Federal Communications Commission § 2.1033

Commission shall consult with the Of- industry test procedure that was used), fice of the United States Trade Rep- the date the measurements were made, resentative (USTR), as necessary, con- the location where the measurements cerning any disputes arising under an were made, and the device that was MRA for compliance with the Tele- tested (model and serial number, if communications Trade Act of 1988 available). The report shall include (Section 1371–1382 of the Omnibus sample calculations showing how the Trade and Competitiveness Act of 1988). measurement results were converted [64 FR 4995, Feb. 2, 1999, as amended at 66 FR for comparison with the technical re- 27601, May 18, 2001; 69 FR 54034, Sept. 7, 2004] quirements. (7) A sufficient number of photo- CERTIFICATION graphs to clearly show the exterior appearance, the construction, the compo- § 2.1031 Cross reference. nent placement on the chassis, and the The general provisions of this sub- chassis assembly. The exterior views part § 2.901 et seq. shall apply to appli- shall show the overall appearance, the cations for and grants of certification. antenna used with the device (if any), the controls available to the user, and § 2.1033 Application for certification. the required identification label in suf- (a) An application for certification ficient detail so that the name and FCC shall be filed on FCC Form 731 with all identifier can be read. In lieu of a pho- questions answered. Items that do not tograph of the label, a sample label (or apply shall be so noted. facsimile thereof) may be submitted (b) Applications for equipment oper- together with a sketch showing where ating under Parts 11, 15 and 18 of the this label will be placed on the equip- rules shall be accompanied by a tech- ment. Photographs shall be of size A4 nical report containing the following (21 cm × 29.7 cm) or 8×10 inches (20.3 cm information: × 25.4 cm). Smaller photographs may be (1) The full name and mailing address submitted provided they are sharp and of the manufacturer of the device and clear, show the necessary detail, and the applicant for certification. are mounted on A4 (21 cm × 29.7 cm) or (2) FCC identifier. 8.5×11 inch (21.6 cm × 27.9 cm) paper. A (3) A copy of the installation and op- sample label or facsimile together with erating instructions to be furnished the the sketch showing the placement of user. A draft copy of the instructions this label shall be on the same size may be submitted if the actual docu- paper. ment is not available. The actual docu- (8) If the equipment for which certifi- ment shall be furnished to the FCC cation is being sought must be tested when it becomes available. with peripheral or accessory devices (4) A brief description of the circuit connected or installed, a brief descrip- functions of the device along with a tion of those peripherals or accessories. statement describing how the device The peripheral or accessory devices operates. This statement should con- shall be unmodified, commercially tain a description of the ground system available equipment. and antenna, if any, used with the de- (9) For equipment subject to the pro- vice. visions of part 15 of this chapter, the (5) A block diagram showing the fre- application shall indicate if the equip- quency of all oscillators in the device. ment is being authorized pursuant to The signal path and frequency shall be the transition provisions in § 15.37 of indicated at each block. The tuning this chapter. range(s) and intermediate fre- (10) Applications for the certification quency(ies) shall be indicated at each of scanning receivers shall include a block. A schematic diagram is also re- statement describing the methods used quired for intentional radiators. to comply with the design require- (6) A report of measurements show- ments of all parts of § 15.121 of this ing compliance with the pertinent FCC chapter. The application must specifi- technical requirements. This report cally include a statement assessing the shall identify the test procedure used vulnerability of the equipment to pos- (e.g., specify the FCC test procedure, or sible modification and describing the

