Codan-radio Radio Repeater Systems Training Guide Manual de usuario descargar pdf (Pagina 56)

TRAINING GUIDE | RADIO REPEATER SYSTEM

Appendix D: Calculating Signal LevelsPage 48

PATH CALCULATION WORKSHEET

Terminal 1 BRIDGE ARS

Terminal 2 IRON MTN. ARS

Transmitter power 0.5 watts(W) = 10(log W) = -3.0 dBW

Cable, ﬁ lter and connector loss (-1.2, -1.2, -2.0) -4.4 dB

Antenna input power +7.4 dBW

Antenna gain +10.0 dB

Effective radiated power +2.6 dBW

Propagation calculations:

Free space loss -118.0 dB

Shadow loss:

Obstruction 1 dB

Obstruction 2 dB

Obstruction 3 dB

Other losses dB

Total -118 dB -118.0 dB

Received signal strength -115.4 dBW

Antenna gain +10.0 dB

Cable, ﬁ lter, and connector loss (-1.2, -1.2, -2.0) -4.4 dB

Receiver input signal S = -109.8 dBW

Effective receiver threshold T = -137 dBW

Difference between S and T (Useful fade margin) 27.2 dB

Signal level: Anti log(fade margin/20) = 22.9 (μV) microvolts

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Codan-radio Radio Repeater Systems Training Guide Manual de usuario Pagina 56