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provisions of 6.2.4.4 shall be made on the basis of regional air
navigation agreements which specify the airspace of operation
and the implementation timescales. The agreements shall
provide at least two years' notice of mandatory compliance of
ground systems.
6.3 SYSTEM CHARACTERISTICS OF
THE AIRCRAFT INSTALLATION
6.3.4.2 The amount of power from a VDL aircraft
transmitter under all operating conditions when measured over
the 25 kHz charnel bandwidth of the second adjacent channel
shall be less than minus 25 dBm and from thereon it shall
monotonically decrease at the minimum rate of 5 dB per
octave to a maximum value of minus 52 dBm.
6.3.4.2.1 After 1 January 2002, the amount of power from
all new installations of a VDL aircraft transmitter under all
operating conditions when measured over the 25 kHz channel
bandwidth of the second adjacent channel shall be less than
minus 28 dBm.
6.3.4.2.2 Al'tcr 1 January 2002, the amount of power from
all new installations of a VnL aircraft transmitter under all
operating conditions when measured over the 25 kHz channel
bandwidth of the fourth adjacent channel shall be less than
minus 38 dBm, and from thereon it shall monotonically
decrease at the minimum rate of 5 dB per octave to a
maximum value of minus 53 dBm.
6.3.1 Frequency stability. The radio frcqucncy of VDL 6.3.4.3 The amount of power from a VDL aircraft
aircraft equipment shall not vary more than plus or minus transmitter undcr all operating conditions when measured over
0.0005 per cent (5 parts per million) from the assigned a 16 kHz channel bandwidth centred on the first adjacent
frequency. channel shall not exceed minus 20 dBm.
Part Z Annex 10 - Aeronautical Telecommunications
6.3.4.3.1 Afier 1 January 2002, the amount of power from Part I, 6.3.4 with an effective isolation transmitter/receiver
all new installations of a VDL aircrdt transmitter under all isolation of 69 dB. Better transmitter and receiver
operating conditions when measured over a 16 kHz channel performance could reszllr in less isolation required. Guidunce
bandwidth centred on the tirst adjacent channel shall not muteriul on the measurement technique is included in
exceed minus 18 dBm. Annex 10, Volume I.: Attachnzent A, section 7.
6.3.4.4 After 1 January 2005, all VDL aircraft 6.3.5.3.2 After 1 January 2005, the receiving function of
transmitters shall meet the provisions of 6.3.4.1.1, 6.3.4.2.1, all installations of VDL shall meet the provisions of 6.3.5.3.1,
6.3.4.2.2 and 6.3.4.3.1, subject to Lhe conditions of 6.3.4.5. subject to the conditions of 6.3.5.3.3.
6.3.4.5 Requirements of mandatory compliance of the 6.3.5.3.3 Requirements of mandatory compliance of the
provisions of 6.3.4.4 shall be made on the basis of regional air provisions of 6.3.5.3.2 shall be made on the basis of regional
navigation agreements which specify the airspace of operation air navigation agreements which specify the airspace of
and the implcmentation timescales. The agreements shall operation and Lhe implamentatinn timescales. The agreement
provide at least two years' notice of mandatory compliance of shall provide for at least two years' notice of mandatory
aircraft systems. compliance of aircraft systems.
6.3.5 Receiving function 6.3.5.4 INTERFERENCE
IMMUNITY PERFORMANCE
6.3.5.1 Spec@ed error rate. The specified error rate for
Mode 2 operation shall be the maximum corrected Bit Error 6.3.5.4.1 The receiving function shall satisfy the specified
Ra~e(B ER) of 1 in lo4. The specified error rate for Mode 3 emor rate with a desired field strength of not more than 40
operation shall be the maximum uncorrected BER of 1 in lo3. microvolts per metre, and with one or more ~ u t - ~ f - b ~ ~ d
The specified error rate for Mode 4 operation shall be the signals, except for vHF FM broadcast signals, having a total
maximum uncorrected BER of 1 in lo4. level at the receiver input of minus 33 dBm.
Note.- The above physicul layer BER requirements ure Note.- In areas where adjacent higher band signal
derived from the BER imposed by ATN at the interference exceeds this spec@cation, u higher immunity
subnetwork intevace. requirement will apply.
6.3.5.2 Sensitivity. The receiving function shall satisfy the 6.3.5.4.2 The receiving function shall satisfy the specified
specified error rate with a desired signal strength of not more rate with a desired field strEngth ,f not more than 40
than 20 microvolts per metre (minus 120 ~ B W I ~ ~ ) . microvolts per metre, and with one or more VHF FM
broadcast signals having a total level at the receiver input of
Note.- The required signal strength at the edge of the minus 5 d ~ ~ .
service volume takes into account the requirements of' the
system und signal losses within the system, and considers
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