ARLA/CLUSTER: Código da Classificação das Emissões.

[João Gonçalves Costa]

Quando se fala de emissões em A1A, A3E, J3E ou F3E quanto sabem, ou deveriam saber exactamente, ao que nos estamos a referir;

Emission Classification
What are they?

Emission classification coding is designed to provide an internationally recognised way of describing the essential characteristics of a radio frequency transmission

How are they written?

Emission codes are usually written in the form XXXX 12345, where;

 *   XXXX is used to describe the bandwidth. For example 750H means 750 Hz, and 2K50 means 2.5KHz
 *   12345 is used to describe the other 5 characteristics listed below. Note that characteristics 4 and 5 are optional and are frequently missing from emission codes.

 *   1 Modulation of the main carrier
 *   2 The nature of the signals modulating the main carrier
 *   3 The type of information being transmitted
 *   4 Details of signals
 *   5 Nature of multiplexing


Carrier modulation
N       Unmodulated carrier
A       Double-sideband amplitude modulation
H       Single-sideband with full carrier
R       Single-sideband with reduced-carrier or variable carrier
J       Single-sideband with suppressed carrier
B       Independent sideband (two sidebands containing different signals)
C       Vestigial sideband e.g. NTSC
F       Frequency modulation
G       Phase modulation
D       Combination of AM and FM or PM
P       Sequence of pulses without modulation
K       Pulse amplitude modulation
L       Pulse width modulation
M       Pulse position modulation
Q       Sequence of pulses, phase or frequency modulation within each pulse
V       Combination of pulse modulation methods
W       Combination of any of the above
X       None of the above
Nature of modulating signals
0       No modulating signal
1       One channel containing digital information, no subcarrier
2       One channel containing digital information, using a subcarrier
3       One channel containing analogue information
7       More than one channel containing digital information
8       More than one channel containing analogue information
9       Combination of analogue and digital channels
X       None of the above
Type of information being transmitted
N       No transmitted information
A       Aural telegraphy, intended to be decoded by ear, such as Morse code<http://amateur-radio-wiki.net/index.php?title=Morse_code>
B       Electronic telegraphy, intended to be decoded by machine ; Radioteletype and digital modes
C       Facsimile
D       Telemetry or Telecommand
E       Telephony (voice)
F       Video ; television signals
W       Combination of any of the above
X       None of the above
Details of Signals
A       Two-condition code, elements vary in quantity and duration
B       Two-condition code, elements fixed in quantity and duration
C       Two-condition code, elements fixed in quantity and duration, error-correction included
D       Four-condition code, one condition per "signal element"
E       Multi-condition code, one condition per "signal element"
F       Multi-condition code, one character represented by one or more conditions
G       Monophonic broadcast-quality sound
H       Stereophonic or quadraphonic broadcast-quality sound
J       Commercial-quality sound (non-broadcast)
K       Commercial-quality sound-frequency inversion and-or "band-splitting" employed
L       Commercial-quality sound, independent FM signals, such as pilot tones, used to control the demodulated signal
M       Greyscale images or video
N       Full-color images or video
W       Combination of two or more of the above
X       None of the above
Nature of Multiplexing
N       None used
C       Code division multiplexing
F       Frequency division multiplexing
T       Time division multiplexing
W       Combination of Frequency-division and Time-division
X       None of the above
Commonly used Ham Radio emission characteristics

Table 1 - Commonly used emission characteristics

Transmission mode
        Emission mode coding examples
        AM      SSB     FM      PM

Morse   A1A
A1B     J2A
J2B     F1B
        G1B

Speech  A3E     J3E     F3E     G3E
Data (packet)   A2D
A1D     J2D
        FID
F2D     G1D
G2D
RTTY    A2D     J2D     F2D     G2D
Facsimile       A2C     J2C     F2C     G2F
FSTV    C3F
A3F     J3F
        F3F
        G3F

SSTV    A2F
        J2F
J3F     F2F
F3F     G2F
G3F


Fonte: Amateur Radio Wiki
-------------- próxima parte ----------
Um anexo em HTML foi limpo...
URL: http://radio-amador.net/pipermail/cluster/attachments/20100602/e4af729c/attachment.html