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design features that prevent the modi- (11) A photograph or drawing of the fication of the equipment by the user equipment identification plate or label to receive transmissions from the Cel- showing the information to be placed lular Radiotelephone Service. The ap- thereon. plication must also demonstrate com- (12) Photographs (8″×10″) of the equip- pliance with the signal rejection re- ment of sufficient clarity to reveal quirement of § 15.121 of this chapter, in- equipment construction and layout, including details on the measurement cluding meters, if any, and labels for procedures used to demonstrate com- controls and meters and sufficient pliance. views of the internal construction to (11) Applications for certification of define component placement and chas- transmitters operating within the 59.0– sis assembly. Insofar as these require- 64.0 GHz band under part 15 of this ments are met by photographs or draw- chapter shall also be accompanied by ings contained in instruction manuals an exhibit demonstrating compliance supplied with the certification request, with the provisions of § 15.255 (g) and (i) additional photographs are necessary of this chapter. only to complete the required showing. (12) An application for certification (13) For equipment employing digital of a software defined radio must in- modulation techniques, a detailed de- clude the information required by scription of the modulation system to § 2.944. be used, including the response charac- (c) Applications for equipment other teristics (frequency, phase and ampli- than that operating under parts 15 and tude) of any filters provided, and a de- 18 of the rules shall be accompanied by scription of the modulating wavetrain, a technical report containing the fol- shall be submitted for the maximum lowing information: rated conditions under which the (1) The full name and mailing address equipment will be operated. of the manufacturer of the device and (14) The data required by §§ 2.1046 the applicant for certification. through 2.1057, inclusive, measured in (2) FCC identifier. (3) A copy of the installation and op- accordance with the procedures set out erating instructions to be furnished the in § 2.1041. user. A draft copy of the instructions (15) The application for certification may be submitted if the actual docu- of an external radio frequency power ment is not available. The actual docu- amplifier under part 97 of this chapter ment shall be furnished to the FCC need not be accompanied by the data when it becomes available. required by paragraph (b)(14) of this (4) Type or types of emission. section. In lieu thereof, measurements (5) Frequency range. shall be submitted to show compliance (6) Range of operating power values with the technical specifications in or specific operating power levels, and subpart C of part 97 of this chapter and description of any means provided for such information as required by § 2.1060 variation of operating power. of this part. (7) Maximum power rating as defined (16) An application for certification in the applicable part(s) of the rules. of an AM broadcast stereophonic ex- (8) The dc voltages applied to and dc citer-generator intended for inter- currents into the several elements of facing with existing certified, or for- the final radio frequency amplifying merly type accepted or notified trans- device for normal operation over the mitters must include measurements power range. made on a complete stereophonic (9) Tune-up procedure over the power transmitter. The instruction book range, or at specific operating power must include complete specifications levels. and circuit requirements for inter- (10) A schematic diagram and a de- connecting with existing transmitters. scription of all circuitry and devices The instruction book must also provide provided for determining and stabi- a full description of the equipment and lizing frequency, for suppression of spu- measurement procedures to monitor rious radiation, for limiting modula- modulation and to verify that the com- tion, and for limiting power. bination of stereo exciter-generator

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and transmitter meet the emission imum power or field strength ratings limitations of § 73.44. shall not be performed without applica- (17) Applications for certification re- tion for and authorization of a new quired by § 25.129 of this chapter shall grant of certification. Variations in include any additional equipment test electrical or mechanical construction, data required by that section. other than these indicated items, are (18) An application for certification permitted provided the variations ei- of a software defined radio must in- ther do not affect the characteristics clude the information required by required to be reported to the Commis- § 2.944. sion or the variations are made in com- (d) Applications for certification of pliance with the other provisions of equipment operating under part 20, this section. Changes to the software that a manufacturer is seeking to cer- installed in a transmitter that do not tify as hearing aid compatible, as set affect the radio frequency emissions do forth in § 20.19 of that part, shall in- not require a filing with the Commis- clude a statement indicating compli- sion and may be made by parties other ance with the test requirements of than the holder of the grant of certifi- § 20.19 and indicating the appropriate cation. U-rating for the equipment. The manu- (b) Three classes of permissive facturer of the equipment shall be re- changes may be made in certificated sponsible for maintaining the test re- equipment without requiring a new ap- sults. plication for and grant of certification. (e) A single application may be filed None of the classes of changes shall re- for a composite system that incor- sult in a change in identification. porates devices subject to certification (1) A Class I permissive change in- under multiple rule parts, however, the cludes those modifications in the appropriate fee must be included for equipment which do not degrade the each device. Separate applications characteristics reported by the manu- must be filed if different FCC Identi- facturer and accepted by the Commis- fiers will be used for each device. sion when certification is granted. No [63 FR 36599, July 7, 1998, as amended at 63 filing with the Commission is required FR 42278, Aug. 7, 1998; 64 FR 22561, Apr. 27, for a Class I permissive change. 1999; 67 FR 42734, June 25, 2002; 68 FR 54175, (2) A Class II permissive change in- Sept. 16, 2003; 68 FR 68545, Dec. 9, 2003; 69 FR cludes those modifications which de- 5709, Feb. 6, 2004; 70 FR 23039, May 4, 2005] grade the performance characteristics as reported to the Commission at the § 2.1035 [Reserved] time of the initial certification. Such § 2.1041 Measurement procedure. degraded performance must still meet the minimum requirements of the ap- For equipment operating under parts plicable rules. When a Class II permis- 15 and 18, the measurement procedures sive change is made by the grantee, the are specified in the rules governing the grantee shall supply the Commission particular device for which certifi- with complete information and the re- cation is requested. For equipment op- sults of tests of the characteristics af- erating in the authorized radio serv- fected by such change. The modified ices, measurements are required as equipment shall not be marketed under specified in §§ 2.1046, 2.1047, 2.1049, the existing grant of certification prior 2.1051, 2.1053, 2.1055 and 2.1057. See also to acknowledgement by the Commis- § 2.947. sion that the change is acceptable. [63 FR 36600, July 7, 1998] (3) A Class III permissive change in- cludes modifications to the software of § 2.1043 Changes in certificated equip- a software defined radio transmitter ment. that change the frequency range, mod- (a) Except as provided in paragraph ulation type or maximum output power (b)(3) of this section, changes to the (either radiated or conducted) outside basic frequency determining and stabi- the parameters previously approved, or lizing circuitry (including clock or that change the circumstances under data rates), frequency multiplication which the transmitter operates in ac- stages, basic modulator circuit or max- cordance with Commission rules. When

