User's Manual Part 2

230 APCD-LM043-8.0 (DRAFT C)
Appendix F
antenna gain, at the frequency of interest, or obtain it by referencing the manufacturer’s
supplied literature.
WaveRider Guidelines for outdoor installation are:
• select a cable of type and length so that cable loss is 3.5dB, including connectors.
• use a surge protector, which has about 0.1 db loss,
• use a WaveRider jumper cable to connect the modem to the exterior cable or surge
protector. The jumper cable has a loss of 1 dB.
For example, with a Yagi antenna system, 15m of cable, a surge protector, and a jumper
cable (from modem to surge protector), you would calculate the following antenna system
gain:
• Antenna Gain: 13.0dBi
• Insertion loss:
• External Cable: - 3.5dB
• Surge Protector: - 0.1dB
• Jumper Cable: - 1.0dB
•- 4.6dBi
The antenna gain (13.0dBi) minus the total insertion loss (4.6dBi), yields an antenna system
gain of 8.4dBi, which is a valid antenna configuration, because the antenna system gain is
lower than the maximum permissible value of 8.8 dBi.
WARNING!
To prevent equipment damage, you must use the WaveRider
proprietary WCM connector to connect transmission line and
antennas to the EUM3000.
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.