SAC SA100 - 1 Introduction; 2 Theory of Operation, Radiobeacon; 3 Antennas; 4 Installation and Operation

SOUTHERN AVIONICS COMPANY
Model SA100 Dual viiContents
Contents
1 Introduction ............................................................................................................. 1-1
1.1 General Description: SA100 ............................................................................. 1-1
1.2 Specifications: SA100....................................................................................... 1-3
1.3 General Description: SA Radiobeacon Control System ................................... 1-7
1.4 Specifications: Automatic Transfer Unit SA Series........................................... 1-9
1.4.1 Local Radiobeacon Control...................................................................... 1-9
1.4.2 Remote Radiobeacon Control Panel........................................................ 1-9
1.4.3 Control Link Specifications..................................................................... 1-10
2 Theory of Operation, Radiobeacon ....................................................................... 2-1
2.1 Functional Description: SA100 ......................................................................... 2-1
2.2 Functional Description: Autotransfer System SA Series................................... 2-5
2.3 Detailed Circuit Analysis: SA100 ...................................................................... 2-7
2.3.1 Synthesizer PWB (KWOSYN) .................................................................. 2-7
2.3.2 RF Driver................................................................................................ 2-10
2.3.3 Tone Key................................................................................................ 2-11
2.3.4 Audio PWB (Optional) ............................................................................ 2-14
2.3.5 Modulator Driver..................................................................................... 2-17
2.3.6 Keyer...................................................................................................... 2-20
2.3.6.1 Keyer Code.................................................................................... 2-20
2.3.6.2 Coder Shift Register PWB ............................................................. 2-20
2.3.7 Modulator (DMOD) ................................................................................. 2-26
2.3.8 Power Amplifier ...................................................................................... 2-29
2.3.9 Filter ....................................................................................................... 2-32
2.3.10 Monitor ................................................................................................. 2-36
2.3.11 DC Power Supply (Optional) ................................................................ 2-46
2.3.12 AC Power Supply (Optional) ................................................................ 2-53
2.4 Detailed Circuit Analysis: Automatic Transfer System SA Series................... 2-62
2.4.1 Local Radiobeacon Control System....................................................... 2-62
2.4.1.1 DC Auto Disconnect PWB ............................................................. 2-73
2.4.2 Radiobeacon Remote Control................................................................ 2-76
2.4.2.1 Serial Interface PWB...................................................................... 2-76
2.4.2.2 Modem PWB.................................................................................. 2-76
3 Antennas.................................................................................................................. 3-1
3.1 Mast Antenna.................................................................................................... 3-1