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Nsing DSB-AM madU1ation is JprCIFedi n wumz1e4 hrrzz transmitter under all operating conditions when measured over
Chapter 2 for 25 kHz channel spacing. a 16 kHz channel bandwidth centred on the first adjacent
channel shall not exceed minus 20 dBm.
6.2.2 Power 6.2.4.3.1 After 1 January 2002, the amount of power from
Recommendation.- The effective radiated power should all new installations of a ~L transmitter under ail operating
be such as to provide a$eld strength of at least 75 microvolts conditions when measured over a 16 kHz channel bandwidth
per mette (minus 109 dl!w/m2) within the defined operutional centred on the first adjacent channel shall not exceed minus
coverage of the facilio, on the basis of free-space propagation. 18 dBm.
6.2.3 Spurious emissions
6.2.3.1 Spurious emissions shall be kept at the lowest
value which the state of the technique and the nature of the
service permit.
Nore.- Appendix 8 to the Radio Rcglilations contains rhe
tolerances for the levels of spurious emissions to which
rrunsrnitters nrust conform in accordunce with Radio
Regrilariort 304.
6.2.4.4 After 1 January 2005, all VDL ground transmitters
shall meet the provisions of 6.2.4.1.1, 6.2.4.2.1,
6.2.4.2.2 and 6.2.4.3.1, subject to the conditions of 6.2.4.5.
6.2.4.5 Rcquirernents of mandatory compliance of the
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.
2fIUMI
No. 75
Annex 10 - Aerotlautical Telecommunications
6.3 SYSTEM CHARACTERISTICS OF
THE AIRBORNE; INSTA1,LATION
6.3.1 Frequency sfabiliv. The radio frequency of VDL
airborne equipment shall not vary more than plus or minus
0.0005 per cent (5 parts per million) from the assigned
frequency.
Note.- The frequency stability for VDL airborne stations
using DSB-AM modulation is specified in Volumc III. Part 11,
Chapter 2 for 25 kHz channel spacing.
operating conhtions 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.
6.3.4.3 The amount of power from a VDL airborne
transmitter under all operating conhtions when measured over
a 16 kHz channel bandwidth centred on the first adjacent
channel shall not exceed minus 20 dBm.
6.3,4.3.1 After 1 January 2002, the amount of power from
6.3.2 Power: The effective radiated power shall be such as new installations of a VDL airborne under all.
provide a svength of at lewt 20 microvOhs per mewe qerating when over 16 mz channel
(minus 120 dBw1m2) On the basis of free 'pace propagation^ bandwid* cenked on the first shall not
at ranges and altitudes appropriate to the operational exceed minus 18 dBm.
conditions pertaining to the areas over which the aircraft is
operated.
6.3.3 Spurious emissions
6.3-4.4 After 1 January 2005, all VDL airborne transmitters
shall meet the provisions of 6.3.4.1.1, 6.3.4.2.1,
6.3.4.2.2 and 6.3.4.3.1, subject to the conditions of 6.3.4.5.
6.3.3.1 Spurious emissions shall be kept at the lowest 6.3.4.5 Requirements of mandatory compliance of the
value which the state of the technique and nature of service provisions of 6.3.4.4 shall be made on the basis of regional air
permit. navigation agreements which specify the airspace of operation
and the implementation timescales. The agreements shall
~ o t ~ .A-p pendix 8 to the R & ~ Regufarions contains the provide at least two years' notice of mandatary CofIIp~ianceo f
tolerances for the levels of spurious ernissio~i to which airborne systems.
transmitters must conform irl accordance with Rudio
Regulation 304.
6.3.5 Receiving function
6.3.4 Adjacent channel emissions 6.3.5.1 Specified error rate. The specified error rate shall
be the maximum corrected Bit Error Rate of 1 in lo4.
6.3.4.1 The amount of power from a VDL airborne
transmitter under all operating conditions when measured over 6.3.5.2 Sensiriviry. The receiving function shall satisfy the
the 25 channel baridwidth of the first adjacent channel specified enor rate with a desired signal strength of not more
shall not exceed 0 dBm. than 20 microvolts per metre (minus 120 d ~ ~ l m " ) .
6.3.4.1.1 After 1 January 2002, the amount of power from Note.-- Tlre required signal strength at rhc edge of the
all new installations of a VDL airborne transmitter under all
rcquinmmts of
'perating conditions when measured Over the lrHz losses the r)srem and consjderr
　
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