Selex Sistemi Integrati Inc. VOR2 Manual Do Utilizador
Model 1150A DVOR
2-74
Rev. - November, 2008
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Figure 2-27 Commutator CCA, Block Diagram
Each antenna pair is selectively enabled by the selection of its assigned display driver. Each antenna line is also
protected from extreme voltage spikes caused from lightning or other EMF generators by a gas surge suppressor.
2.3.2.23.2 Commutator CCA (2A2, 2A3) Detailed Circuit Theory
Refer to
Refer to
Figure 11-6
. There are two Commutator CCAs installed in the Commutator rack; one to switch the RF
signals to all the odd antennas, and the other to drive the even antennas. Since both CCAs perform exactly alike, the
discussion is limited to the odd antenna switch circuit board.
discussion is limited to the odd antenna switch circuit board.