
SBX-3 Reference Manual
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3. SBX-3 OEM Beacon Receiver......................................................................................29
3.1 LED Indicators......................................................................................................29
3.2 SBX-3 Block Diagram..........................................................................................30
3.3 SBX-3 Mechanical Layout...................................................................................31
3.4 SBX-3 Connector Pin Assignments..................................................................32
3.4.1 Antenna Interface...................................................................................33
3.4.2 Signal Lock Indicator Pin......................................................................34
3.4.3 Reset Pin..................................................................................................34
3.5 SBX-3 Dual Serial Port Overview.....................................................................35
3.5.1 Single Serial Port Operation................................................................35
3.5.2 Dual Serial Port Operation..................................................................36
3.5.3 SBX-3 ‘Y’ Data Cable............................................................................36
3.6 SBX-3 Operating Modes.....................................................................................38
3.6.1 Automatic Beacon Search (ABS) Mode..............................................38
3.6.2 Manual Mode..........................................................................................40
3.7 Factory Default Settings......................................................................................40
3.8 SBX-3 Integration Summary...............................................................................41
3.9 Radio Frequency Immunity and Emissions......................................................43
4. Antenna Installation.......................................................................................................45
4.1 Antenna Placement To Optimize Reception..................................................45
4.2 Installation.............................................................................................................46
4.2.1 MBA-3 / MBA-3A E-Field Antenna.....................................................46
4.2.2 MBL-3 H-Field Antenna.........................................................................49
4.2.3 ABL-1 Aircraft Antenna........................................................................49
4.2.4 MGL-3 Combined GPS/Beacon Antenna..........................................50
4.2.5 MGW-1....................................................................................................50
4.2.6 AVL-1.......................................................................................................51