bos1234
2013-02-22, 07:38 AM
Hi
I'm new to pathloss 4.0. My job is to use existing pathloss files and compare availabilities of different radio vendors (eg. marconi, ceragon etc).
The below report is an existing pl file.
117km link
3.7m antenna diamater (main & diversity)
Antenna - Andrew Antennas
Radio - Moseley
Propogation model (reliability method) : ITU-R P.530-12
Space diversity Improvement factor only 2.45 dB
These are my calculations(see attachment - mycalculation_Marconi"). I have changed the frequency,waveguide, radio equipment and the antenna diamaters. I am getting very good availability even though the frequency is higher and the diameter of the antenna is smaller. This is due to the space diversity improvement factor which is 35dB.
Are the calculations correct? What factors effect space diversity improvement factor? Is there a formula to use?
edit: If you cannot open the files I have included them below
edit2: I have found that selecting regional standards differes availability. How to choose between North America-dispersive fade margin or ITU-Rp.530 strict equipment signature
EXISTING PATHLOSS FILE
C2A Kaimbia
Elevation (m) 1001.85 65.78
Latitude 09 06 19.14 S 09 26 21.25 S
Longitude 160 58 13.24 E 159 57 03.63 E
True azimuth (°) 251.67 71.83
Vertical angle (°) -0.85 0.05
Antenna model HPX12-36 HPX12-36
Antenna height (m) 30.00 40.00
Antenna gain (dBi) 40.60 40.60
Radome loss (dB) 0.20 0.20
TX line type EWP37 EWP37
TX line length (m) 40.00 50.00
TX line unit loss (dB /100 m) 2.91 2.91
TX line loss (dB) 1.16 1.46
Connector loss (dB) 0.20 0.20
Other TX loss (dB) 2.50 2.50
Antenna model HPX12-36 HPX12-36
Antenna height (m) 20.00 30.00
Antenna gain (dBi) 40.60 40.60
Radome loss (dB) 0.20 0.20
TX line type EWP37 EWP37
TX line length (m) 30.00 40.00
TX line unit loss (dB /100 m) 2.91 2.91
TX line loss (dB) 0.87 1.16
Connector loss (dB) 0.20 0.20
Frequency (MHz) 3800.00
Polarization Vertical
Path length (km) 117.93
Free space loss (dB) 145.50
Atmospheric absorption loss (dB) 0.82
Field margin (dB) 1.00
Diffraction loss (dB) 0.00
Main net path loss (dB) 72.03 72.03
Diversity net path loss (dB) 71.74 71.74
Radio model 3.8GHz 3.8GHz
TX power (watts) 2.00 2.00
TX power (dBm) 33.00 33.00
EIRP (dBm) 69.54 69.25
Emission designator 40M0D7W 40M0D7W
RX threshold criteria BER 10-6 BER 10-6
RX threshold level (dBm) -67.00 -67.00
Maximum receive signal (dBm) -20.00 -20.00
Main RX signal (dBm) -39.03 -39.03
Diversity RX signal (dBm) -38.74 -38.74
Thermal fade margin (dB) 28.26 28.26
Geoclimatic factor 2.16E-05
Path inclination (mr) 7.85
Fade occurrence factor (Po) 1.19E-01
Average annual temperature (°C) 27.00
SD improvement factor 2.45 2.45
Worst month - multipath (%) 99.99272 99.99272
(sec) 191.45 191.45
Annual - multipath (%) 99.99727 99.99727
(sec) 861.51 861.51
(% - sec) 99.99454 - 1723.03
Rain region ITU Region N
Flat fade margin - rain (dB) 28.26
Annual multipath + rain (%-sec) 99.99454 - 1723.03
My calculation
C2A Kaimbia
Elevation (m) 1001.85 65.78
Latitude 09 06 19.14 S 09 26 21.25 S
Longitude 160 58 13.24 E 159 57 03.63 E
True azimuth (°) 251.67 71.83
Vertical angle (°) -0.85 0.05
Antenna model HSX6-44B HSX6-44B
Antenna height (m) 30.00 40.00
Antenna gain (dBi) 36.30 36.30
Radome loss (dB) 0.20 0.20
TX line type EWP43 EWP43
TX line length (m) 40.00 50.00