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a Class III permissive change is made, paragraph (b) of this section, provided the grantee shall supply the Commis- the following conditions are met: sion with a description of the changes (1) Any person performing such modi- and test results showing that the fications on equipment used under part equipment complies with the applica- 97 of this chapter must possess a valid ble rules with the new software loaded, amateur radio operator license of the including compliance with the applica- class required for the use of the equip- ble RF exposure requirements. The ment being modified. modified software shall not be loaded (2) Modifications made pursuant to into the equipment, and the equipment this paragraph are limited to equip- shall not be marketed with the modi- ment used at licensed amateur radio fied software under the existing grant stations. of certification, prior to acknowledge- (3) Modifications specified or per- ment by the Commission that the formed by equipment manufacturers or change is acceptable. Class III changes suppliers must be in accordance with are permitted only for equipment in the requirements set forth in para- which no Class II changes have been graph (b) of this section. made from the originally approved de- (4) Modifications specified or per- vice. formed by licensees in the Amateur Radio Service on equipment other than NOTE TO PARAGRAPH (b)(3): Any software that at specific licensed amateur radio change that degrades spurious and out-of- stations must be in accordance with band emissions previously reported to the the requirements set forth in para- Commission at the time of initial certification would be considered a change in fre- graph (b) of this section. quency or modulation and would require a (5) The station licensee shall be re- Class III permissive change or new equip- sponsible for ensuring that modified ment authorization application. equipment used at his station will comply with the applicable technical (4) Class I and Class II permissive standards in part 97 of this chapter. changes may only be made by the hold- (f) For equipment other than that oper of the grant of certification, except erating under parts 15 or 18, when a as specified below. Class II permissive change is made by (c) A grantee desiring to make a other than the grantee of certification, change other than a permissive change the information and data specified in shall file an application on FCC Form paragraph (b)(2) of this section shall be 731 accompanied by the required fees. supplied by the person making the The grantee shall attach a description change. The modified equipment shall of the change(s) to be made and a not be operated under an authorization statement indicating whether the of the Commission prior to acknowl- change(s) will be made in all units (in- edgement by the Commission that the cluding previous production) or will be change is acceptable. made only in those units produced (g) The interconnection of a certifi- after the change is authorized. cated or formerly type accepted AM (d) A modification which results in a broadcast stereophonic exciter-gener- change in the identification of a device ator with a certificated or formerly with or without change in circuitry re- type accepted AM broadcast trans- quires a new application for, and grant mitter in accordance with the manu- of certification. If the changes affect facturer’s instructions and upon com- the characteristics required to be re- pletion of measurements showing that ported, a complete application shall be the modified transmitter meets the filed. If the characteristics required to emission limitation requirements of be reported are not changed the abbre- § 73.44 is defined as a Class I permissive viated procedure of § 2.933 may be used. change for compliance with this sec- (e) Equipment that has been certifi- tion. cated or formerly type accepted for use (h) The interconnection of a multi- in the Amateur Radio Service pursuant plexing exciter with a certificated or to the requirements of part 97 of this formerly type accepted AM broadcast chapter may be modified without re- transmitter in accordance with the gard to the conditions specified in manufacturer’s instructions without

