Chapter 4 RF Antennas and Hardware

Question 1

The first fresnel zone should have a minimum of 60% clearance in bridge links and cwnp recommends blank clearance.

Answer 1

80%

Question 2

Earth bulge may be a factor in links over blank miles in distance.

Answer 2

7

Question 3

counter the impact of interference from trees and buildings and counter the impact of earth bulge.

Answer 3

Increasing antenna height

Question 4

antennas radiate outward around the antenna with less signal directly above and beneath the antenna.

Answer 4

Omni-directional

Question 5

APS usually use either omni-directional or semi-directional antennas when they use

Answer 5

Internal antennas

Question 6

semi-directional antennas radiate in a 180 degree or less range in the intended direction of

Answer 6

Propagation

Question 7

are examples of semi-directional antennas.

Answer 7

Patch and panel

Question 8

highly directional antennas include

Answer 8

Parabolic dish and grid antennas

Question 9

the azimuth chart shows the top-down view of the antenna and the elevation chart shows the side view.

Answer 9

top-down view and side view.

Question 10

antenna beamwidth is calculated horizontally and vertically where the signal drops by

Answer 10

3 dB

Question 11

should be selected with the appropriate connectors for your system.

Answer 11

RF cables, connectors, and other components

Question 12

Help to protect systems from incidental energy generated by nearby lightning strike they do not protect from a direct lightning strike and most instance

Answer 12

Lightning arrestors

Question 13

when mounting on towers

Answer 13

it is best to hire trained and certified installation technicians, rather than doing it yourself.