KNS Ku-BAND RX, Installation And Operation Manual

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3.6.3 ACU Gyro Compass Cable Connection ..................................................... 26
3.6.3.1 Synchro-Type Gyro Connection .............................................................. 26
3.6.3.2 Step-by-Step Type of Gyro Connection ................................................ 27
3.6.3.3 NMEA Type of Gyro Connection ............................................................ 28
3.6.3.4 RJ-45 Connection for Satellite Modem ................................................. 28
3.6.3.5 NMEA Port Connection for GPS Data ................................................... 30
3.6.3.6 M&C Port Connection .............................................................................. 31
3.6.3.7 Ethernet Port .............................................................................................. 31
4. Theory ................................................................................................ 32
4.1 Self-Disciplining Algorithm ........................................................................ 32
4.2 Searching and Tracking Reference ........................................................... 32
4.2.1 Searching Reference ..................................................................................... 33
4.2.1.1 DVB C/N Threshold ................................................................................... 33
4.2.1.2 DVB AGC Threshold .................................................................................. 33
4.2.1.3 RSSD Threshold.......................................................................................... 33
4.2.1.4 DVB Carrier Lock Bit ................................................................................. 33
4.2.1.5 External Lock Bit ........................................................................................ 34
4.2.1.6 External AGC Threshold............................................................................ 34
4.2.1.7 External Lock Bit & C/N Threshold ........................................................ 35
4.2.2 Tracking Reference ....................................................................................... 35
4.2.2.1 RSSD Level .................................................................................................. 35
4.2.2.2 DVB AGC Level ........................................................................................... 35
4.2.2.3 DVB C/N Ratio ........................................................................................... 35
4.3 Methods of Finding Satellite ..................................................................... 36
4.3.1 Manual Pointing ............................................................................................ 36
4.3.2 Manual Searching ......................................................................................... 36
4.3.3 Auto Searching .............................................................................................. 36
4.3.4 Reference Searching ..................................................................................... 37