Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3904

b) monitoring the standby equipment. 11.3.2.1 Whenever the monitor system rejects one of the equipments the facility continuity of service level will be reduced because the probability of cessation of signal consequent on failure of other equipment will be increased. The change of performance must be automatically indicated at remote locations. 11.3.2.2 An identical monitoring arrangement to the azimuth is used for the elevation facility. ATT G-33 23/11/06 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 11.3.3 In the above example, the equipment would include provision to facilitate monitoring system checks at intervals specified by the manufacturer, consequent to his design analysis, to ensure attainment of the required integrity level. Such checks, which can be manual or automatic, provide the means to verify correct operation of the monitoring system including the control circuitry and changeover switching system. It is desirable to perform these checks in such a way that there is no interruption to operational service. The advantage of implementing an automatic monitor integrity test is that it can be accomplished more frequently, thereby achieving a higher level of integrity. 11.3.4 Interruption of facility operation due to primary power failures is avoided by the provision of suitable standby supplies, such as batteries or “no-break” generators. Under these conditions, the facility should be capable of continuing in operation over the period when an aircraft may be in the critical stages of the approach. Therefore the standby supply should have adequate capacity to sustain service for at least two minutes. 11.3.5 Warnings of failures of critical parts of the system, such as the failure of the primary power supply, must be given at the designated control points if the failure affects operational use. 11.3.6 In order to reduce failure of equipment that may be operating near its monitor tolerance limits, it is useful for the monitor system to include provision to generate a pre-alarm warning signal to the designated control point when the monitored parameters reach a limit equal to a value on the order of 75 per cent of the monitor alarm limit. 11.3.7 Protection of the integrity of the signal-in-space against degradation, which can arise from extraneous electromagnetic interference falling within the MLS frequency band or from reradiation of MLS signals, must be considered. 11.3.8 A field monitor can provide additional protection by providing a warning against exceeding path following error limits due to physical movement of the MLS antenna or by protecting against faults in the integral monitor. 11.3.9 In general, monitoring equipment design is based on the principle of continuously monitoring the radiated signals-in-space at specific points within the coverage volume to ensure their compliance with the Standards specified at Chapter 3, 3.11.5.2.3 and 3.11.5.3.3. Although such monitoring provides to some extent an indication that the signal-in-space at all other points in the coverage volume is similarly within tolerance, this is largely inferred. It is essential therefore to carry out rigorous inspections at periodic intervals to ensure the integrity of the signal-in-space throughout the coverage volume. 11.3.10 An equipment arrangement similar to that at 11.3.2, but with no transmitter redundancy, and the application of the guidance outlined in 11.3.5, 11.3.6, 11.3.7, 11.3.8, and 11.3.9, would normally be expected to achieve the objectives for integrity and continuity of service for level 2. 12. Classification of MLS approach azimuth elevation and DME ground facilities 12.1 The classification system as described in the following paragraphs, is intended to identify in a concise way essential information to be used by instrument procedure designers, operators and air traffic services regarding the performance of a particular MLS installation. The information is to be published in the aeronautical information publication (AIP). 12.2 The information concerning MLS facility performance should comprise:

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