TX line unit loss (dB /100 m) 2.90 2.90
TX line loss (dB) 1.16 1.45
Connector loss (dB) 0.20 0.20
Other TX loss (dB) 2.50 2.50
Antenna model HSX6-44B HSX6-44B
Antenna height (m) 20.00 30.00
Antenna gain (dBi) 36.30 36.30
Radome loss (dB) 0.20 0.20
TX line type EWP43 EWP43
TX line length (m) 30.00 40.00
TX line unit loss (dB /100 m) 2.90 2.90
TX line loss (dB) 0.87 1.16
Connector loss (dB) 0.20 0.20
Frequency (MHz) 4400.00
Polarization Vertical
Path length (km) 117.93
Free space loss (dB) 146.77
Atmospheric absorption loss (dB) 0.86
Field margin (dB) 1.00
Diffraction loss (dB) 0.00
Main net path loss (dB) 81.94 81.94
Diversity net path loss (dB) 81.65 81.65
Radio model MDRS155/4700-128MLCM EC MDRS155/4700-128MLCM EC
TX power (watts) 1.00 1.00
TX power (dBm) 30.00 30.00
EIRP (dBm) 62.24 61.95
Emission designator 26M0D7W 26M0D7W
RX threshold criteria BER 10-6 BER 10-6
RX threshold level (dBm) -72.00 -72.00
Maximum receive signal (dBm) -20.00 -20.00
Main RX signal (dBm) -51.94 -51.94
Diversity RX signal (dBm) -51.65 -51.65
Thermal fade margin (dB) 20.35 20.35
Geoclimatic factor 2.16E-05
Path inclination (mr) 7.85
Fade occurrence factor (Po) 1.25E-01
Average annual temperature (°C) 27.00
SD improvement factor 35.04 35.04
Worst month - multipath (%) 99.99619 99.99619
(sec) 100.02 100.02
Annual - multipath (%) 99.99857 99.99857
(sec) 450.11 450.11
(% - sec) 99.99715 - 900.22
Rain region ITU Region N
Flat fade margin - rain (dB) 20.35
Annual multipath + rain (%-sec) 99.99715 - 900.22
Fri, Feb 22 2013
1b_Kaimbia-C2A-4.4GHz-1.8m-117km.pl4
Reliability Method - ITU-R P.530-12
Space Diversity Method ITU-R P.530-12 IF Combining
Rain - Crane
I'm new to pathloss 4.0. My job is to use existing pathloss files and compare availabilities of different radio vendors (eg. marconi, ceragon etc).
The below report is an existing pl file.
117km link
3.7m antenna diamater (main & diversity)
Antenna - Andrew Antennas
Radio - Moseley
Propogation model (reliability method) : ITU-R P.530-12
Space diversity Improvement factor only 2.45 dB
These are my calculations(see attachment - mycalculation_Marconi"). I have changed the frequency,waveguide, radio equipment and the antenna diamaters. I am getting very good availability even though the frequency is higher and the diameter of the antenna is smaller. This is due to the space diversity improvement factor which is 35dB.
Are the calculations correct? What factors effect space diversity improvement factor? Is there a formula to use?
edit: If you cannot open the files I have included them below
edit2: I have found that selecting regional standards differes availability. How to choose between North America-dispersive fade margin or ITU-Rp.530 strict equipment signature
EXISTING PATHLOSS FILE
C2A Kaimbia
Elevation (m) 1001.85 65.78
Latitude 09 06 19.14 S 09 26 21.25 S
Longitude 160 58 13.24 E 159 57 03.63 E
True azimuth (°) 251.67 71.83
Vertical angle (°) -0.85 0.05
Antenna model HPX12-36 HPX12-36
Antenna height (m) 30.00 40.00
Antenna gain (dBi) 40.60 40.60
Radome loss (dB) 0.20 0.20
TX line type EWP37 EWP37
TX line length (m) 40.00 50.00
TX line unit loss (dB /100 m) 2.91 2.91
TX line loss (dB) 1.16 1.46
Connector loss (dB) 0.20 0.20
Other TX loss (dB) 2.50 2.50
Antenna model HPX12-36 HPX12-36
Antenna height (m) 20.00 30.00
