TERMS USED IN PART 97 OF THE FCC RULES

AMTOR  The 7-unit code specified in ITU-R Recommendations M.476-5 and M.625-3.  Section 97.309(a)(2)

Angle-modulated emission

Antenna gain

Antenna directivity

ASCII   The 7-unit International Alphabet No. 5 code defined in ITU-T Recommendation T.50 (commonly known as "ASCII").  97.309(a)(3)

Automatically

Average transmitter power

Bandwidth The width of a frequency band outside of which the mean power of the transmitted signal is attenuated at least 26 dB below the mean power of the transmitted signal within the band.  97.3(a)(8)

Baudot   The 5-unit, start-stop, International Telegraph Alphabet No. 2, code defined in ITU-T Recommendation F.1, Division C.  97.309(a)(1)  

Band.  A defined range of contiguous frequencies.

Bandwidth The width of a frequency band outside of which the mean power of the transmitted signal is attenuated at least 26 dB below the mean power of the transmitted signal within the band.

Baud  A unit of signaling speed equal to the number of discrete conditions or events per second.

Channel  A band of frequencies of sufficient width for a single radio communication.

Chassis radiation  Unwanted radio frequency energy radiated from the circuitry of electronic apparatus.

CLOVER  A digital code whose technical characteristics have been documented publicly for the purpose of facilitating communications.  97.309(A)(4)

cm. Centimeter.

CW  International Morse code telegraphy emissions having designators with A, C, H, J or R as the first symbol; 1 as the second symbol; A or B as the third symbol; and emissions J2A and J2B.  97.3(c)(1)

Data Telemetry, telecommand and computer communications emissions having

     (i) designators with A, C, D, F, G, H, J or R as the first symbol, 1 as the second symbol, and D as the third symbol;

     (ii) emission J2D; and (iii) emissions A1C, F1C, F2C, J2C, and J3C having an occupied bandwidth of 500 Hz or less when transmitted on an amateur service frequency below 30 MHz. Only a digital code of a type specifically authorized in this part may be transmitted.  97.3(c)(2)

dipole.  A half-wave antenna with two elements in a straight line that are fed in the center.   

e.r.p. Effective radiated power

Effective radiated power.

Electromagnetic field.  Energy moving through space or materials in the form of changing electric and magnetic fields.

Emission.  Electromagnetic radiation from an antenna; also refers to modulation type, sometimes called mode, i.e., CW, MCW, phone, image, data, RTTY, pulse, SS and test.".

External RF power amplifier A device capable of increasing power output when used in conjunction with, but not an integral part of, a transmitter.  97.3(a)(18)

External RF power amplifier kit A number of electronic parts, which, when assembled, is an external RF power amplifier, even if additional parts are required to complete assembly.  97.3(a)(19)

EHF  Extremely high frequency. The frequency range 30-300 GHz.  97.3(b)(1)

Frequency  The number of complete oscillations per second of energy (as sound or electromagnetic radiation) in the form of waves.

Frequency shift keying.  A method of digital modulation in which individual bit values are represented by specific frequencies.

Fundamental emission.

Gain  The increase (as of voltage or signal intensity) caused by an amplifier; especially the ratio of output over input

GHz  Gigahertz. 1,000,000,000 Hz.

G-TOR  A digital code for the purpose of facilitating communications whose technical characteristics have been documented publicly.  97.309(A)(4)

Harmful interference  Interference which endangers the functioning of a radionavigation service or of other safety services or seriously degrades, obstructs or repeatedly interrupts a radiocommunication service operating in accordance with the latest ITU Radio Regulations to which the United States is a party.  97.3(a)(23) & (36)

HF  High frequency The frequency range 3-30 MHz.  97.3(b)(2)

Hz Hertz.  97.3(b)(3)

Image  Facsimile and television emissions having designators with A, C, D, F, G, H, J or R as the first symbol; 1, 2 or 3 as the second symbol; C or F as the third symbol; and emissions having B as the first symbol; 7, 8 or 9 as the second symbol; W as the third symbol.

