Andrew TYPE 900 Инструкция по сборке Руководство - Страница 7
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ELEVATION CHART
"
L" IS THE DIFFERENCE BETWEEN THE EARTH STATION
ANTENNA SITE LONGITUDE AND THE SATELLITE LONGITUDE
90
5°
80
10°
70
15°
20°
60
25°
30°
50
35°
40°
40
45°
50°
30
55°
60°
20
65°
10
70°
75°
0
0
10
20
30
EARTH STATION LATITUDE IN DEGREES NORTH OR SOUTH OF EQUATOR
8
95°
40
50
60
70
CHART 2
CLAMP
SURFACE
14
6
9
7
10
FIG. 2.2 - INSTALLATION OF FEED AND FEED SUPPORT LEGS TO ANTENNA
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
to seal.
(COAX-SEAL
®
IS A REGISTERED TRADEMARK OF UNIVERSAL ELECTRONICS, INC.)
GROUNDING
ALL INSTALLATIONS TO CONFORM TO
THE LATEST ISSUE OF THE
NATIONAL ELECTRIC CODE.
Ground pole, antenna mount assembly and feed cables
must be grounded in accordance with current National
80
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.
12
13
11
9
6
6
4
8
7
15
Junction Block (9)
®
tape
*Coaxial Cable
To Receiver
*Ground Block
NEC SECTION 810-20
*Groundwire
NEC SECTION 810-20
FIG. 2.3 - GROUNDING FEED CABLES
5
*Coaxial Cable
From LNB
*Items Not
Supplied
5