Southern Avionics Company SD100 Manual Do Utilizador

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This PCB is Located in the USER section which contains the AC and DC Power connection Terminal, the 

EC filtering modules, the System Fusing and the Modem. 

The USER Interface PCB combines in one central location circuitry which allows the Controller/Monitor 

control over  Antenna Switching in Dual systems and  DCAD functions(DC Automatic Disconnect). It also furnishes 
the Controller/Monitor with the input AC voltage level and current draw and the Battery system Voltage and current 
readings if DC is Optioned. 

It also provides convenient interconnect to the USER for MSK interfacing (Digital Global Positioning 

Systems such as used by the US coast Guard)

In addition to this cross connects for voice input and phone line connections are present.