Series 12 Ku-Band System Configuration(s)
6012-12W Installation Manual
1.5.
Dual Antenna Configuration
Due to very large blockage conditions, you may need to install a dual antenna configuration to provide
uninterrupted services. Two full antenna systems are installed and the MXP control outputs are connected to
an arbitrator switch panel which then is connected to the below decks equipment. The connection scheme is
required for MXP “A” to control ONLY Antenna “A” AND MXP “B” to control ONLY Antenna “B.”.
You will program the blockage zone(s) for each of the two antennas (refer to Setup – Blockage Zones). The
blockage output from each MXP is fed to the arbitrator. The blockage output is a transistor “short” to ground
when the antenna is within a programmed blockage zone and is an “open” when not blocked.
When one antenna is blocked, its blockage output will command the arbitrator panel to switch services to the
modem from that antenna to the other antenna. The arbitrator panel provides a logic latch to prevent excess
switching when the ship heading is yawing, therefore, causing if the antenna to be repeat blocked –
unblocked – blocked.
1.6.
Automatic Beam Switching (ABS)
ABS is a method of communicating remotely via an overhead channel, or locally from the modem, to
reconfigure the ACU(s) to use a different beam on the same satellite or to use a different satellite. The
modems include commands which allow remotely setting all of the necessary parameters and to
command the targeting of the desired satellite
1.7.
OpenAMIP™, ROAM or VACP
These each have standardized language incorporated into their (iDirect, Comtech & STM) modems which
communicates automatic beam switching settings from their options file to the Sea Tel ACU(s). This provides
the network a means of controlling automatic beam switching by the settings in the options file in the remote
modem.
1.8.
FCC Compliance
This antenna system, with current software, contain FCC compliant supervisory software to continuously
monitor the pedestal pointing error. This supervisory software will trip an error flag, which will automatically
cease transmission within 100 milliseconds, if the pointing error should exceed 0.5 degrees. Transmission will
not resume until the pointing error drops below 0.2 degrees.
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EAR Controlled - ECCN EAR99
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