IMPORTANT: Sealing RF coaxial connector:
The copper-plated center conductor in the RF coaxial cable,
which connects receiver to LNB, can experience electrolysis
corrosion at the LNB connector. Moisture and DC current
cause this type of corrosion. To prevent corrosion, apply a
moderate coat of silicon grease to the center conductor and
then wrap the entire connection with COAX-SEAL
®
tape
to seal.
(COAX-SEAL
®
IS A REGISTERED TRADEMARK OF UNIVERSAL ELECTRONICS, INC.)
GROUNDING
Ground pole, antenna mount assembly and feed cables
must be grounded in accordance with current National
Electric Code and local electric codes to protect from
surges due to nearby lightning strikes. The illustration below
illustrates a typical grounding method.
Clamps that provide a solid connection between ground
wire and ground source should be used.
ALL INSTALLATIONS TO CONFORM TO
THE LATEST ISSUE OF THE
NATIONAL ELECTRIC CODE.
FIG. 2.3 - GROUNDING FEED CABLES
90
80
70
60
50
40
30
20
10
0 1020304050607080
0
EARTH STATION LATITUDE IN DEGREES NORTH OR SOUTH OF EQUATOR
ELEVATION IN DEGREES
" L" IS THE DIFFERENCE BETWEEN THE EARTH STATION
ANTENNA SITE LONGITUDE AND THE SATELLITE LONGITUDE
ELEVATION CHART
CHART 2
5°
10°
15°
20°
25°
30°
35°
40°
45°
50°
55°
60°
65°
70°
75°
50°
125
°
120°
115
°
110
°
105
°
100
°
95°
90
°
85°
80
°
75°
70°
65°
50°
47.5°
45°
42.5°
40°
37.5
°
35°
32.5
°
30
°
27.5
°
25
°
47.5°
45°
42.5°
40°
37.5°
35°
32.5°
30°
27.5°
25°
