Codan Radio Radio Repeater Systems Training Guide - Manual (Page 56)

TRAINING GUIDE | RADIO REPEATER SYSTEM
Appendix D: Calculating Signal Levels Page 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