WaveRider LMS4000 User Manual page 200

Calculate the antenna system gain by adding the value of the insertion loss for each
component of the antenna system, excluding the antenna, and subtracting the total of that
sum from the antenna gain. You can measure the insertion loss of the components, and the
antenna gain, at the frequency of interest, or obtain it by referencing the manufacturer's
supplied literature.
For example, with a Yagi antenna system, 10m of cable, a surge protector, and a bandpass
filter, you would calculate the following antenna system gain:
• Antenna Gain: 9.1dBi
• Insertion loss:
•
•
•
• Antenna System Gain:
The antenna gain (9.1dBi) minus the total insertion loss (5.3dBi), yields an antenna system
gain of 3.8dBi, which is a valid antenna configuration, because the antenna system gain is
lower than the maximum permissible value of 9.1dBi for a yagi antenna type.
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Cable/connectors: - 4.0dB
Surge Protector: - 0.2dB
Filter: - 1.1dB
WARNING!
To prevent equipment damage, you must use the WaveRider
proprietary WCM connector to connect transmission line and
antennas to the EUM2000.
WARNING!
Use of an outdoor antenna with the EUM requires professional
installation, in accordance with FCC guidelines.
WARNING!
Antennas used with the EUM must not present a short to
ground at the EUM antenna port. Contact the WaveRider
Customer Support Centre for more information.
3.8dBi
APCD-LM043-4.0