Publication: Magyar Közlöny
Issue: MK-2007-70 (Year: 2007, Number: 70)
Era: 2004-2010
Section: Melléklet a 2007. évi XLVI. törvényhez
Paragraph Index: 4508

c) interworking function. 11.3.4.3.1 HFSND FUNCTION The HFSND function shall perform the HFSND protocol between each pair of HFDL aircraft station sub-systems and HFDL ground station sub-systems by exchanging HFNPDUs. It shall perform the HFSND protocol aircraft function in the HFDL aircraft station sub-system and the HFSND protocol ground function in the HFDL ground station sub-system. 11.3.4.3.2 SUBNETWORK ACCESS FUNCTION The subnetwork access function shall perform the ISO 8208 protocol between the HFDL aircraft station sub-system or HFDL ground station sub-system and the attached routers by exchanging ISO 8208 packets. It shall perform the ISO 8208 DCE function in the HFDL aircraft station sub-system and the HFDL ground station sub-system. 11.3.4.3.3 INTERWORKING FUNCTION The interworking function shall provide the necessary harmonization functions between the HFSND, the subnetwork access and the connectivity notification functions. 11.4 GROUND MANAGEMENT SUB-SYSTEM Note.— Details on the ground management sub-system functions and interfaces are contained in the Manual on HF Data Link (Doc 9741). 11.4.1 Management functions The ground management sub-system shall perform the functions necessary to establish and maintain communications channels between the HFDL ground and aircraft station sub-systems. 11.4.2 Management/control information exchange The ground management sub-system shall interface with the ground station sub-system in order to exchange control information required for frequency management, system table management, log status management, channel management, and quality of service (QOS) data collection. 338F 27/11/03 No. 78 2007/70/II. szám Part I Annex 10 — Aeronautical Telecommunications 5/11/95 4/11/99 No. 74 Table 11-3. HF signal-in-space conditions Table 11-3a. HF signal-in-space conditions Data rate (bits per second) Number of channel paths Multipath spread (milliseconds) Fading bandwidth (Hz) per CCIR Report 549-2 Frequency offset (Hz) Signal to noise ratio (dB) in a 3 kHz bandwidth MPDU size (octets) 1 200 1 fixed – – 1 800 2 fading 1 200 2 fading 11.5 1 600 2 fading 1 300 2 fading Data rate (bits per second) Number of channel paths Multipath spread (milliseconds) Fading bandwidth (Hz) per CCIR Report 549-2 Frequency offset (Hz) Signal to noise ratio (dB) in a 3 kHz bandwidth MPDU size (octets) 1 200 2 fading 1 200 2 fading 11.5 338G 2007/70/II. szám Part I Annex 10 — Aeronautical Telecommunications 5/11/95 4/11/99 No. 74 11.3.2.4 RECEPTION OF DATA 11.3.2.4.1 FREQUENCY SEARCH Each HFDL aircraft station shall automatically search the assigned frequencies until it detects an operating frequency. 11.3.2.4.2 RECEPTION OF PPDUS The HF data link receiver shall provide the means to detect, synchronize, demodulate and decode PPDUs modulated according to the waveform defined in 11.3.1.5, subject to the following distortion:

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