Lecture
Table A1.1 – Type of modulation of the main carrier
|
Emission not modulated |
N |
|
Emission with amplitude modulation: |
|
|
– double sideband, full carrier |
A |
|
– single sideband, full carrier |
H |
|
– single sideband, reduced carrier |
R |
|
– single sideband, suppressed carrier |
J |
|
– vestigial sideband |
C |
|
Emission with frequency modulation |
F |
|
Emission with phase modulation |
G |
|
Emission with pulse modulation: |
|
|
– sequence of unmodulated pulses |
P |
|
– sequence of amplitude-modulated pulses |
K |
|
L |
|
M |
Table A1.2 – Signal modulating the main carrier:
|
– no modulating signal |
0 |
|
– one channel of quantized or digital information without the use of a modulating audio frequency |
1 |
|
– one channel of analogue information (telephony, including broadcasting) |
3 |
|
– television (video) |
5 |
Table A1.3 – Type of information transmitted:
|
– no information transmitted |
N |
|
– telegraphy, for aural reception |
A |
|
– telegraphy, for automatic reception |
B |
|
– telephony, including sound broadcasting |
E |
|
– television (video signal) |
F |
Table A1.4 – Broadcast quality sound:
|
– monophonic |
G |
|
– stereophonic or quadraphonic |
H |
|
– colour television |
N |
|
– combinations of the above cases |
W |
Table A1.5 – Nature of multiplexing:
|
no multiplexing |
N |
|
– frequency |
F |
|
– time |
T |
|
– code |
C |
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