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TABLE OF AUTHORIZED EMISSIONS IN THE AMATEUR SERVICE
Effective May 22, 1983 **
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Novice/Technician General/Advanced Extra
A1 emission only A1 and F1 A1 and F1
3700 - 3750 3525 - 3775 3500 - 3775
7100 - 7150 7025 - 7150 7000 - 7150
21100 - 21200 10100 - 10109 10100 - 10109
28100 - 28200 10115 - 10150 10115 - 10150
14025 - 14150 14000 - 14150
21025 - 21250 21000 - 21250
28000 - 28500 28000 - 28500
NOTE: 250 watts max input in Novice subbands and 30 meters.
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General Advanced Extra
A1, A3, A4, A5, F3, F4, F5
3890 - 4000 3800 - 4000 3775 - 4000
7225 - 7300 7150 - 7300 7150 - 7300
14225 - 14350 14175 - 14350 14150 - 14350
21350 - 21450 21270 - 21450 21250 - 21450
28500 - 29700 28500 - 29700 28500 - 29700
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160 Meters (Illinois) A1 and A3 only
KHz Day power Night power
1800 - 1900 1000 1000
1900 - 1925 500 100
1925 - 1975 100 25
1975 - 2000 500 100
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6 and 2 Meters: General/Advanced/Extra
50.0 - 50.1 A1 only
51.0 - 54.0 A0, A1, A2, A3, A4, A5, F1, F2, F3, F4, F5
50.1 - 54.0 A1, A2, A3, A4, A5, F1, F2, F3, F4, F5
144.0 - 144.1 A1 only
144.1 - 148.0 A0, A1, A2, A3, A4, A5, F0, F1, F2, F3, F4, F5
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The bandwidth of an F3 emission below 29 MHz shall not
exceed that of an A3 emission.
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.PA
?________________________________________________________________
The "Considerate Operators Frequency Guide"
(Frequencies generally recognized for certain activities)
1800 - 1825 cw only 14.08 - 14.10 RTTY
1825 - 1830 dx window 14.23 SSTV
1850 - 1855 dx window 21.09 - 21.10 RTTY
3610 - 1630 RTTY 21.34 SSTV
3637.5 AMTOR 28.09 - 28.10 RTTY
3845 SSTV 28.68 SSTV
7090 - 7100 RTTY 29.30 - 29.50 SATELLITES
7171 SSTV 29.52 - 29.58 RPTR inputs
10.14-10.15 RTTY 29.60 FM simplex
14.075 AMTOR 29.62 - 29.68 RPTR outputs
____________________________________________________________________
** 20 meter phone expansion effective May 22, 1983
AMTOR effective Jan 22, 1983
____________________________________________________________________
DIGITAL COMMUNICATIONS: (F1, 3.5-28 MHz)(A2, F1, F2 above 28 MHz)
BAUDOT: (International Alphabet #2)
A2, F1, F2: Maximum frequency shift = 900 Hz
A2, F2: Highest modulating frequency = 3000 Hz.
Maximum speed = 100 wpm (75 baud).
ASCII: Maximum baud rates:
3.5 - 28 MHz = 300 baud
28 - 50 MHz = 1200 baud
50 - 220 MHz = 19600 baud
220 - up = 56000 baud
AMTOR: TOR specifications are found in CCIR Rec. 476-2.
(100 baud, Block rep rate 2.222/sec.)
OTHER DIGITAL CODES: (ABOVE 50 MHZ ONLY):
Any other digital code may be used above 50 MHz
in the domestic U.S. (Except where A1 only is
permitted). A description of the code and modu-
lation technique must be kept in the log.
Bandwidth limitations:
50 - 220 MHz = 20 kHz max.
220 - 1215 MHz = 100 kHz max.
1215 and up = any Bw if in accordance with
97.63(b) and 97.73(c).
NOTE: When any digital communications are used, ID must
be given by voice or CW, whichever is appropriate.
.PA
?FACSIMILIE and TELEVISION:
Below 50 MHz the bandwidth of A4, A5, F4, F5 must not
exceed that of an A3 SSB signal.
50 to 225 MHz:
The bandwidth of A4 and A5 SSB emissions must not exceed
that of A3 SSB emissions.
The bandwidth of A4 and A5 DSB emissions must not exceed
that of A3 DSB emissions.
