ANNEX 1
Use of the
decibel and the neper
1
Definition
of the decibel
2
Definition
of the neper
3
Use
of the decibel and neper
4
Rules
for the use of the symbols where dB is included
4.1
The
symbol dB without additional indication
4.2
The
symbol dB followed by additional information within parenthesis
4.3
The
symbol dB followed by additional information without parenthesis
5
Loss
and gain
5.1
Transmission
loss
5.2
Antenna
gain
6
Levels
6.1
Absolute
power level
6.2
Relative
power level and related concepts
6.2.1 Definition
6.2.2 Transmission reference point (see ITU-T Recommendation
G.101)
6.2.3 Meaning of “dBm0”
6.3
Power
density
6.4
Absolute
power density level
6.5
Absolute
voltage level
6.6
Audio
frequencies
6.6.1 Absolute audio-frequency noise level
6.6.2 Relative voltage levels
6.6.3 Use of the decibel, by extension, for ratios of
quantities not connected with power
6.7
Absolute
level of an electromagnetic field
6.8
Sound
pressure level
7
Ratios
expressing transmission quality
7.1
Signal-to-noise
ratio
7.2
Protection
ratio
7.3
Carrier
to spectral noise density ratio (C / N0)
7.4
Energy
to spectral noise density ratio
7.5
Figure
of merit (M)
8
Special
notations
APPENDIX 1
Notation
for expressing the reference of a level