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electrical or mechanical modification cuit elements specified in § 2.1033(c)(8). of the transmitter circuits and comple- The electrical characteristics of the tion of equipment performance meas- radio frequency load attached to the urements showing the transmitter output terminals when this test is meets the minimum performance re- made shall be stated. quirements applicable thereto is de- (b) For single sideband, independent fined as a Class I permissive change for sideband, and single channel, con- compliance with this section. trolled carrier radiotelephone trans- (i) The addition of TV broadcast sub- mitters the procedure specified in para- carrier generators to a certificated or graph (a) of this section shall be em- formerly type accepted TV broadcast ployed and, in addition, the trans- transmitter or the addition of FM mitter shall be modulated during the broadcast subcarrier generators to a test as follows. In all tests, the input type accepted FM broadcast trans- level of the modulating signal shall be mitter, provided the transmitter ex- such as to develop rated peak envelope citer is designed for subcarrier oper- power or carrier power, as appropriate, ation without mechanical or electrical for the transmitter. alterations to the exciter or other (1) Single sideband transmitters in transmitter circuits. the A3A or A3J emission modes—by (j) The addition of TV broadcast two tones at frequencies of 400 Hz and stereophonic generators to a certifi- 1800 Hz (for 3.0 kHz authorized band- cated or formerly type accepted TV width), or 500 Hz and 2100 Hz (3.5 kHz broadcast transmitter or the addition authorized bandwidth), or 500 Hz and of FM broadcast stereophonic genera- 2400 Hz (for 4.0 kHz authorized band- tors to a certificated or formerly type width), applied simultaneously, the accepted FM broadcast transmitter, input levels of the tones so adjusted provided the transmitter exciter is de- that the two principal frequency com- signed for stereophonic sound oper- ponents of the radio frequency signal ation without mechanical or electrical produced are equal in magnitude. alterations to the exciter or other (2) Single sideband transmitters in transmitter circuits. the A3H emission mode—by one tone at (k) The addition of subscription TV a frequency of 1500 Hz (for 3.0 kHz au- encoding equipment for which the FCC thorized bandwidth), or 1700 Hz (for 3.5 has granted advance approval under kHz authorized bandwidth), or 1900 Hz the provisions of § 2.1400 in subpart M (for 4.0 kHz authorized bandwidth), the and § 73.644(c) of part 73 to a certifi- level of which is adjusted to produce a cated or formerly type accepted trans- radio frequency signal component mitter is considered a Class I permis- equal in magnitude to the magnitude sive change. of the carrier in this mode. (l) Notwithstanding the provisions of (3) As an alternative to paragraphs this section, broadcast licensees or per- (b) (1) and (2) of this section other mittees are permitted to modify cer- tones besides those specified may be tificated or formerly type accepted used as modulating frequencies, upon a equipment pursuant to § 73.1690 of the sufficient showing of need. However, FCC’s rules. any tones so chosen must not be har- [63 FR 36600, July 7, 1998, as amended at 66 monically related, the third and fifth FR 50840, Oct. 5, 2001; 70 FR 23040, May 4, order intermodulation products which 2005] occur must fall within the ¥25 dB step of the emission bandwidth limitation § 2.1046 Measurements required: RF curve, the seventh and ninth order power output. intermodulation product must fall (a) For transmitters other than sin- within the 35 dB step of the referenced gle sideband, independent sideband and curve and the eleventh and all higher controlled carrier radiotelephone, order products must fall beyond the power output shall be measured at the ¥35 dB step of the referenced curve. RF output terminals when the trans- (4) Independent sideband transmit- mitter is adjusted in accordance with ters having two channels by 1700 Hz the tune-up procedure to give the val- tones applied simultaneously in both ues of current and voltage on the cir- channels, the input levels of the tones

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so adjusted that the two principal fre- the peak envelope power output versus quency components of the radio fre- the modulation input voltage shall be quency signal produced are equal in supplied. The modulating signals shall magnitude. be the same in frequency as specified in (5) Independent sideband transmit- paragraph (c) of § 2.1049 for the occupied ters having more than two channels by bandwidth tests. an appropriate signal or signals applied (d) Other types of equipment. A curve to all channels simultaneously. The or equivalent data which shows that input signal or signals shall simulate the equipment will meet the modula- the input signals specified by the man- tion requirements of the rules under ufacturer for normal operation. which the equipment is to be licensed. (6) Single-channel controlled-carrier [39 FR 5919, Feb. 15, 1974. Redesignated and transmitters in the A3 emission mode— amended at 63 FR 36599, July 7, 1998] by a 2500 Hz tone. (c) For measurements conducted pur- § 2.1049 Measurements required: Occu- suant to paragraphs (a) and (b) of this pied bandwidth. section, all calculations and methods The occupied bandwidth, that is the used by the applicant for determining frequency bandwidth such that, below carrier power or peak envelope power, its lower and above its upper frequency as appropriate, on the basis of meas- limits, the mean powers radiated are ured power in the radio frequency load each equal to 0.5 percent of the total attached to the transmitter output ter- mean power radiated by a given emis- minals shall be shown. Under the test sion shall be measured under the fol- conditions specified, no components of lowing conditions as applicable: the emission spectrum shall exceed the (a) Radiotelegraph transmitters for limits specified in the applicable rule manual operation when keyed at 16 parts as necessary for meeting occu- dots per second. pied bandwidth or emission limita- (b) Other keyed transmitters—when tions. keyed at the maximum machine speed. [39 FR 5919, Feb. 15, 1974. Redesignated and (c) Radiotelephone transmitters amended at 63 FR 36599, July 7, 1998] equipped with a device to limit modulation or peak envelope power shall be § 2.1047 Measurements required: Mod- modulated as follows. For single side- ulation characteristics. band and independent sideband trans- (a) Voice modulated communication mitters, the input level of the modu- equipment. A curve or equivalent data lating signal shall be 10 dB greater showing the frequency response of the than that necessary to produce rated audio modulating circuit over a range peak envelope power. of 100 to 5000 Hz shall be submitted. For (1) Other than single sideband or equipment required to have an audio independent sideband transmitters— low-pass filter, a curve showing the fre- when modulated by a 2500 Hz tone at an quency response of the filter, or of all input level 16 dB greater than that nec- circuitry installed between the modu- essary to produce 50 percent modula- lation limiter and the modulated stage tion. The input level shall be estab- shall be submitted. lished at the frequency of maximum re- (b) Equipment which employs modula- sponse of the audio modulating circuit. tion limiting. A curve or family of (2) Single sideband transmitters in curves showing the percentage of mod- A3A or A3J emission modes—when ulation versus the modulation input modulated by two tones at frequencies voltage shall be supplied. The informa- of 400 Hz and 1800 Hz (for 3.0 kHz au- tion submitted shall be sufficient to thorized bandwidth), or 500 Hz and 2100 show modulation limiting capability Hz (for 3.5 kHz authorized bandwidth), throughout the range of modulating or 500 Hz and 2400 Hz (for 4.0 kHz au- frequencies and input modulating sig- thorized bandwidth), applied simulta- nal levels employed. neously. The input levels of the tones (c) Single sideband and independent shall be so adjusted that the two prin- sideband radiotelephone transmitters cipal frequency components of the which employ a device or circuit to limit radio frequency signal produced are peak envelope power. A curve showing equal in magnitude.

