Operation Manual

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3-94
３
(Example)
Assuming that the maximum range of the initial PM pattern is rBmax = 18 NM according to the
INFORMATION LABEL, and if that of the current PM pattern is rAmax = 16 NM, the deterioration
value is ∆R (rmax) = 5dB, referring to Calibration Curve II.
This means that the receiver system has sensitivity deterioration of approximately 5dB.
Example of Checking Receiver System
Figure 4
Calibration curve II
Sensitivity deterioration value R(rmax)
PM pattern maximum range (rmax)
Initial PM
pattern
8-18NM
Current PM
pattern
16-18NM