Codan-radio Radio Repeater Systems Training Guide Manual de usuario descargar pdf (Pagina 55)

RADIO REPEATER SYSTEM | TRAINING GUIDE

Appendix D: Calculating Signal Levels Page 47

PATH CALCULATION WORKSHEET

Terminal 1 BRIDGE ARS

Terminal 2 OFFICE

Transmitter power 4.0 watts(W) = 10(log W) = +6.0 dBW

Cable, ﬁ lter and connector loss (-0.9, -1.5, -1.0) -3.4 dB

Antenna input power +2.6 dBW

Antenna gain +6.0 dB

Effective radiated power +8.6 dBW

Propagation calculations:

Free space loss -89.0 dB

Shadow loss:

Obstruction 1 -35.0 dB

Obstruction 2 dB

Obstruction 3 dB

Other losses dB

Total -124 dB -124.0 dB

Received signal strength -115.4 dBW

Antenna gain +6.0 dB

Cable, ﬁ lter, and connector loss (-1.4, -0.5) -1.9 dB

Receiver input signal S = -111.3 dBW

Effective receiver threshold T = -137 dBW

Difference between S and T (Useful fade margin) 25.7 dB

Signal level: Anti log(fade margin/20) = 19.3 (μV) microvolts

1 2 ... 50 51 52 53 54 55 56 57 58 59 60 ... 87 88

Sin comentarios

Codan-radio Radio Repeater Systems Training Guide Manual de usuario Pagina 55