User's Manual

Page 14
M Series Data Radio – User Manual
© Copyright 2004 Trio DataCom Pty. Ltd.
Part D – System Planning and Design
Effect of Earth Curvature on Long Paths
This path requires greater mast height to offset the earth curvature
experienced at such a distance (73km).
longpath.pl3 Repeater Site Far Field Site
Elevation (m)
221.26 75.58
Latitude 032 01 21.63 S 032 33 00.00 S
Longitude 142 15 19.26 E 141 47 00.00 E
Azimuth
217.12 37.37
Antenna Type ANT450/6OM ANT450/9AL
Antenna Height (m)
40.00 5.00
Antenna Gain (dBi)
8.15 11.15
Antenna Gain (dBd)
6.00 9.00
TX Line Type LDF4-50 LDF4-50
TX Line Length (m)
40.00 5.00
6.79 6.79
TX Line Loss (dB)
2.72 0.34
Connector Loss (dB)
2.00 2.00
Frequency (MHz)
450.00
Path Length (km)
73.46
Free Space Loss (dB)
122.85
Diffraction Loss (dB)
22.94
Net Path Loss (dB)
133.55 133.55
Radio Type Model EB450 ER450
TX Power (watts)
5.00 1.00
TX Power (dBW)
6.99 0.00
Effective Radiated Power (watts)
6.72 4.64
Effective Radiated Power (dBW)
8.27 6.66
RX Sensitivity Level (uv)
0.71 1.26
RX Sensitivity Level (dBW) -140.00 -135.00
RX Signal (uv)
1.49 3.32
RX Signal (dBW) -133.55 -126.56
RX Field Strength (uv/m)
14.65 17.64
Fade Margin (dB)
6.45 8.44
Raleigh Service Probability (%)
79.735 86.656