5. Radio Path StudyWireless Network Propagation/Path Profile
Analysis
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Scandia, MN Profile
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Performed For:
Automatic Systems Company
2400 West County Road D
St Paul, Minnesota 55112
Analysis By:
Larson Data Communications
GE MDS Full Service Partner
for IA, MN, MT, ND, NE, SD& WY
Scandia Network Overview
45° 12'
14'
45° 16'
92° 54'52'50'48'92° 46'
FIRE STATION
BLISS
ANDERSON
REPEATER
Scandia Network Overview with Terrain Data
45° 12'
14'
45° 16'
92° 54'52'50'48'92° 46'
FIRE STATION
BLISS
ANDERSON
REPEATER
Scandia Network Overview with 3D Links & Terrain Data –Looking Northwest
Scandia Network Overview with 3D Links & Terrain Data –Looking Northeast
December 10, 2014
Scandia, MN Network Analysis Page 6 of 17
Fire Station to Repeater Terrain Profile
FIRE STATION
Latitude 45 15 25.66 N
Longitude 092 47 58.98 W
Azimuth 204.71°
Elevation 1050 ft ASL
Antenna CL 30.0 ft AGL
REPEATER
Latitude 45 12 50.36 N
Longitude 092 49 40.06 W
Azimuth 24.69°
Elevation 983 ft ASL
Antenna CL 30.0 ft AGL
Frequency (MHz) = 915.0
K = 1.33
%F1 = 60.00
Path length (3.28 mi)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8 3.0 3.2
El
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a
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n
(
f
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960
980
1000
1020
1040
1060
1080
1100
December 10, 2014
Scandia, MN Network Analysis Page 7 of 17
Fire Station to Repeater Link Summary
FIRE STATION REPEATER
Latitude 45 15 25.66 N 45 12 50.36 N
Longitude 092 47 58.98 W 092 49 40.06 W
True azimuth (°)204.71 24.69
Vertical angle (°)-0.24 0.20
Elevation (ft)1049.87 983.32
Antenna model BCD-87010 (TR)BCD-87010 (TR)
Antenna gain (dBi)12.15 12.15
Antenna height (ft)30.00 30.00
TX line model LDF4-50A LDF4-50A
TX line unit loss (dB/100 ft)2.23 2.23
TX line length (ft)40.00 40.00
TX line loss (dB)0.89 0.89
Connector loss (dB)0.20 0.20
Miscellaneous loss (dB)0.40 0.40
Frequency (MHz)915.00
Polarization Vertical
Path length (mi)3.28
Free space loss (dB)106.14
Diffraction loss 20.18
Net path loss (dB)105.03 105.03
Radio model TransNet 900 TransNet 900
TX power (dBm)25.00 25.00
EIRP (dBm)35.66 35.66
RX threshold criteria 1x10^-6 BER 1x10^-6 BER
RX threshold level (dBm)-106.00 -106.00
Receive signal (dBm)-80.03 -80.03
Thermal fade margin (dB)25.97 25.97
Worst month multipath availability (%)99.99998 99.99998
Worst month multipath unavailability (sec)0.54 0.54
Annual multipath availability (%)100.00000 100.00000
Annual multipath unavailability (sec)1.13 1.13
December 10, 2014
Scandia, MN Network Analysis Page 8 of 17
Obstruction Loss vs. Antenna Height Analysis
Repeater @ 30’ /Fire Station @ 15’-100’
Di
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a
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Site 1 antenna height (ft)
105.010.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 952
4
6
8
10
12
14
16
18
20
22
24
26
Variable parameter -Site 1 antenna height
Site 1 start antenna height (ft)15
Site 1 end antenna height (ft)100
Site 2 antenna height (ft)30
Earth radius factor K 1.33
Frequency (MHz)915
Number of points 350
December 10, 2014
Scandia, MN Network Analysis Page 9 of 17
Obstruction Loss vs. Antenna Height Analysis
Fire Station @ 30’ / Repeater @ 15’-100’
Di
f
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a
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Site 2 antenna height (ft)
105.010.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 956
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Variable parameter -Site 2 antenna height
Site 2 start antenna height (ft)15
Site 2 end antenna height (ft)100
Site 1 antenna height (ft)30
Earth radius factor K 1.33
Frequency (MHz)915
Number of points 350
December 10, 2014
Scandia, MN Network Analysis Page 10 of 17
Repeater to Anderson Terrain Profile
REPEATER
Latitude 45 12 50.36 N
Longitude 092 49 40.06 W
Azimuth 251.75°
Elevation 983 ft ASL
Antenna CL 30.0 ft AGL
ANDERSON
Latitude 45 12 49.53 N
Longitude 092 49 43.62 W
Azimuth 71.74°
Elevation 950 ft ASL
Antenna CL 10.0 ft AGL
Frequency (MHz) = 915.0
K = 1.33
%F1 = 60.00
Path length (0.05 mi)
0 0.005 0.010 0.015 0.020 0.025 0.030 0.035 0.040 0.045
El
e
v
a
t
i
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n
(
f
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940
960
980
1000
1020
1040
1060
December 10, 2014
Scandia, MN Network Analysis Page 11 of 17
Repeater to Anderson Link Summary
REPEATER ANDERSON
Latitude 45 12 50.36 N 45 12 49.53 N
Longitude 092 49 40.06 W 092 49 43.62 W
True azimuth (°)251.75 71.74
Vertical angle (°)-11.22 11.22
Elevation (ft)983.32 950.07
Antenna model BCD-87010 (TR)RY-900B (TR)
Antenna gain (dBi)12.15 12.15
Antenna height (ft)30.00 10.00
TX line model LDF4-50A LDF4-50A
TX line unit loss (dB/100 ft)2.23 2.23
TX line length (ft)40.00 20.00
TX line loss (dB)0.89 0.45
