jgpo@iwu1c.UUCP (06/24/83)
As a result of WARC 79, the very familiar signals of the emissions modes
will be changed. The FCC will be implementing the following new symbols
over the next several years.
Old Symbol New Symbol Old Symbol New Symbol
A0 N0N F0 N0N
A1 A1A F1 F1B
A2 A2A F2 F2A
A2D F2D
A2J J2A F3 F3E
J2D F4 F3C
A3 A3E F5 F3F
A3J J3E P P1B
A4 A3C
A5 C3F
A3F
Symbol Explanation:
First character indicates emission type
Second character indicates the nature of the signal
Third character indicates the type of information transmitted
First Character
N = Unmodulated carrier
A = Double sideband AM
J = Single sideband, suppressed carrier
F = Frequency modulation
P = Sequence of unmodulated pulses
C = Vestigial sidebands
Second Character
0 = No modulating signal
1 = Single channel containing digital information without the use
of a modulating subcarrier
2 = Same as above, except using a modulating subcarrier
3 = Single channel containing analog information
Third Character
N = No information transmitted
A = Telegraphy -- aural reception
B = Telegraphy -- automatic reception
C = Facsimile
D = Data transmission, telemetry, telecommand
E = Telephony
F = Television
Example: A1A is double sideband, single channel containing digital
information without the use of a modulating subcarrier, telegraphy
for aural reception. In other words, CW!
Tnx to Bill, WD9BBI for the above information. Isn't progress wonderful?
73,
John, KA9MNK