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on all the P channels it supports. In addition, the GES shall
transmit the complete sequence on each satellitetbeamidentifying
P,,, channel it supports. Each GES in a satellite
service area shall transmit to each of its logged-on AESs all
partial sequences due to any update made by any GES in the
satellite service area.
4.10.4.5.2.7 The partial sequence shall be transmitted
twice as often as the complete sequence.
Note.- The selective release broadcast LIDU is used to
command all logged-on AESs to cease transmission on
specified L-band frequency(ies).
4.10.4.5.3.1 The GES management shall send one or
more selective release broadcast LIDUS to the AES upon
occurrence of either of the following events:
a) request to release certain channels;
b) for circuit-mode calls, if the in-band channel clearing
facilities (such as the channel release signalling facility
on the sub-band C chmel) are ineffective.
4.10.4.5.4 Recommendation.- The GES management
should broadcast the system time to the AES following an AES
log-on by transmitting the system time broadcast LZDU on all
P channels. The time in the system time broadcast LIDU
should be the predicted time of reception at an AES of theJirst
bit of the next supelframe of the relevant P channel.
4.1 0.5 Satellite system
management
At least one satellite/beam-identifying P,,, channel shall be
active at all times for each beam that supports a satelliteheamidentifying
P,,, chamel.
Part I Annex 10 - Aeronautical Telecommunications
TABLES FOR CHAPTER 4
Table 4-1. Received phase noise mask
Offset from carrier Phase noise
(Hz) (dBc)
1. Phase noise is measured single sideband relative to carrier.
2. The mask shall be defined by drawing straight lines through the above
points on a graph which is logarithmic in frequency.
Note.- This musk is illustrated in the guidance material contained in
Attachment A to Pan I of Annex 10, Volume III.
Table 4-2. P channel acquisition carrier-to-noise levels
Channel rates C/No Nominal channel
(bitds) (dB-%) spacing (kHz)
Armex 10 - Aeronautical Telecommunications Volume ZZZ
Table 4-3. Maximum out-of-band EIRP density levels
1 Frequency (MHz) EIRP density I
-135 dBd4 kHz
-203 dBcI4 kHz
-135 dBd4 kHz
-155 dBc/l MHz
-105 dBc/4 kHz
-105 dBc/l MHz
-85 dBc/l MHz
-55 dBc/4 kHz
-55 dBcl4 kHz
,-I05 dBc/4 kHz
-70 d B ~ l 4kH z
Table 4-4. Transmitted phase noise mask
Offset from carrier Phase noise
(Hz) (dBc)
10 -40
100 -67
500 -72
1 100 -80
X -80
I . Phase noise is measured single sideband relative to carrier.
2. The mask shall be defined by drawing straight lines through the above points on a graph
which is logarithmic in frequency.
3. X is equal to 35 kHz or four times the symbol rate, whichever is less.
4. Where discrete spectral components exist, the sum of the discrete phase noise components and
continuous spectral component averaged over a bandwidth of *10 Hz on either side of the
discrete component shall not exceed the phase noise mask.
Nore.- This musk is illusrrared in the guidnnce material contained in Attachment A to Part I
of Annex 10, Volume III.
Annex 10 - Aeronautical Telecommunications
Table 4-5. Required spectrum limits for AES transmissions
I Frequency offset
Attenuation (dB)
(relative to maximum envelope level) I
k2.80 SR
35 kHz
1. The mask shall be defined by drawing straight lines through the above points.
2. The symbol rate, SR, is equal to the channel rate for A-BPSK, and is half the channel
rate for A-QPSK.
Table 4-6. Required spectral limits for A-BPSK received by AES
I Upper bound I Lower bound I
Amplitude response Amplitude response
Normalized frequency (dB) 1 Normdired frequency (dB)
1. The mask shall bc defined by drawing straight lines through the above points where frequencies are normalized to
the channel rate, and the amplitude is normalized to 0 dB at a frequency of 0.
2. X is equal to 35 kHz. For larger frequency offsets the spurious requirements of 4.2.3.5.6 apply.
Note.- This mask is illustrated in the guidance material contained in Attachmen1 A to Part 1 of Annex 10,
Volume III.
Annex 10 - Aeronauticul Telecommunications
Table 4-7. Required spectral limits for A-QPSK received by AES
Upper bound
Amplitude response
Normalized frequency (dB)
-X -40
-0.625 -40
-0.5 -20
-0.425 -10
-0.375 -6
-0.275 -3
-0.175 - 1
-0.075 0.25
0.075 0.25
0.175 -1
0.275 -3
0.375 -6
0.425 -10
0.5 - 20
0.625 -40
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