23
INSTALLING THE ANTENNA
Setting block zones
Vessel structures around an antenna may interfere with the reception of the satellite
signal. Therefore, It is required to set a block zone which notifies users that the
antenna cannot receive satellite signal due to blockages. You can create five block
zones by inputting azimuth and elevation values into the ACU. When the antenna is
within the block zones, the ACU works as follows.
1.
“BLOCK” will be displayed on the ACU screen.
2.
Tracking continues as long as the signal level is greater than the predefined
threshold value. When the signal level drops below the threshold value the
antenna will wait and then re-target the satellite you targeted last. The amount
of time the antenna waits before entering search mode is called the "Search
Wait Time" and can be adjusted in the parameters settings. The antenna will
continue to re-target the satellite until the satellite is re-acquired and tracking
can be resumed.
3.
A transmit inhibit output from the ACU will disable/mute the modem transmission.
System Cables
Before installing the system cables, you need to take the following points into
consideration.
1. All cables must be securely correctly and protected from physical damage
and
exposure to heat and humidity.
2. Take note of bend radii of the cables, this is cable dependent and can be
confirmed with the specifications of the cable manufacturer.
3. Where cables pass though a bulkheads, deck head, walls or other structures,
correct methods of security must be followed ensuring protection from
water, fire, gas or explosions that make affect the integrity of the vessels
structure at this point of cable transit. This should be approved or carried out
by the responsible persons on-board the vessel e.g.. the ships electrician .
Power Requirement
Intellian v100Ka has been designed to work on a vessel’s power supplies rated between
100-240V AC.
• RF Cable (Customer Furnished)
Due to signal and voltage degradation/losses along the length of RF cabling at
L-Band Frequencies, Intellian recommends the following 50 ohm coax cable types
for standard system installations. For cables that run longer than 200 meters,
please consult Intellian Technologies.
Recommended
RF cables
Coaxial Cable
Type
Attenuation in
dB/100M
Attenuation in
dB/M
Recommended
Cable Length
LMR300
30.3
0.303
35M
LMR400
19.6
0.196
60M
LMR500
15.9
0.159
80M
LMR600
12.8
0.128
100M
LMR900
8.6
0.086
150M
LMR1200
6.5
0.065
200M