Connector loss (dB)0.20 0.20
Miscellaneous loss (dB)0.40 0.40
Frequency (MHz)915.00
Polarization Vertical
Path length (mi)0.05
Free space loss (dB)70.12
Diffraction loss 51.49
Net path loss (dB)99.85 99.85
Radio model TransNet 900 TransNet 900
TX power (dBm)25.00 25.00
EIRP (dBm)35.66 36.10
RX threshold criteria 1x10^-6 BER 1x10^-6 BER
RX threshold level (dBm)-106.00 -106.00
Receive signal (dBm)-74.85 -74.85
Thermal fade margin (dB)31.15 31.15
Worst month multipath availability (%)100.00000 100.00000
Worst month multipath unavailability (sec)0.00 0.00
Annual multipath availability (%)100.00000 100.00000
Annual multipath unavailability (sec)0.00 0.00
December 10, 2014
Scandia, MN Network Analysis Page 12 of 17
Obstruction Loss vs. Antenna Height Analysis
Anderson @ 10’ /Repeater @ 15’-100’
Di
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Site 1 antenna height (ft)
105.010.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 9538
40
42
44
46
48
50
52
54
56
58
60
62
64
66
68
70
72
74
Variable parameter -Site 1 antenna height
Site 1 start antenna height (ft)15
Site 1 end antenna height (ft)100
Site 2 antenna height (ft)10
Earth radius factor K 1.33
Frequency (MHz)915
Number of points 350
December 10, 2014
Scandia, MN Network Analysis Page 13 of 17
Obstruction Loss vs. Antenna Height Analysis
Repeater @ 30’ /Anderson @ 10’-100’
Di
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a
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t
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l
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Site 2 antenna height (ft)
105.05.0 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 956
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
50
Variable parameter -Site 2 antenna height
Site 2 start antenna height (ft)10
Site 2 end antenna height (ft)100
Site 1 antenna height (ft)30
Earth radius factor K 1.33
Frequency (MHz)915
Number of points 350
December 10, 2014
Scandia, MN Network Analysis Page 14 of 17
Repeater to Bliss Terrain Profile
REPEATER
Latitude 45 12 50.36 N
Longitude 092 49 40.06 W
Azimuth 283.84°
Elevation 983 ft ASL
Antenna CL 30.0 ft AGL
BLISS
Latitude 45 13 25.86 N
Longitude 092 53 04.28 W
Azimuth 103.80°
Elevation 974 ft ASL
Antenna CL 30.0 ft AGL
Frequency (MHz) = 915.0
K = 1.33
%F1 = 60.00
Path length (2.85 mi)
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 2.2 2.4 2.6 2.8
El
e
v
a
t
i
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n
(
f
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920
940
960
980
1000
1020
1040
December 10, 2014
Scandia, MN Network Analysis Page 15 of 17
Repeater to Bliss Link Summary
REPEATER BLISS
Latitude 45 12 50.36 N 45 13 25.86 N
Longitude 092 49 40.06 W 092 53 04.28 W
True azimuth (°)283.84 103.80
Vertical angle (°)-0.05 0.02
Elevation (ft)983.32 974.41
Antenna model BCD-87010 (TR)RY-900B (TR)
Antenna gain (dBi)12.15 12.15
Antenna height (ft)30.00 30.00
TX line model LDF4-50A LDF4-50A
TX line unit loss (dB/100 ft)2.23 2.23
TX line length (ft)40.00 40.00
TX line loss (dB)0.89 0.89
Connector loss (dB)0.20 0.20
Miscellaneous loss (dB)0.40 0.40
Frequency (MHz)915.00
Polarization Vertical
Path length (mi)2.85
Free space loss (dB)104.93
Diffraction loss 24.58
Net path loss (dB)108.22 108.22
Radio model TransNet 900 TransNet 900
TX power (dBm)25.00 25.00
EIRP (dBm)35.66 35.66
RX threshold criteria 1x10^-6 BER 1x10^-6 BER
RX threshold level (dBm)-106.00 -106.00
Receive signal (dBm)-83.22 -83.22
Thermal fade margin (dB)22.78 22.78
Worst month multipath availability (%)99.99997 99.99997
Worst month multipath unavailability (sec)0.73 0.73
Annual multipath availability (%)100.00000 100.00000
Annual multipath unavailability (sec)1.54 1.54
December 10, 2014
Scandia, MN Network Analysis Page 16 of 17
Obstruction Loss vs. Antenna Height Analysis
Bliss @ 30’ /Repeater @ 15’-100’
Di
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a
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t
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l
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Site 1 antenna height (ft)
105.010.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 956
8
10
12
14
16
18
20
22
24
26
28
Variable parameter -Site 1 antenna height
Site 1 start antenna height (ft)15
Site 1 end antenna height (ft)100
Site 2 antenna height (ft)30
Earth radius factor K 1.33
Frequency (MHz)915
Number of points 350
December 10, 2014
Scandia, MN Network Analysis Page 17 of 17
Obstruction Loss vs. Antenna Height Analysis
Repeater @ 30’ /Bliss @ 15’-100’
Di
f
f
r
a
c
t
i
o
n
l
o
s
s
Site 2 antenna height (ft)
105.010.0 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 9515
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
Variable parameter -Site 2 antenna height
Site 2 start antenna height (ft)15
Site 2 end antenna height (ft)100
Site 1 antenna height (ft)30
Earth radius factor K 1.33
Frequency (MHz)915
Number of points 350