Isotropically radiated power

Information rate

Keyclick

Kilobaud  1,000 baud

km Kilometer.  A distance of approximately       statue miles.

m  Meters.  97.3(b)(4)  A length of approximately      inches.

MCW  Tone-modulated international Morse code telegraphy emissions having designators with A, C, D, F, G, H or R as the first symbol; 2 as the second symbol; A or B as the third symbol.  97.3(c)(4)

Mean power

MF Medium frequency. The frequency range 300-3000 kHz.  97.3(b)(5)

MHz  Megahertz. 1,000,000 Hz.

µW  Microwatt. 1/1,000,000 watts

mm  Millimeter.  A length of approximately      inch.

Modulation  The process of varying the amplitude, frequency, or phase of a radio wave for the transmission of information.

Modulation index

Modulation frequency

mW. Milliwatt.  1/1,000 watts

Multiplex 

Nautical mile  An international unit equal to exactly 1852 meters.  6076.115 feet or 1.15 statute miles.

PacTOR  A digital code whose technical characteristics have been documented publicly for the purpose of facilitating communications.  97.309(A)(4)

PEP (peak envelope power). The average power supplied to the antenna transmission line by a transmitter during one RF cycle at the crest of the modulation envelope taken under normal operating conditions.  97.3(b)(6)

Phone  Speech and other sound emissions having designators with A, C, D, F, G, H, J or R as the first symbol; 1, 2 or 3 as the second symbol; E as the third symbol. Also speech emissions having B as the first symbol; 7, 8 or 9 as the second symbol; E as the third symbol. MCW for the purpose of performing the station identification procedure, or for providing telegraphy practice interspersed with speech. Incidental tones for the purpose of selective calling or alerting or to control the level of a demodulated signal may also be considered phone.  97.3(c)(5)

Power line radiation  Unwanted radio frequency energy radiated from the wiring that delivers electrical power.

Pulse. Emissions having designators with K, L, M, P, Q, V or W as the first symbol; 0, 1, 2, 3, 7, 8, 9 or X as the second symbol; A, B, C, D, E, F, N, W or X as the third symbol.  97.3(c)(6)

RF Radio frequency.  97.3(b)(7)

RF power amplifier

RTTY. Narrow-band direct-printing telegraphy emissions having designators with A, C, D, F, G, H, J or R as the first symbol; 1 as the second symbol; B as the third symbol; and emission J2B. Only a digital code of a type specifically authorized in this part may be transmitted.  97.3(c)(7)

Segment.  A portion of a frequency band.

SHF  Super-high frequency. The frequency range 3-30 GHz.  97.3(b)(8)

Sideband

Splatter

Symbol rate

Space telemetry  A one-way transmission from a space station of measurements made from the measuring instruments in a spacecraft, including those relating to the functioning of the spacecraft.  97.3(a)(41)

Spurious emission  An emission, or frequencies outside the necessary bandwidth of a transmission, the level of which may be reduced without affecting the information being transmitted.  97.3(a)(42)

SS. Spread spectrum emissions using bandwidth-expansion modulation emissions having designators with A, C, D, F, G, H, J or R as the first symbol; X as the second symbol; X as the third symbol.  97.3(c)(8)

Telecommand  A one-way transmission to initiate, modify, or terminate functions of a device at a distance.  97.3(a)(43)

Telemetry  A one-way transmission of measurements at a distance from the measuring instrument.  97.3(a)(45)

Transmission

Transmitter power

Test. Emissions containing no information having the designators with N as the third symbol. Test does not include pulse emissions with no information or modulation unless pulse emissions are also authorized in the frequency band.  97.3(c)(9)

UHF  Ultra-high frequency. The frequency range 300-3000 MHz.  97.3(b)(9)

VHF  Very-high frequency. The frequency range 30-300 MHz.  97.3(b)(10)

W. Watts.  97.3(b)(11)

Wavelength band  The approximate wavelength in meters of the frequencies within an amateur service band.  Example:  40 meters = 7.000-7.300 Mhz

February 3, 2010

Supersedes all prior versions