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(3) Single sideband transmitters in shall be so adjusted that the two prin- the A3H emission mode—when modu- cipal frequency components of the lated by one tone at a frequency of 1500 radio frequency signal produced are Hz (for 3.0 kHz authorized bandwidth), equal in magnitude. or 1700 Hz (for 3.5 kHz authorized band- (3) Single sideband transmitters in width), or 1900 Hz (for 4.0 kHz author- the A3H emission mode—when modu- ized bandwidth), the level of which is lated by one tone at a frequency of 1500 adjusted to produce a radio frequency Hz (for 3.0 kHz authorized bandwidth), signal component equal in magnitude or 1700 Hz (for 3.5 kHz authorized band- to the magnitude of the carrier in this width), or 1900 Hz (for 4.0 kHz author- mode. ized bandwidth), the level of which is (4) As an alternative to paragraphs adjusted to produce a radio frequency (c) (2) and (3) of this section, other signal component equal in magnitude tones besides those specified may be to the magnitude of the carrier in this used as modulating frequencies, upon a mode. sufficient showing of need. However, (4) As an alternative to paragraphs any tones so chosen must not be har- (d) (2) and (3) of this section, other monically related, the third and fifth tones besides those specified may be order intermodulation products which used as modulating frequencies, upon a occur must fall within the ¥25 dB step sufficient showing of need. However of the emission bandwidth limitation any tones so chosen must not be har- curve, the seventh and ninth order monically related, the third and fifth products must fall within the ¥35 dB order intermodulation products which step of the referenced curve and the occur must fall within the ¥25 dB step eleventh and all higher order products of the emission bandwidth limitation must fall beyond the ¥35 dB step of the curve, the seventh and ninth order referenced curve. products must fall within the ¥35 dB (5) Independent sideband transmit- step of the referenced curve and the ters having two channels—when modu- eleventh and all higher order products lated by 1700 Hz tones applied simulta- must fall beyond the ¥35 dB step of the neously to both channels. The input referenced curve. levels of the tones shall be so adjusted (5) Independent sideband transmit- that the two principal frequency com- ters having two channels—when modu- ponents of the radio frequency signal lated by 1700 Hz tones applied simulta- produced are equal in magnitude. neously to both channels. The input (d) Radiotelephone transmitters levels of the tones shall be so adjusted without a device to limit modulation that the two principal frequency com- or peak envelope power shall be modu- ponents of the radio frequency signal lated as follows. For single sideband produced are equal in magnitude. and independent sideband transmitters, (e) Transmitters for use in the Radio the input level of the modulating sig- Broadcast Services: nal should be that necessary to produce (1) AM broadcast transmitters for rated peak envelope power. monaural operation—when amplitude (1) Other than single sideband or modulated 85% by a 7,500 Hz input sig- independent sideband transmitters— nal. when modulated by a 2500 Hz tone of (2) AM broadcast stereophonic oper- sufficient level to produce at least 85 ation—when the transmitter operated percent modulation. If 85 percent mod- under any stereophonic modulation ulation is unattainable, the highest condition not exceeding 100% on nega- percentage modulation shall be used. tive peaks and tested under the condi- (2) Single sideband transmitters in tions specified in § 73.128 in part 73 of A3A or A3J emission modes—when the FCC rules for AM broadcast sta- modulated by two tones at frequencies tions. of 400 Hz and 1800 Hz (for 3.0 kHz au- (3) FM broadcast transmitter not thorized bandwidth), or 500 Hz and 2100 used for multiplex operation—when Hz (for 3.5 kHz authorized bandwidth), modulated 85 percent by a 15 kHz input or 500 Hz and 2400 Hz (for 4.0 kHz au- signal. thorized bandwidth), applied simulta- (4) FM broadcast transmitters for neously. The input levels of the tones multiplex operation under Subsidiary

