Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 3251

f) monitor and control action period (3.11.5.2.3 and 3.11.5.3.3) expanded to a six-second period. Note uidance material on application of the simplified M S configurations is provided in Attachment 3.11.4 Signal-in-space characteristics — angle and data functions 3.11.4.1 Channelling 3.11.4.1.1 Channel arrangement The MLS angle and data functions shall operate on any one of the 200 channels assigned on the frequencies from 5 031.0 MHz to 5 090.7 MHz as shown in Table A. 3.11.4.1.1.1 Channel assignments in addition to those specified in 3.11.4.1.1 shall be made within the 5 030.4 to 5 150.0 MHz sub-band as necessary to satisfy future air navigation requirements. 3.11.4.1.2 Channel pairing with DME The channel pairing of the angle and data channel with the channel of the ranging function shall be in accordance with Table A. 3.11.4.1.3 Fre uency tolerance The operating radio frequency of the ground equipment shall not vary more than plus or minus 10 kHz from the assigned frequency. The frequency stability shall be such that there is no more than a plus or minus 50 Hz deviation from the nominal frequency when measured over a one-second interval. 3.11.4.1.4 Radio fre uency signal spectrum 3.11.4.1.4.1 The transmitted signal shall be such that, during the transmission time, the mean power density above a height of 600 m (2 000 ft) shall not exceed 94.5 dBW/m2 for angle guidance or data signals, as measured in a 150 kHz bandwidth centred 840 kHz or more from the nominal frequency. 3.11.4.1.4.2 The transmitted signal shall be such that, during the transmission time, the mean power density beyond a distance of 4 800 m (2.6 NM) from any antennas and for a height below 600 m (2 000 ft) shall not exceed 94.5 dBW/m for angle guidance or data signals, as measured in a 150 kHz bandwidth centred 840 kHz or more from the nominal frequency. Note Re uirements in are applicable when the operational coverage of another M S ground station has overlap with the radio hori on of the considered ground station Note uidance material on M S fre uency planning is provided in Attachment 3.11.4.2 Polari ation The radio frequency transmissions from all ground equipment shall be nominally vertically polarized. The effect of any horizontally polarized component shall not cause the guidance information to change by more than 40 per cent of the PFE allowed at that location with the airborne antenna rotated 30 degrees from the vertical position or cause the PFE limit to be exceeded. 2007/70/II. szám C a ter Annex 10 — Aeronautical Communications 23/11/06 3.11.4.3 Time division multiplex (TDM) organi ation 3.11.4.3.1 Both angle information and data shall be transmitted by TDM on a single radio frequency channel. 3.11.4.3.2 Synchroni ation The transmissions from the various angle and data ground equipment serving a particular runway shall be time synchronized to assure interference-free operations on the common radio frequency channel of operation. 3.11.4.3.3 Function rates Each function transmitted shall be repeated at the rates shown in the following table: Function Average rate ( ) measured over any second period Approach azimuth guidance 13 0.5 High rate approach azimuth guidance 39 1.5 Back azimuth guidance 6.5 0.25 Approach elevation guidance 39 1.5 Flare elevation guidance 39 1.5 Basic data see Appendix A, Table A-7 Auxiliary data see Appendix A, Tables A-10 and A-12 3.11.4.3.3.1 Recommendation hen the proportional guidance sector is not greater than plus or minus degrees and a need for flare elevation or other growth functions at that facility is not anticipated the high rate approach a imuth function should be used Note Application information is contained in Attachment 3.11.4.3.4 Function timing Timing standards for each angle and data function shall be as specified in Appendix A, Tables A-1 through A-6 and A-8. The ground equipment internal timing accuracy of each listed event including jitter shall be the specified nominal value plus or minus 2 microseconds. The timing jitter shall be less than 1 microsecond root mean square (RMS). Note The timing of each listed event indicates the beginning of the event time slot and the end of the previous event time slot The characteristics and timing of the actual transmissions are as specified in the applicable paragraphs Note Information on the measurement of the timing accuracy is contained in Attachment 3.11.4.3.5 Function se uence The time interval between repetitive transmissions of any one function shall be varied in a manner which provides protection from synchronous interference. Note Each function transmission is an independent entity which can occur in any position in the TDM se uence (with the exception that bac a imuth must be preceded by basic data word ) Note Some se uences which have demonstrated protection from synchronous interference are illustrated in Attachment 3.11.4.4 Preamble 3.11.4.4.1 A preamble signal shall be transmitted throughout the applicable coverage sector to identify the particular function to follow. The preamble shall consist of a radio frequency carrier acquisition period, a receiver reference time code, and a function identification code. The timing of the preamble transmissions shall be as specified in Appendix A, Table A-1. 2007/70/II. szám Annex 10 — Aeronautical Communications Volume I 23/11/06 3.11.4.4.2 Carrier ac uisition The preamble transmission shall begin with a period of unmodulated radio frequency carrier as specified in Appendix A, Table A-1. 3.11.4.4.3 Modulation and coding 3.11.4.4.3.1 Differential phase shift eying (DPS ) The preamble codes and the basic and auxiliary data signals specified in 3.11.4.8 shall be transmitted by DPSK of the radio frequency carrier. A “zero” shall be represented by a 0 degrees plus or minus 10 degrees phase shift and a “one” shall be represented by a 180 degrees plus or minus 10 degrees phase shift. The modulation rate shall be 15 625 bauds. The internal timing accuracy of the DPSK transition shall be as specified in 3.11.4.3.4. There shall be no amplitude modulation applied during the phase transition. The transition time shall not exceed 10 microseconds, and the phase shall advance or retard monotonically throughout the transition region. 3.11.4.4.3.2 Receiver reference time All preambles shall contain the receiver reference time code, 11101 (bits I1 to I5). The time of the last phase transition midpoint in the code shall be the receiver reference time. The receiver reference time code shall be validated by decoding a valid function identification immediately following the receiver reference time code. 3.11.4.4.3.3 Function identification A code for function identification shall follow the receiver reference time code. This code shall consist of the five information bits (I6 to I10) allowing identification of 31 different functions, plus two parity bits (I11 and I12) as shown in the following table: Code Function I I I I I I I Approach azimuth High rate approach azimuth Approach elevation Flare elevation Back azimuth 360 azimuth Basic data 1 Basic data 2 Basic data 3 Basic data 4 Basic data 5 Basic data 6 Auxiliary data A Auxiliary data B Auxiliary data C Note The function identification codes have been chosen so that parity bits I and I satisfy the e uations I6 I7 I8 I9 I10 I11 EVEN I6 I8 I10 I12 EVEN 3.11.4.5 Angle guidance parameters Angle guidance information shall be encoded by the amount of time separation between the centres of the received TO and FRO scanning beam main lobes. The coding shall be interpreted in the airborne equipment as a linear function of time as follows: ș (T0 t) V/2 2007/70/II. szám C a ter Annex 10 — Aeronautical Communications 23/11/06 where: ș Azimuth or elevation guidance angle in degrees t Time separation in microseconds between TO and FRO beam centres T0 Time separation in microseconds between TO and FRO beam centres corresponding to zero degrees V Scan velocity scaling constant in degrees per microsecond. 3.11.4.5.1 The values of the angle guidance parameters shall be as shown in the following table: Function Maximum scan angle (degrees) alue of t for maximum scan angle ( s) To ( s) (degrees

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