Codan-radio Radio Repeater Systems Training Guide Manuel d'utilisateur télécharger pdf (Page 79)

RADIO REPEATER SYSTEM | TRAINING GUIDE

Appendix I: Blank Worksheets Page 71

PATH CALCULATION WORKSHEET

Terminal 1

Terminal 2

Transmitter power watts(W) = 10(log W) = dBW

Cable, ﬁ lter and connector loss dB

Antenna input power dBW

Antenna gain dB

Effective radiated power dBW

Propagation calculations:

Free space loss dB

Shadow loss:

Obstruction 1 dB

Obstruction 2 dB

Obstruction 3 dB

Other losses dB

Total dB dB

Received signal strength dBW

Antenna gain dB

Cable, ﬁ lter, and connector loss dB

Receiver input signal S = dBW

Effective receiver threshold T = dBW

Difference between S and T (Useful fade margin) dB

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

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Codan-radio Radio Repeater Systems Training Guide Manuel d'utilisateur Page 79