COBHAM Sea Tel 9711-56 IMA C Band, Installation Manual

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Introduction Sea Tel 9711-56 IMA
2-2
EAR Controlled - ECCN EAR99
3. Satellite Modem and other below decks equipment required for the desired communications
purposes.
4. Spectrum Analyzer (Optional)
5. Control, RF and Other cable connections
Figure 1 -1 Series 11 TXRX Simplified Block Diagram
2.5. Dual Antenna Configuration
Sometimes, 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. NOTE: The
RXIF from EACH antenna MUST be connected to the RF IN on the rear panel of its respective MXP then
RFOUT is connected to the RXIF input of the Dual Antenna Arbitrator. This connection scheme is required for
MXP “A” to be able to control Antenna “A” (and ONLY Antenna “A”) AND MXP “B” to be able to control
Antenna “B” (and 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 the each of the MXPs is connected to the arbitrator panel to control it. The blockage
output terminal of each MXP provides a “blocked” output to the arbitrator its respective antenna is within a
blockage zone programmed into that MXP. When not blocked the SW2 terminal output(s) will signal an
“unblocked” state..