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Figure 7(c) shows the case of interference which can not be tolerated – i.e. the operation of the system is impaired. The power sum of all the interfering signals including the noise floor of the receiver results in an insufficient wanted signal margin -, i.e. the C/I ratio available at the receivers input is less than the S/N ratio required for the intended operation.
Figure 7: Levels used to determine whether or not interference is occurringAnchor F007 F007
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You can select the interfering modes (unwanted and blocking) as well as the interference criteria of your choice in SEAMCAT as shown in Figure 97.
Figure 8: Illustrative summary of the interference criteria computationAnchor F008 F008