction. Insertion loss can be created by
reflection and non-reflection events.
System calculates real timely the loss between Marker A and B, and also calculates
the insertion loss at Marker A or B. Insertion loss is calculated in 5-point method.
2-point method (A-B Loss):
Insertion loss is calculated as shown in Fig. 12.2.
2-point method is suitable for measuring splice loss but not applicable to measuring
reflection events.
u "A-B Loss" is for quick loss measurement of certain segment of the fiber
marked between Marker A and B.
u ""A-B Loss" is not applicable to me applicable to measuring reflection
events.
Insertion Loss
Fig 12.2 2-point Loss
AD1000 User's Manual
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