User's Manual

AR24027 Operator’s Manual (rev A)
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Table 3-2. Loss at 2.4 GHz for Standard Coaxial Cable Types
Cable Type Loss per 100 ft. (30 m)
RG-8 A/U 14.4 dB
Belden 9913 8.0 dB
LMR 195 19 dB
LMR 400 6.7 dB
To determine total cable loss for your installation, perform the following calculation:
For US units, multiply length in feet by the loss figure and divide by 100.
For metric units, multiply length in meters by the loss figure and divide by 30.
For example, for a 75-foot length of Belden 9913, the loss is:
3.3.6 Connector Loss
Loss is introduced with each pair of cable connectors. Attenuation losses of some standard cable
types are shown in the following table:
Connector type Loss per connector
N-Type 0.25 dB
SMA-Type 0.25 dB
The loss of each pair of connectors on all cables must be included to determine the total signal loss
(attenuation) between the antenna and ODU.
3.3.7 Other Considerations – Antenna Grounding
WARNING
VERY IMPORTANT INFORMATION
As an elevated metal object with a wire connection below, an antenna is an excellent lightning
attractor, and an effective ground must be provided to deflect lightning strikes to ground. An
75 x 8.0
100
= 6.0 dB