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Communication Authorization (SCA)— iary subcarriers shall result in 85% de- when carrier is modulated 70 percent viation of the maximum specified aural by a 15 kHz main channel input signal, carrier deviation. and modulated an additional 15 percent (f) Transmitters for which peak fre- simultaneously by a 67 kHz subcarrier quency deviation (D) is determined in (unmodulated). accordance with § 2.202(f), and in which (5) FM broadcast transmitter for the modulating baseband comprises stereophonic operation—when modu- more than 3 independent speech chan- lated by a 15 kHz input signal to the nels—when modulated by a test signal main channel, a 15 kHz input signal to determined in accordance with the fol- the stereophonic subchannel, and the lowing: pilot subcarrier simultaneously. The (1) A modulation reference level is es- input signals to the main channel and tablished for the characteristic stereophonic subchannel each shall baseband frequency. (Modulation ref- produce 38 percent modulation of the erence level is defined as the average carrier. The pilot subcarrier should power level of a sinusoidal test signal produce 9 percent modulation of the delivered to the modulator input which carrier. provides the specified value of per- (6) Television broadcast monaural channel deviation.) transmitters—when modulated 85% by (2) Modulation reference level being a 15 kHz input signal. established, the total rms deviation of (7) Television broadcast stereophonic the transmitter is measured when a sound transmitters—when the trans- test signal consisting of a band of ran- mitter is modulated with a 15 kHz dom noise extending from below 20 kHz input signal to the main channel and to the highest frequency in the the stereophonic subchannel, any pilot baseband, is applied to the modulator subcarrier(s) and any unmodulated input through any preemphasis net- auxiliary subcarrier(s) which may be works used in normal service. The av- provided. The signals to the main chan- erage power level of the test signal nel and the stereophonic subchannel shall exceed the modulation reference must be representative of the system level by the number of decibels deter- being tested and when combined with mined using the appropriate formula in any pilot subcarrier(s) or other auxil- the following table:

Number of message circuits that Number of dB by which the average power (Pavg) level test sig- modulate the transmitter nal shall exceed the modulation reference level Limits of Pavg (dBm0)

More than 3, but less than 12 ...... To be specified by the equipment manufacturer subject to FCC approval. At least 12, but less than 60 ...... X+2 log10 Nc ...... X: ¥2 to +2.6 At least 60, but less than 240 ...... X+4 log10 Nc ...... X: ¥5.6 to ¥1.0 240 or more ...... X+10 log10 Nc ...... X: ¥19.6 to ¥15.0

Where X represents the average power in a message circuit in dBm0; Nc is the number of circuits in the multiplexed message load. Pavg shall be selected by the transmitter manufacturer and included with the technical data submitted with the application for type acceptance. (See § 2.202(e) in this chapter.)

(g) Transmitters in which the modu- (h) Transmitters employing digital lating baseband comprises not more modulation techniques—when modu- than three independent channels— lated by an input signal such that its when modulated by the full com- amplitude and symbol rate represent plement of signals for which the trans- the maximum rated conditions under mitter is rated. The level of modula- which the equipment will be operated. tion for each channel should be set to The signal shall be applied through any that prescribed in rule parts applicable filter networks, pseudo-random genera- to the services for which the trans- tors or other devices required in nor- mitter is intended. If specific modula- mal service. Additionally, the occupied tion levels are not set forth in the bandwidth shall be shown for operation rules, the tests should provide the with any devices used for modifying manufacturer’s maximum rated condi- the spectrum when such devices are op- tion. tional at the discretion of the user.

