Appendix A: Path Evaluation Information
A-5
Moseley SL9003Q
602-12016-01 Revision J
system. The magnitude of the fade margin is used in subsequent calculations of path
availability (up time). The following instructions will help you complete the Path Calculation
Balance Sheet (see Section A.2.7):
Line 1
: Enter the power output of the transmitter in dBm. Examples: 5w = +37.0 dBm,
6.5w = +38.0 dBm, 7w = +38.5 dBm, 8w = +39.0 dBm (dBm = 30 + 10 Log Po [in
watts]). For the standard 9003Q, enter +30 dBm for 64 QAM and +33 dBm for 16 QAM
operation.
Lines 2 & 3
: Enter Transmitter and Receiver antenna gains over an isotropic source. Refer
to the Antenna Gain table below for the power gain of the antenna.
NOTE
: If the manufacturer quotes a gain in dBd (referred to a dipole), dBi is
approximately dBd +1.1 dB.
Table A-1. Typical Antenna Gain
ANTENNA TYPE
450 MHz BAND
950 MHz BAND
5 element Yagi
12 dBi
12 dBi
Paraflector
16 dBi
20 dBi
4' Dish* (1.2 m)
13 dBi
19 dBi
6' Dish* (1.8 m)
17 dBi
23 dBi
8' Dish* (2.4 m)
19 dBi
25 dBi
10' Dish* (3.0 m)
22 dBi
27 dBi
Line 4
: Add lines 1, 2, and 3 and enter here. This is the total gain in the proposed system.
Line 5
: Enter the amount of free space path loss as determined by the formula given in
Section A.2.2 or see the table below.
Table A-2. Free Space Loss
DISTANCE
450 MHz
950 MHz
5 Miles (8 km)
104 dB
110 dB
10 Miles (16 km)
110 dB
116 dB
15 Miles (24 km)
114 dB
120 dB
20 Miles (32 km)
116 dB
122 dB
25 Miles (40 km)
118 dB
124 dB
30 Miles (48 km)
120 dB
126 dB
Line 6
: Enter the total transmitter transmission line loss. Typical losses or shown in the
following table:
Table A-3. Transmission Line Loss
FREQUENCY BAND LDF4-50 (per 100 meters)
LDF5-50 (per 100 meters)
330 MHz
4.6 dB
2.4 dB
450 MHz
5.5 dB
2.9 dB
470 MHz
5.7 dB
3.0 dB
950 MHz
8.3 dB
4.6 dB
Line 7
: Enter the total receiver transmission line loss (see Table A-3 above).
Summary of Contents for Starlink SL9003Q
Page 86: ...5 22 Section 5 Module Configuration Moseley SL9003Q 602 12016 01 Revision J ...
Page 90: ...6 4 Section 6 Customer Service Moseley SL9003Q 602 12016 01 Revision J ...
Page 110: ...A 10 Appendix A Path Evaluation Information Moseley SL9003Q 602 12016 01 Revision J ...
Page 118: ...D 2 Appendix D Microvolt dBm Watt Conversion 50 ohms Moseley SL9003Q 602 12016 01 Revision J ...