User manual

15
Part D – System Planning and Design
Examples of Predictive Path Modelling
Clear line of site
Radio path with good signal levels, attenuated only by
free space loss.
Obstructed Radio Path
This path has an obstruction that will seriously degrade
the signal arriving at the field site.
obstpath.pl3
Major Repeater Site
Field Site
Elevation (m)
703.83
309.67
Latitude
030 43 55.92 S
030 56 24.00 S
Longitude
150 38 49.51 E
150 38 48.00 E
Azimuth
180.10
0.10
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
TX Line Unit Loss (dB/100 m)
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)
23.04
Free Space Loss (dB)
112.78
Diffraction Loss (dB)
16.71
Net Path Loss (dB)
117.25
117.25
Radio Type Model
EB450
ER450
TX Power (watts)
5.00
1.00
TX Power (dBW)
6.99
0.00
Effective Radiated Power (watts)
6.71
4.63
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)
9.70
21.70
RX Signal (dBW)
-117.25
-110.26
RX Field Strength (uv/m)
95.74
115.23
Fade Margin (dB)
22.75
24.74
Raleigh Service Probability (%)
99.470
99.665
goodpath.pl3
Major Repeater Site
Field Site
Elevation (m)
756.69
309.67
Latitude
031 04 37.49 S
030 56 24.00 S
Longitude
150 57 26.34 E
150 38 48.00 E
Azimuth
297.05
117.21
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
TX Line Unit Loss (dB/100 m)
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)
33.33
Free Space Loss (dB)
115.99
Diffraction Loss (dB)
0.00
Net Path Loss (dB)
103.75
103.75
Radio Type Model
EB450
ER450
TX Power (watts)
5.00
1.00
TX Power (dBW)
6.99
0.00
Effective Radiated Power (watts)
6.71
4.63
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)
45.93
102.70
RX Signal (dBW)
-103.75
-96.76
RX Field Strength (uv/m)
453.14
545.42
Fade Margin (dB)
36.25
38.24
Raleigh Service Probability (%)
99.976
99.985