terça-feira, 28 de agosto de 2012

Qual é a Designação de Emissão nos modos D-Star.?

A designação oficial dos novos Modos de comunicação para emissões em
D-Star, reconhecidas pela União Internacional das Telecomunicações
(UIT / ITU), são as seguintes:
Modo DV: 6K00F7W
(modo DV (Voz Digital):
6K00 = largura da faixa de sinal, 6kHz
F = Modulação de Frequência
7 = Mais do que um canal contem informação digital
W = Combinação de diferentes tipos : voz, dados, etc)
Modo DD: 150KF1D
(modo DD (Dados Digitais):
150K = Largura da faixa de sinal, 150kHz
F = Modulação de Frequência
1 = Somente um canal contem informação Digital
D = Transmissão de dados sem emprego de uma sub portadora modulante)
O Modo DD somente poderá ser utilizado em 1,2 GHz.
Fonte: The ITU Emission Designation agreed system for classifying
radio frequency signals.

International Telecommunication Union uses an internationally agreed
system for classifying radio frequency signals. Each type of radio
emission is classified according to its bandwidth, method of
modulation, nature of the modulating signal, and type of information
transmitted on the carrier signal. It is based on characteristics of
the signal, not on the transmitter used.
An emission designation is of the form BBBB 123 45, where BBBB is the
bandwidth of the signal, 1 is a letter indicating the type of
modulation used, 2 is a digit representing the type of modulating
signal, 3 is a letter corresponding to the type of information
transmitted, 4 is a letter indicating the practical details of the
transmitted information, and 5 is a letter that represents the method
of multiplexing. The 4 and 5 fields are optional.
[BBBB] Bandwidth
The bandwidth is expressed as three digits and a letter that occupies
the position normally used for a decimal point. The letter indicates
what unit of frequency is used to express the bandwidth. H indicates
hertz, K indicates kilohertz, M indicates megahertz, and G indicates
gigahertz. For instance, "500H" means 500 Hz, and "2M50" means 2.5
MHz.
[1] Type of modulation
N       Unmodulated carrier
A       Double-sideband amplitude modulation (e.g. AM broadcast radio)
H       Single-sideband with full carrier (e.g. as used by CHU)
R       Single-sideband with reduced or variable carrier
J       Single-sideband with suppressed carrier (e.g. Shortwave
utility and amateur stations)
B       Independent sideband (two sidebands containing different signals)
C       Vestigial sideband (e.g. NTSC)
F       Frequency modulation (e.g. FM broadcast radio)
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 (e.g. as used by WWVB)
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
[2]Type of modulating signal
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
[3]Type of transmitted information
N       No transmitted information
A       Aural telegraphy, intended to be decoded by ear, such as Morse code
B       Electronic telegraphy, intended to be decoded by machine
(Radioteletype digital modes)
C       Facsimile (Still images)
D       Telemetry or Telecommand (Remote control or data collection)
E       Telephony (voice or music intended to be listened to by a human)
F       Video (television signals)
W       Combination of any of the above
X       None of the above
[4]Details of information
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
[5]Multiplexing
N       None used
C       Code-division (excluding spread spectrum)
F       Frequency-division
T       Time-division
W       Combination of Frequency-division and Time-division
X       None of the above
João Costa (CT1FBF)
___________________________________-
Message: 7
Date: Tue, 28 Aug 2012 10:00:06 +0100
From: João Costa > CT1FBF <ct1fbf@gmail.com>
Subject: ARLA/CLUSTER: Qual é a Designação de Emissão nos modos
        D-Star.?
To: Cluster-ARLA <cluster@radio-amador.net>
Message-ID:
       

SX5YVP=6fxR2K1j1Gt888_TZ0w@mail.gmail.com>
Content-Type: text/plain; charset=UTF-8

Nenhum comentário:

Postar um comentário