The maximum bandwidth for a data emission on 60 meters is 2.8 kHz.

Amateurs are not the primary users on the 60 meter band so operation on 60 meters is restricted to five 2.8 kHz wide channels centered on

• 5332 kHz,
• 5348 kHz,
• 5368 kHz,
• 5373 kHz, and
• 5405 kHz

...with USB, data, and CW signals.

Silly Tip: Question asks for MAXIMUM bandwidth and the answer is the HIGHEST frequency of answers.

Additional tip: around 2.5-3kHz is the typical bandwidth used for speech, so is a pretty common answer, even when (as in this question) actually transmitting data rather than voice.

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Business-related messages are never allowed to be sent over amateur radio, even if it's for a non-profit organization.

Communications incidental to the purpose of the amateur service and remarks of a personal nature are always welcome on amateur radio, so this should generally be the most obvious choice -- good thing it's the correct one.

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§97.303 Frequency sharing requirements.

(g)(2) Prior to commencement of operations in the 135.7-137.8 kHz (2200 m) and/or 472-479 kHz (630 m) bands, amateur operators shall notify the Utilities Telecom Council (UTC) of their intent to operate by submitting their call signs, intended band or bands of operation, and the coordinates of their antenna's fixed location. Amateur stations will be permitted to commence operations after the 30-day period unless UTC notifies the station that its fixed location is located within one kilometer of PLC (power-line carrier) systems operating in the same or overlapping frequencies.

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International Amateur Radio Permit (IARP) is for operation in certain countries of the Americas (see below for list) and allows US amateur radio operators to operate without seeking a special license or permit to operate from that country. For a US citizen to operate an amateur station in a CITEL country, an IARP is necessary and may be issued by a member-society of the International Amateur Radio Union (IARU)--for the US, the American Radio Relay League (ARRL). The permit lists its authority in four different languages.

See http://www.arrl.org/iarp

Participating IARP Countries: Argentina, Brazil, Canada, El Salvador, Panama, Paraguay, Peru, Trinidad and Tobago, United States of America, Uruguay, and Venezuela.

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Third Party Communications of an amatuer station are governed by Part 97.115.

This section of the code covers all the acceptable times when a station is allowed to transmit messages for a third party, however it limits these messages to having a control operator present except in the case of RTTY or data emissions.

97.115(c) - No station may transmit third party communications while being automatically controlled except a station transmitting a RTTY or data emission.

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http://www.arrl.org/files/file/Regulatory/DA-11-221A1.pdf

Therein: While operating an amateur station in a CEPT country, the person must have in his or her possession a copy of this Public Notice DA-11-221, proof of U.S. citizenship, and evidence of the FCC license grant. These documents must be shown to proper authorities upon request.

CEPT Country list: https://www.cept.org/cept/membership-and-observers

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Utilities Telecom Council notification/registration is required because of the use of Power-line Carrier systems on these frequencies and the potential for interference with PLC communication systems. The process for registration is simple though and can be done at https://utc.org/plc-database-amateur-notification-process/

The Regs:

§97.303 Frequency sharing requirements.

(g)(2) Prior to commencement of operations in the 135.7-137.8 kHz (2200 m) and/or 472-479 kHz (630 m) bands, amateur operators shall notify the Utilities Telecom Council (UTC) of their intent to operate by submitting their call signs, intended band or bands of operation, and the coordinates of their antenna's fixed location. Amateur stations will be permitted to commence operations after the 30-day period unless UTC notifies the station that its fixed location is located within one kilometer of PLC systems operating in the same or overlapping frequencies.

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Memory Trick: If your control link malfunctions, it cannot transmit more than 3 minutes. “3 strikes and you’re out!”

Real Answer: FCC 97.213(b)) Provisions are incorporated to limit transmission by the station to a period of no more than 3 minutes in the event of malfunction in the control link.

3M m on its side looks like the number 3. malfunction, minutes, m rotated

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Any modulation index greater than 1.0 will result in bandwidths that are wider than necessary for good amateur practices.

§ 97.307 Emission standards. (a) No amateur station transmission shall occupy more bandwidth than necessary for the information rate and emission type being transmitted, in accordance with good amateur practice. (b) Emissions resulting from modulation must be confined to the band or segment available to the control operator. Emissions outside the necessary bandwidth must not cause splatter or keyclick interference to operations on adjacent frequencies.

The definition of modulation index differs between AM and FM.

The AM Modulation Index is (\(m = \frac{M}{A}\)), where M = the peak CHANGE in modulated carrier AMPLITUDE from its UNMODULATED value, and A = the unmodulated carrier amplitude. A modulation index of 1 is when the envelope cycles between TWICE the steady state value (increases by 1X) and ZERO (decreases by 1X) .

With FM, the FM carrier FREQUENCY is modulated by some frequency spectrum, typically speech. The FM modulation index is (\(m = \frac{Fd}{A}\)), where Fd is the maximum deviation from the carrier frequency, and A is the highest audio frequency.

If the maximum deviation Fd of a signal, set by FCC standards at down 26 dB, is, say, 3 kHz on either side of the center freq (146.52 MHz, for example), and the modulating frequency A is speech low-pass filtered to 3 kHz, then the modulation index is (\(\frac{3000}{3000} = 1\)), right at the limit. If the transmitted signal had side bands that used, say, 5 kHz on either side of the carrier frequency, for the same 3 kHz audio stream, the MI would be (\(\frac{5000}{3000} = 1.67\)).

ARRL 2021 Handbook, Sect 11.3 Angle Modulation

SILLY HINT: 29 MHz is the 10 Metre band, answer is 1.0 (10)

For further reading: Wikipedia on modulation indexes

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§ 97.307 Emission standards.

For transmitters installed after January 1, 2003, the mean power of any spurious emission from a station transmitter or external RF power amplifier transmitting on a frequency below 30 MHz must be at least 43 dB below the mean power of the fundamental emission.

*Memory - The lowest number in the list -- W1SBC

*Silly Memory trick: date of 1/1/2003 think 1+1+2=4, 3 or 43--KI5ZAO

TEST TIP: "86'd" is a slang term meaning "to get rid of." The correct answer (43 dB) is half way to 86. FCC doesn't expect us to completely eliminate spurious emissions, so just think of the expectation as being "half way to 86'd".

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CEPT - European Conference of Postal and Telecommunications Administrations. C "European" PT

Hint: Usually not allowed, but they make exCEPTions.

Fun Fact, from Wikipedia:

The acronym comes from the French version of its name:

Conférence Européenne des administrations des Postes et des Télécommunications.

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Just another one of those "learn the regs" questions.

This one is covered in §97.305(c) Authorized emission types where RTTY, Data, Phone, and Image are all authorized for the entire 630m band.

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