NORMARC NM 7000 Series, Инструкция по установке и пусконаладке

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2.4 Monitor combining unit (MCU) adjustments
2.4.1 Course Line
Connect the Field Test Set to the CL output connector of the MCU.
Adjust the CL line stretcher to obtain 0.0% DDM.
2.4.2 Course Sector
Connect the Field Test Set to the CS output of the MCU.
Adjust the CS line stretcher to obtain a reading of 15.5% DDM.
2.5 Near field monitor adjustments
The exact position of the near field monitor antenna cannot be determined until after the flight
check is completed, due to possible mechanical re-alignment of the antenna array.
2.5.1 Mechanical alignment
Align the near field (NF) monitor antenna mechanically in the extended runway centreline
position.
2.5.2 Final electrical position adjustment
Connect the Field Test Set to the NF monitor cable. The reading should be 0.0% DDM if the
antenna is aligned correctly and no reflections appear.
Otherwise, a small mechanical re-positioning of the antenna may be necessary in order to
obtain 0.0% DDM.
2.6 DC-Loop adjustment and testing
2.6.1 DC-LOOP adjustment
The DC loop (cable fault monitor) alignment is carried out accordingly to the procedure
described in Monitor Alignment and Calibration chapter.
2.6.2 Antenna fault condition testing
For this test observe that the LLZ cabinet System Status indicates ALARM.
The transmitter must be on during this test.
The monitors should be in MANUAL mode in order to prevent transmitter from being shut off
during the test.
Disconnect one antenna at a time and check that the LLZ cabinet System Status indicates
ALARM after each antenna disconnection.
Carry out this test for all antennas.