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(i) Transmitters designed for other field measurements (e.g. a broadcast types of modulation—when modulated transmitter installed in a building) by an appropriate signal of sufficient measurements will be accepted of the amplitude to be representative of the equipment as installed. Such measure- type of service in which used. A de- ments must be accompanied by a description of the input signal should be scription of the site where the meas- supplied. urements were made showing the loca- (Secs. 4, 303, 307, 48 Stat., as amended, 1066, tion of any possible source of reflec- 1082, 1083; 47 U.S.C. 154, 303, 307) tions which might distort the field strength measurements. Information [39 FR 5919, Feb. 15, 1974, as amended at 39 submitted shall include the relative ra- FR 35664, Oct. 3, 1974; 47 FR 13164, Mar. 29, 1982; 48 FR 16493, Apr. 18, 1983; 49 FR 18105, diated power of each spurious emission Apr. 27, 1984. Redesignated at 63 FR 36599, with reference to the rated power out- July 7, 1998] put of the transmitter, assuming all emissions are radiated from halfwave § 2.1051 Measurements required: Spu- dipole antennas. rious emissions at antenna termi- (b) The measurements specified in nals. paragraph (a) of this section shall be The radio frequency voltage or pow- made for the following equipment: ers generated within the equipment (1) Those in which the spurious emis- and appearing on a spurious frequency sions are required to be 60 dB or more shall be checked at the equipment out- below the mean power of the trans- put terminals when properly loaded mitter. with a suitable artificial antenna. (2) All equipment operating on fre- Curves or equivalent data shall show quencies higher than 25 MHz. the magnitude of each harmonic and (3) All equipment where the antenna other spurious emission that can be de- is an integral part of, and attached di- tected when the equipment is operated rectly to the transmitter. under the conditions specified in § 2.1049 as appropriate. The magnitude (4) Other types of equipment as re- of spurious emissions which are attenu- quired, when deemed necessary by the ated more than 20 dB below the permis- Commission. sible value need not be specified. [39 FR 5919, Feb. 15, 1974. Redesignated and amended at 63 FR 36599, July 7, 1998] [39 FR 5919, Feb. 15, 1974. Redesignated and amended at 63 FR 36599, July 7, 1998] § 2.1055 Measurements required: Fre- § 2.1053 Measurements required: Field quency stability. strength of spurious radiation. (a) The frequency stability shall be (a) Measurements shall be made to measured with variation of ambient detect spurious emissions that may be temperature as follows: radiated directly from the cabinet, (1) From ¥30° to +50° centigrade for control circuits, power leads, or inter- all equipment except that specified in mediate circuit elements under normal paragraphs (a) (2) and (3) of this sec- conditions of installation and oper- tion. ation. Curves or equivalent data shall (2) From ¥20° to +50° centigrade for be supplied showing the magnitude of equipment to be licensed for use in the each harmonic and other spurious Maritime Services under part 80 of this emission. For this test, single side- chapter, except for Class A, B, and S band, independent sideband, and con- Emergency Position Indicating trolled carrier transmitters shall be Radiobeacons (EPIRBS), and equip- modulated under the conditions speci- ment to be licensed for use above 952 fied in paragraph (c) of § 2.1049, as ap- MHz at operational fixed stations in all propriate. For equipment operating on services, stations in the Local Tele- frequencies below 890 MHz, an open vision Transmission Service and Point- field test is normally required, with to-Point Microwave Radio Service the measuring instrument antenna lo- under part 21 of this chapter, equip- cated in the far-field at all test fre- ment licensed for use aboard aircraft in quencies. In the event it is either im- the Aviation Services under part 87 of practical or impossible to make open this chapter, and equipment authorized

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for use in the Family Radio Service than 10° centigrade above the respec- under part 95 of this chapter. tive beginning ambient temperature (3) From 0° to +50° centigrade for level. equipment to be licensed for use in the (3) The elapsed time necessary for the Radio Broadcast Services under part 73 frequency to stabilize within the appli- of this chapter. cable tolerance from each beginning (b) Frequency measurements shall be ambient temperature level as deter- made at the extremes of the specified mined from the tests specified in this temperature range and at intervals of paragraph shall be specified in the in- not more than 10° centigrade through struction book for the transmitter fur- the range. A period of time sufficient nished to the user. to stabilize all of the components of (4) When it is impracticable to sub- the oscillator circuit at each tempera- ject the complete transmitter to this ture level shall be allowed prior to fre- test because of its physical dimensions quency measurement. The short term or power rating, only its frequency de- transient effects on the frequency of termining and stabilizing portions need the transmitter due to keying (except be tested. for broadcast transmitters) and any (d) The frequency stability shall be heating element cycling normally oc- measured with variation of primary curring at each ambient temperature supply voltage as follows: level also shall be shown. Only the por- (1) Vary primary supply voltage from tion or portions of the transmitter con- 85 to 115 percent of the nominal value taining the frequency determining and for other than hand carried battery stabilizing circuitry need be subjected equipment. to the temperature variation test. (2) For hand carried, battery powered (c) In addition to all other require- equipment, reduce primary supply volt- ments of this section, the following in- age to the battery operating end point formation is required for equipment in- which shall be specified by the manu- corporating heater type crystal oscilla- facturer. tors to be used in mobile stations, for (3) The supply voltage shall be meas- which type acceptance is first re- ured at the input to the cable normally quested after March 25, 1974, except for provided with the equipment, or at the battery powered, hand carried, portable power supply terminals if cables are equipment having less than 3 watts not normally provided. Effects on fre- mean output power. quency of transmitter keying (except (1) Measurement data showing vari- for broadcast transmitters) and any ation in transmitter output frequency heating element cycling at the nomi- from a cold start and the elapsed time nal supply voltage and at each extreme necessary for the frequency to stabilize also shall be shown. within the applicable tolerance. Tests (e) When deemed necessary, the Com- shall be made after temperature sta- mission may require tests of frequency bilization at each of the ambient tem- stability under conditions in addition perature levels; the lower temperature to those specifically set out in para- limit, 0° centigrade and +30° centigrade graphs (a), (b), (c), and (d) of this sec- with no primary power applied. tion. (For example measurements (2) Beginning at each temperature showing the effect of proximity to level specified in paragraph (c)(1) of large metal objects, or of various types this section, the frequency shall be of antennas, may be required for port- measured within one minute after ap- able equipment.) plication of primary power to the [39 FR 5919, Feb. 14, 1974, as amended at 51 transmitter and at intervals of no more FR 31304, Sept. 2, 1986; 56 FR 11682, Mar. 20, than one minute thereafter until ten 1991. Redesignated at 63 FR 36599, July 7, minutes have elapsed or until suffi- 1998. 68 FR 68545, Dec. 9, 2003] cient measurements are obtained to indicate clearly that the frequency has § 2.1057 Frequency spectrum to be in- stabilized within the applicable toler- vestigated. ance, whichever time period is greater. (a) In all of the measurements set During each test, the ambient tempera- forth in §§ 2.1051 and 2.1053, the spec- ture shall not be allowed to rise more trum shall be investigated from the

