3 NM 3524 12 Elements antenna system adjustments - LLZ (Dual frequency)..... 23
3.2.1 CSB and SBO cables .................................................................................. 23
3.2.2 CSB/SBO phasing ....................................................................................... 24
3.2.3 Antenna cable lengths (Electrical phase equality) ....................................... 24
3.2.4 Antenna pair phasing................................................................................... 25
3.2.5 Phase and amplitude transfer measurement ............................................... 26
3.2.6 Antenna return loss...................................................................................... 27
3.3.1 DDM check of ADU O/P .............................................................................. 28
3.3.2 Clearance SBO power ................................................................................. 29
3.3.3 DDM field check........................................................................................... 29
Monitor combining unit (MCU) adjustments ....................................................... 29
4 NM 3525 24 Elements antenna system adjustments - LLZ ................................... 31
4.2.1 CSB and SBO cables .................................................................................. 31
4.2.2 CSB/SBO phasing ....................................................................................... 32
4.2.3 Antenna cable lengths (Electrical phase equality) ....................................... 32
4.2.4 Antenna pair phasing................................................................................... 33
4.2.5 Phase and amplitude transfer measurement ............................................... 34
4.2.6 Antenna return loss...................................................................................... 35
4.3.1 DDM check of ADU O/P .............................................................................. 35
4.3.2 Clearance SBO power ................................................................................. 37
4.3.3 DDM field check........................................................................................... 37
Monitor combining unit (MCU) adjustments ....................................................... 37
Summary of Contents for NM 7000 Series
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