Type F4 and F5 emissions shall be limited to a peak
deviation of 5 KHz with a maximum modulating frequency
of 3 KHz. Alternatively, the bandwidth shall be no
greater than 20 KHz.
Below 225 MHz, type A4 and A3 or type A5 and A3
emissions are allowed simultaneously on the same
frequency if the bandwidth is no greater than type
A3 DSB.
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The present complete emission types are given in the format:
"Numeral, Letter, Numeral, Letter". The first numeral
indicates the bandwidth of the signal. This is often not
shown (and really should be for an accurate description).
The first letter shows the type of main carrier modulation.
The second numeral indicates the type of modulating signal
(voice, TV, CW, etc). The suffix letter, also not always
shown, basically indicates carrier and sideband type
information (full carrier or supressed, SSB or DSB etc).
The following list is not complete, does not show pulse
modes, and does not mean that all these can be used by the
amateur.
TYPE DESCRIPTION NOTE
(Amplitude Modulation)
A0 carrier - no modulation
A1 on-off telegraphy #1
A2 amplitude modulated telegraphy #1,2
A3 DSB (full carrier telephony)
A3A SSB (reduced carrier telephony)
A3B (2 independent sidebands -
reduced carrier) #3
A3J SSB (supressed carrier telephony)
A4 DSB facsimile
A4A SSB facsimile, reduced carrier
A4J SSB facsimile, supressed carrier
A5 DSB television
A5C VSB television #4
? (Frequency modulation)
F0 carrier - no modulation
F1 frequency shift telegraphy #1
F2 frequency modulated telegraphy #1,2
F3 telephony
F4 facsimile
F5 television
---------------------Notes--------------------------
1. This is not restricted to Morse - may be RTTY, for example.
(RTTY could be run on 160 meters if on-off keying of the
carrier is used).
2. Examples of this mode are: 1) Carrier keyed on/off 2)
carrier on with the modulation keyed on/off 3) carrier on
with the modulation frequency shift keyed.
3. This is used by short wave broadcast station studio to
transmitter links with separate programs on each set of
sidebands.
4. VSB = Vestigial sideband where all of one set of sidebands
is transmitted but only about 20 percent of the other set of
sidebands is transmitted (the lowest frequencies).
_____________________________________________________________
Common Amateur emissions:
Double sideband voice = 6A3
Single sideband voice = 3A3J
VHF FM voice = 16F3
25 wpm Morse cw = .1A1
(assume max modulating freq of 3KHz and max deviation of 5KHz)
______________________________________________________________
Bandwidths are found with the following formulae:
A1 Bw = BK K=5 for fading circuits)
A2 Bw = BK+2M
A3 Bw = 2M
A3J Bw = M
A4 Bw = KN+2M (K=1.5)
F1 Bw = 2.6D+.55B (when 2D/B is less than 5.5)
Bw = 2.1D+1.9B (when 2D/B is greater than 5.5)
F3 Bw = 2M+2DK (K=1)
F4 Bw = KN+2M+2D (K=1.5)
.PA
? WHERE:
Bw = necessary bandwidth in Hz
B = speed in bauds
C = subcarrier freq. in Hz
D = 1/2 the diff. between max and min instantaneous
freq (in other words, peak deviation).
K = fudge factor
M = maximum modulating freq. in Hz
N = maximum black & white elements per second
(N = drum circumference x lines per unit length
x drum rps)
____________________________________________________________
The May 1983 issue of Popular Communications magazine lists
the following HF frequencies for Space Shuttle related moni-
toring:
2.622 NASA booster rocket recovery
3.385 NASA tracking
3.395 NASA tracking
5.190 NASA tracking vessels
5.810 NASA booster recovery vessels
6.708 NASA aircraft
6.896 NASA aircraft
6.983 NASA tracking
7.461 NASA aircraft
7.675 NASA Kennedy operations
7.765 NASA aircaft
10.780 USAF "Cape Radio" (primary)
11.205 NASA Pacific operations
11.407 NASA booster rcoket recovery
14.456 NASA tracking
20.186 NASA tracking (Ascension Island)
20.191 NASA tracking (Ascension Island)
20.390 USAF "Cape Radio" (secondary)
Other VHF, UHF, and microwave frequencies are listed in this
article on pages 38 and 39.
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Bob Parnass, AT&T Bell Laboratories - ihnp4!ihuxf!parnass - (312)979-5414