NORMARC NM 7000 Series - Page 63

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7 NM 3544 Sideband reference antenna system adjustment - Glide path............53
7.1 Mechanical alignment of mast and antennas.....................................................53
7.1.1 Preparation of mechanical- and electrical data............................................53
7.1.2 Forward shift (FWD) ....................................................................................53
7.1.3 Antenna heights...........................................................................................53
7.1.4 Antenna offsets............................................................................................53
7.2 Initial electrical measurements........................................................................... 53
7.2.1 Antenna cable lengths (Electrical phase equality).......................................53
7.2.2 Monitor return cable length..........................................................................54
7.2.3 Phase and amplitude transfer measurement...............................................54
7.2.4 Antenna return loss......................................................................................55
7.3 CSB/SBO Phasing .............................................................................................55
7.3.1 CSB and SBO cables ..................................................................................55
7.3.2 CSB/SBO phasing .......................................................................................56
7.4 Sector width adjustment.....................................................................................56
7.4.1 SBO power adjustment................................................................................56
7.5 Monitor combining unit (MCU) adjustments .......................................................56
7.5.1 Procedure for horizontal terrain (FSL = 0°).................................................. 56
7.5.2 Procedure for sloping terrain (1° > FSL > -1°) .............................................56
7.6 Location of near field antenna position...............................................................57
7.6.1 Near Field Monitor Position Search.............................................................58
7.7 Antenna distribution unit (ADU) phase and amplitude check.............................59
7.7.1 Preparation ..................................................................................................59
7.7.2 Procedure ....................................................................................................59
8 NM 3545 M-Array antenna system adjustments - Glide path ...............................61
8.1 Mechanical alignment of mast and antennas.....................................................61
8.1.1 Preparation of mechanical- and electrical data............................................61
8.1.2 Forward shift (FWD) ....................................................................................61
8.1.3 Antenna heights...........................................................................................61
8.1.4 Antenna offsets............................................................................................61
8.2 Initial electrical measurements........................................................................... 61
8.2.1 Antenna cable lengths (Electrical phase equality).......................................61
8.2.2 Monitor return cable length..........................................................................62
8.2.3 Phase and amplitude transfer measurement...............................................62
8.2.4 Antenna return loss......................................................................................63
8.3 CSB/SBO Phasing .............................................................................................63
8.3.1 CSB and SBO cables ..................................................................................63
8.3.2 CSB/SBO phasing .......................................................................................63
8.4 Sector width adjustment.....................................................................................64
8.4.1 SBO power adjustment................................................................................64
8.5 Monitor combining unit (MCU) MOA 338D adjustments ....................................64
8.5.1 Adjustments procedure................................................................................ 65
8.6 Location of near field antenna position...............................................................65
8.6.1 Near Field Monitor Position Search.............................................................65
8.7 Antenna distribution unit (ADU) DIA 346A phase and amplitude check.............66
8.7.1 Preparation ..................................................................................................66
8.7.2 Procedure ....................................................................................................67
9 NM 3561 Single antenna system adjustments - MKR............................................69
9.1 Mechanical alignment.........................................................................................69
9.1.1 Antenna mast...............................................................................................69
9.2 Electrical measurements....................................................................................69
9.2.1 Antenna return loss......................................................................................69