Broadcast Tools SS 2.1/Terminal III Manual de usuario descargar pdf (Pagina 147)

Appendix A: Path Evaluation Information A-11

Moseley SL9003Q 602-12016 Revision G

Over a year, the fade probability due to climate is given by:

ryr = b x rm

Where,

b (climate factor)

= 1/2 for Gulf coast or similar hot, humid areas.

= 1/4 for normal interior temperate or northern regions.

= 1/8 for mountainous or very dry areas.

By combining the three equations and noting that Undp is equal to the actual fade probability,

for a given fade margin F, we can write:

ndp

= ryr x 10-F/10 = b x rm x 10-F/10

ndp

= a x b x 2.5 x 10-6 x f x 10D3 x 10-F/10

See Table A-6 for the relationship between system reliability and outage time.

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Broadcast Tools SS 2.1/Terminal III Manual de usuario Pagina 147