Federal Communications Commission § 97.307

Wavelength Standards see ¤ 97.307(), para- band Frequencies Emission types authorized graph:

13 cm Entire band ...... MCW, phone, image, RTTY, data, , test, pulse .... (7), (8), and (12). SHF: 9 cm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). 5 cm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). 3 cm Entire band ...... MCW, phone, image, RTTY, data, SS, test ...... (7), (8), and (12). 1.2 cm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). EHF: 6 mm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). 4 mm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). 2.5 mm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). 2 mm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). 1mm Entire band ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12). — Above 300 GHz ...... MCW, phone, image, RTTY, data, SS, test, pulse .... (7), (8), and (12).

[54 FR 25857, June 20, 1989; 54 FR 39536, Sept. 27, 1989; 55 FR 22013, May 30, 1990, as amended at 55 FR 30457, July 26, 1990; 60 FR 15688, Mar. 27, 1995; 64 FR 51471, Sept. 23, 1999]

§ 97.307 Emission standards. power of the fundamental. For a trans- mitter having a mean power of 25 or (a) No amateur station transmission less, the mean power of any spurious shall occupy more bandwidth than nec- emission supplied to the antenna trans- essary for the information rate and mission line must not exceed 25 µW and emission type being transmitted, in ac- must be at least 40 dB below the mean cordance with good amateur practice. power of the fundamental emission, but () Emissions resulting from modula- need not be reduced below the power of tion must be confined to the band or 10 µW. A transmitter built before April segment available to the control oper- 15, 1977, or first marketed before Janu- ator. Emissions outside the necessary ary 1, 1978, is exempt from this require- bandwidth must not cause splatter or ment. keyclick interference to operations on (f) The following standards and limi- adjacent frequencies. tations apply to transmissions on the () All spurious emissions from a sta- frequencies specified in § 97.305(c) of tion transmitter must be reduced to this part. the greatest extent practicable. If any (1) No angle-modulated emission may spurious emission, including chassis or have a modulation index greater than 1 power line radiation, causes harmful at the highest modulation frequency. interference to the reception of an- (2) No non-phone emission shall ex- other radio station, the licensee of the ceed the bandwidth of a communica- interfering amateur station is required tions quality phone emission of the to take steps to eliminate the inter- same modulation type. The total band- ference, in accordance with good engi- width of an independent sideband emis- neering practice. sion (having B as the first symbol), or () The mean power of any spurious a multiplexed image and phone emis- emission from a station transmitter or sion, shall not exceed that of a commu- external RF power amplifier transmit- nications quality A3E emission. ting on a frequency below 30 MHz must (3) Only a RTTY or data emission not exceed 50 mW and must be at least using a specified digital code listed in 40 dB below the mean power of the fun- § 97.309(a) of this part may be trans- damental emission. For a transmitter mitted. The symbol rate must not ex- of mean power less than 5 W, the at- ceed 300 bauds, or for frequency-shift tenuation must be at least 30 dB. A keying, the frequency shift between transmitter built before April 15, 1977, mark and space must not exceed 1 kHz. or first marketed before January 1, (4) Only a RTTY or data emission 1978, is exempt from this requirement. using a specified digital code listed in () The mean power of any spurious § 97.309(a) of this part may be trans- emission from a station transmitter or mitted. The symbol rate must not ex- external RF power amplifier transmit- ceed 1200 bauds, or for frequency-shift ting on a frequency between 30–225 MHz keying, the frequency shift between must be at least 60 dB below the mean mark and space must not exceed 1 kHz.

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(5) A RTTY, data or multiplexed mitted. The authorized bandwidth is emission using a specified digital code 100 kHz. listed in § 97.309(a) of this part may be [54 FR 25857, June 20, 1989; 54 FR 30823, July transmitted. The symbol rate must not 24, 1989, as amended at 54 FR 39537, Sept. 27, exceed 19.6 kilobauds. A RTTY, data or 1989; 60 FR 15688, Mar. 27, 1995; 65 FR 6550, multiplexed emission using an unspec- Feb. 10, 2000] ified digital code under the limitations listed in § 97.309(b) of this part also may § 97.309 RTTY and data emission codes. be transmitted. The authorized band- width is 20 kHz. (a) Where authorized by §§ 97.305(c) (6) A RTTY, data or multiplexed and 97.307(f) of the part, an amateur station may transmit a RTTY or data emission using a specified digital code emission using the following specified listed in § 97.309(a) of this part may be digital codes: transmitted. The symbol rate must not (1) The 5-unit, start-stop, Inter- exceed 56 kilobauds. A RTTY, data or national Telegraph Alphabet No. 2, multiplexed emission using an unspec- code defined in International Tele- ified digital code under the limitations graph and Telephone Consultative listed in § 97.309(b) of this part also may Committee Recommendation F.1, Divi- be transmitted. The authorized band- sion C (commonly known as Baudot). width is 100 kHz. (2) The 7-unit code specified in Inter- (7) A RTTY, data or multiplexed national Radio Consultative Com- emission using a specified digital code mittee Recommendation CCIR 476–2 listed in § 97.309(a) of this part or an un- (1978), 476–3 (1982), 476–4 (1986) or 625 specified digital code under the limita- (1986) (commonly known as AMTOR). tions listed in § 97.309(b) of this part (3) The 7-unit code defined in Amer- may be transmitted. ican National Standards Institute X3.4– (8) A RTTY or data emission having 1977 or International Alphabet No. 5 de- designators with A, B, C, D, E, F, , , fined in International Telegraph and or as the first symbol; 1, 2, 7 or 9 Telephone Consultative Committee as the second symbol; and D or W as Recommendation .50 or in Inter- national Organization for Standardiza- the third symbol is also authorized. tion, International Standard ISO 646 (9) A station having a control oper- (1983), and extensions as provided for in ator holding a Novice or Technician CCITT Recommendation T.61 (Malaga- Class operator license may only trans- Torremolinos, 1984) (commonly known mit a CW emission using the inter- as ASCII). national Morse code. (4) An amateur station transmitting (10) A station having a control oper- a RTTY or data emission using a dig- ator holding a Novice Class operator li- ital code specified in this paragraph cense or a Technician Class operator li- may use any technique whose technical cense and who has received credit for characteristics have been documented proficiency in telegraphy in accordance publicly, such as CLOVER, G–TOR, or with the international requirements PacTOR, for the purpose of facilitating may only transmit a CW emission communications. using the international Morse code or (b) Where authorized by §§ 97.305(c) phone emissions J3E and R3E. and 97.307(f) of this part, a station may (11) Phone and image emissions may transmit a RTTY or data emission be transmitted only by stations located using an unspecified digital code, ex- in ITU Regions 1 and 3, and by stations cept to a station in a country with located within ITU Region 2 that are which the United States does not have an agreement permitting the code to be west of 130° West longitude or south of used. RTTY and data emissions using 20° North latitude. unspecified digital codes must not be (12) Emission F8E may be trans- transmitted for the purpose of obscur- mitted. ing the meaning of any communica- (13) A data emission using an unspec- tion. When deemed necessary by an EIC ified digital code under the limitations to assure compliance with the FCC listed in § 97.309(b) also may be trans- Rules, a station must:

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