§ 97.309 47 CFR Ch. I (10–1–96 Edition)

Class operator license may only trans- may use any technique whose technical mit a CW emission using the inter- characteristics have been documented national Morse code. publicly, such as CLOVER, –TOR, or (10) A station having a control opera- PacTOR, for the purpose of facilitating tor holding a Novice or Technician communications. Class operator license may only trans- () Where authorized by §§ 97.305() mit a CW emission using the inter- and 97.307() of this part, a station may national Morse code or phone emis- transmit a RTTY or data emission sions J3E and R3E. using an unspecified digital code, ex- (11) Phone and image emissions may cept to a station in a country with be transmitted only by stations located which the United States does not have in ITU Regions 1 and 3, and by stations an agreement permitting the code to be located within ITU Region 2 that are used. RTTY and data emissions using west of 130° West longitude or south of unspecified digital codes must not be 20° North latitude. transmitted for the purpose of obscur- (12) Emission F8E may be transmit- ing the meaning of any communica- ted. tion. When deemed necessary by an EIC (13) A data emission using an unspec- to assure compliance with the FCC ified digital code under the limitations Rules, a station must: listed in § 97.309(b) also may be trans- (1) Cease the transmission using the mitted. The authorized bandwidth is unspecified digital code; 100 kHz. (2) Restrict transmissions of any dig- [54 FR 25857, June 20, 1989; 54 FR 30823, July ital code to the extent instructed; 24, 1989, as amended at 54 FR 39537, Sept. 27, (3) Maintain a record, convertible to 1989; 60 FR 15688, Mar. 27, 1995] the original information, of all digital communications transmitted. § 97.309 RTTY and data emission codes. [54 FR 25857, June 20, 1989, as amended at 54 (a) Where authorized by §§ 97.305(c) FR 39537, Sept. 27, 1989; 56 FR 56172, Nov. 1, 1991; 60 FR 55486, Nov. 1, 1995] and 97.307(f) of the part, an amateur station may transmit a RTTY or data § 97.311 emission types. emission using the following specified digital codes: (a) SS emission transmissions by an (1) The 5-unit, start-stop, Inter- amateur station are authorized only national Telegraph Alphabet No. 2, for communications between points code defined in International Tele- within areas where the amateur service graph and Telephone Consultative is regulated by the FCC. SS emission Committee Recommendation F.1, Divi- transmissions must not be used for the sion C (commonly known as Baudot). purpose of obscuring the meaning of (2) The 7-unit code specified in Inter- any communication. national Radio Consultative Commit- (b) Stations transmitting SS emis- tee Recommendation CCIR 476–2 (1978), sion must not cause harmful inter- 476–3 (1982), 476–4 (1986) or 625 (1986) ference to stations employing other au- (commonly known as AMTOR). thorized emissions, and must accept all (3) The 7-unit code defined in Amer- interference caused by stations em- ican National Standards Institute X3.4– ploying other authorized emissions. 1977 or International Alphabet No. 5 de- For the purposes of this paragraph, un- fined in International Telegraph and intended triggering of carrier operated Telephone Consultative Committee repeaters is not considered to be harm- Recommendation .50 or in Inter- ful interference. national Organization for Standardiza- (c) Only the following types of SS tion, International Standard ISO 646 emission transmissions are authorized (1983), and extensions as provided for in (hybrid SS emissions transmissions in- CCITT Recommendation T.61 (Malaga- volving both spreading techniques are Torremolinos, 1984) (commonly known prohibited): as ASCII). (1) Frequency hopping where the car- (4) An amateur station transmitting rier of the transmitted signal is modu- a RTTY or data emission using a digi- lated with unciphered information and tal code specified in this paragraph changes frequency at fixed intervals

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under the direction of a high speed frequency or frequencies of operation code sequence. and, where applicable, the chip rate, (2) Direct sequence where the infor- the code rate, the spreading function, mation is modulo–2 added to a high the transmission protocol() including speed code sequence. The combined in- the method of achieving formation and code are then used to sychronization, and the modulation modulate the RF carrier. The high type; speed code sequence dominates the (3) A general description of the type modulation function, and is the direct of information being conveyed, (voice, cause of the wide spreading of the text, memory dump, facsimile, tele- transmitted signal. vision, etc.); () The only spreading sequences that (4) The method and, if applicable, the are authorized are from the output of frequency or frequencies used for sta- one binary linear feedback shift reg- tion identification; and ister (which may be implemented in (5) The date of beginning and the hardware or software). date of ending use of each type of (1) Only the following sets of connec- transmitted signal. tions may be used: (f) When deemed necessary by an EIC Number of stages in shift register Taps used in feedback to assure compliance with this part, a station licensee must: 7 ...... 7,1. 13 ...... 13,4, 3, and 1. (1) Cease SS emission transmissions; 19 ...... 19, 5, 2, and 1. (2) Restrict SS emission trans- missions to the extent instructed; and (2) The shift register must not be (3) Maintain a record, convertible to reset other than by its feedback during the original information (voice, text, an individual transmission. The shift image, etc.) of all spread spectrum register output sequence must be used communications transmitted. without alteration. (g) The transmitter power must not (3) The output of the last stage of the exceed 100 . binary linear feedback shift register must be used as follows: § 97.313 Transmitter power standards. (i) For frequency hopping trans- missions using frequencies, con- (a) An amateur station must use the secutive bits from the shift register minimum transmitter power necessary must be used to select the next fre- to carry out the desired communica- quency from a list of frequencies sorted tions. in ascending order. Each consecutive (b) No station may transmit with a frequency must be selected by a con- transmitter power exceeding 1.5 kW secutive block of n bits. (Where n is the PEP. (c) No station may transmit with a smallest integer greater than log2 x.) (ii) For direct sequence transmissions transmitter power exceeding 200 W using -ary modulation, consecutive PEP on: (1) The 3.675–3.725 MHz, 7.10–7.15 MHz, blocks of log2 m bits from the shift reg- ister must be used to select the trans- 10.10–10.15 MHz, and 21.1–21.2 MHz seg- mitted signal during each interval. ments; (e) The station records must docu- (2) The 28.1–28.5 MHz segment when ment all SS emission transmissions the control operator is a Novice or and must be retained for a period of 1 Technician operator; or year following the last entry. The sta- (3) The 7.050–7.075 MHz segment when tion records must include sufficient in- the station is within ITU Regions 1 or formation to enable the FCC, using the 3. information contained therein, to de- (d) No station may transmit with a modulate all transmissions. The sta- transmitter power exceeding 25 W PEP tion records must contain at least the on the VHF 1.25 m band when the con- following: trol operator is a Novice operator. (1) A technical description of the (e) No station may transmit with a transmitted signal; transmitter power exceeding 5 W PEP (2) Pertinent parameters describing on the UHF 23 cm band when the con- the transmitted signal including the trol operator is a Novice operator.

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