Antenna gain (dBi) 40.60 40.60
Radome loss (dB) 0.20 0.20
TX line type EWP37 EWP37
TX line length (m) 30.00 40.00
TX line unit loss (dB /100 m) 2.91 2.91
TX line loss (dB) 0.87 1.16
Connector loss (dB) 0.20 0.20
Frequency (MHz) 3800.00
Polarization Vertical
Path length (km) 117.93
Free space loss (dB) 145.50
Atmospheric absorption loss (dB) 0.82
Field margin (dB) 1.00
Diffraction loss (dB) 0.00
Main net path loss (dB) 72.03 72.03
Diversity net path loss (dB) 71.74 71.74
Radio model 3.8GHz 3.8GHz
TX power (watts) 2.00 2.00
TX power (dBm) 33.00 33.00
EIRP (dBm) 69.54 69.25
Emission designator 40M0D7W 40M0D7W
RX threshold criteria BER 10-6 BER 10-6
RX threshold level (dBm) -67.00 -67.00
Maximum receive signal (dBm) -20.00 -20.00
Main RX signal (dBm) -39.03 -39.03
Diversity RX signal (dBm) -38.74 -38.74
Thermal fade margin (dB) 28.26 28.26
Geoclimatic factor 2.16E-05
Path inclination (mr) 7.85
Fade occurrence factor (Po) 1.19E-01
Average annual temperature (°C) 27.00
SD improvement factor 2.45 2.45
Worst month - multipath (%) 99.99272 99.99272
(sec) 191.45 191.45
Annual - multipath (%) 99.99727 99.99727
(sec) 861.51 861.51
(% - sec) 99.99454 - 1723.03
Rain region ITU Region N
Flat fade margin - rain (dB) 28.26
Annual multipath + rain (%-sec) 99.99454 - 1723.03
My calculation
C2A Kaimbia
Elevation (m) 1001.85 65.78
Latitude 09 06 19.14 S 09 26 21.25 S
Longitude 160 58 13.24 E 159 57 03.63 E
True azimuth (°) 251.67 71.83
Vertical angle (°) -0.85 0.05
Antenna model HSX6-44B HSX6-44B
Antenna height (m) 30.00 40.00
Antenna gain (dBi) 36.30 36.30
Radome loss (dB) 0.20 0.20
TX line type EWP43 EWP43
TX line length (m) 40.00 50.00
TX line unit loss (dB /100 m) 2.90 2.90
TX line loss (dB) 1.16 1.45
Connector loss (dB) 0.20 0.20
Other TX loss (dB) 2.50 2.50
Antenna model HSX6-44B HSX6-44B
Antenna height (m) 20.00 30.00
Antenna gain (dBi) 36.30 36.30
Radome loss (dB) 0.20 0.20
TX line type EWP43 EWP43
TX line length (m) 30.00 40.00
TX line unit loss (dB /100 m) 2.90 2.90
TX line loss (dB) 0.87 1.16
Connector loss (dB) 0.20 0.20
Frequency (MHz) 4400.00
Polarization Vertical
Path length (km) 117.93
Free space loss (dB) 146.77
Atmospheric absorption loss (dB) 0.86
Field margin (dB) 1.00
Diffraction loss (dB) 0.00
Main net path loss (dB) 81.94 81.94
Diversity net path loss (dB) 81.65 81.65
Radio model MDRS155/4700-128MLCM EC MDRS155/4700-128MLCM EC
TX power (watts) 1.00 1.00
TX power (dBm) 30.00 30.00
EIRP (dBm) 62.24 61.95
Emission designator 26M0D7W 26M0D7W
RX threshold criteria BER 10-6 BER 10-6
RX threshold level (dBm) -72.00 -72.00
Maximum receive signal (dBm) -20.00 -20.00
Main RX signal (dBm) -51.94 -51.94
Diversity RX signal (dBm) -51.65 -51.65
Thermal fade margin (dB) 20.35 20.35
Geoclimatic factor 2.16E-05
Path inclination (mr) 7.85
Fade occurrence factor (Po) 1.25E-01
Average annual temperature (°C) 27.00
SD improvement factor 35.04 35.04
Worst month - multipath (%) 99.99619 99.99619
(sec) 100.02 100.02
Annual - multipath (%) 99.99857 99.99857
(sec) 450.11 450.11
(% - sec) 99.99715 - 900.22
Rain region ITU Region N
Flat fade margin - rain (dB) 20.35
Annual multipath + rain (%-sec) 99.99715 - 900.22
Fri, Feb 22 2013
1b_Kaimbia-C2A-4.4GHz-1.8m-117km.pl4
Reliability Method - ITU-R P.530-12
Space Diversity Method ITU-R P.530-12 IF Combining
Rain - Crane