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lowest radio frequency signal gen- these amplifiers in services other than erated in the equipment, without going the Amateur Radio Service. below 9 kHz, up to at least the fre- [63 FR 36601, July 7, 1998, as amended at 71 quency shown below: FR 66461, Nov. 15, 2006] (1) If the equipment operates below 10 GHz: to the tenth harmonic of the DECLARATION OF CONFORMITY highest fundamental frequency or to 40 GHz, whichever is lower. § 2.1071 Cross reference. (2) If the equipment operates at or The general provisions of this sub- above 10 GHz and below 30 GHz: to the part, shall apply to equipment subject fifth harmonic of the highest funda- to a Declaration of Conformity. mental frequency or to 100 GHz, which- [61 FR 31046, June 19, 1996] ever is lower. (3) If the equipment operates at or § 2.1072 Limitation on Declaration of above 30 GHz: to the fifth harmonic of Conformity. the highest fundamental frequency or (a) The Declaration of Conformity to 200 GHz, whichever is lower. signifies that the responsible party, as (b) Particular attention should be defined in § 2.909, has determined that paid to harmonics and subharmonics of the equipment has been shown to com- the carrier frequency as well as to ply with the applicable technical those frequencies removed from the standards if no unauthorized change is carrier by multiples of the oscillator made in the equipment and if the frequency. Radiation at the frequencies equipment is properly maintained and of multiplier stages should also be operated. Compliance with these stand- checked. ards shall not be construed to be a find- (c) The amplitude of spurious emis- ing by the responsible party with re- sions which are attenuated more than spect to matters not encompassed by 20 dB below the permissible value need the Commission’s rules. not be reported. (b) A Declaration of Conformity by (d) Unless otherwise specified, meas- the responsible party is effective until urements above 40 GHz shall be per- a termination date is otherwise estab- formed using a minimum resolution lished by the Commission. bandwidth of 1 MHz. (c) No person shall, in any adver- tising matter, brochure, etc., use or [61 FR 14502, Apr. 2, 1996. Redesignated and amended at 63 FR 36599, July 7, 1998] make reference to a Declaration of Conformity in a deceptive or mis- § 2.1060 Equipment for use in the ama- leading manner or convey the impres- teur radio service. sion that such a Declaration of Con- (a) The general provisions of §§ 2.925, formity reflects more than a deter- 2.1031, 2.1033, 2.1041, 2.1043, 2.1051, 2.1053 mination by the responsible party that and 2.1057 shall apply to applications the device or product has been shown for, and grants of, certification for to be capable of complying with the ap- equipment operated under the require- plicable technical standards of the ments of part 97 of this chapter, the Commission’s rules. Amateur Radio Service. [61 FR 31046, June 19, 1996] (b) When performing the tests specified in §§ 2.1051 and 2.1053 of this part, § 2.1073 Responsibilities. the center of the transmitted band- (a) The responsible party, as defined width shall be within the operating fre- in § 2.909, must warrant that each unit quency band by an amount equal to 50 of equipment marketed under a Dec- percent of the bandwidth utilized for laration of Conformity is identical to the tests. In addition, said tests shall the unit tested and found acceptable be made on at least one frequency in with the standards and that the records each of the bands within which the maintained by the responsible party equipment is capable of tuning. continue to reflect the equipment (c) Certification of external radio fre- being produced under the Declaration quency power amplifiers may be denied of Conformity within the variation when denial would prevent the use of that can be expected due to quantity

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