3. INDEX TERMS
1. FCC : Federal Communications Commission
2. OET : Office of Engineering & Technology
3. OST : Office of Science & Technology
4. MP : Measurement Procedures
5. ANSI : American National Standards Institution
6. CFR : Code of Federal Regulations
4. INTRODUCTION
• Standard : An approved model considered by an authority or by general consent as a
basis of comparison to judge the quality.
• Standards can cover a huge range of activities undertaken by organizations and used by
their customers.
• They can be very specific, such as to a particular type of product, or general such as
management practices.
• The Federal Communications Commission regulates interstate and international
communications by radio, television, wire, satellite and cable in USA.
• This approval process is designed to protect consumers & prevent monopolies.
5. The agency capitalizes on its competencies in:
1. Promoting competition, innovation and investment in broadband services and facilities
2. Supporting the nation's economy by ensuring an appropriate competitive framework for the
unfolding of the communications revolution
3. Encouraging the highest and best use of spectrum domestically and internationally
4. Revising media regulations so that new technologies flourish alongside diversity and
localism
5. Providing leadership in strengthening the defense of the nation's communications
infrastructure.
6. RULES & REGULATIONS for EMI/EMC
MEASUREMENT PROCEDURES
MP-3
Methods of Measurements of Output Signal Level, Output Terminal Conducted Spurious
Emissions, Transfer Switch Characteristics, and Radio Noise Emission from TV Interface
Devices, January 1985
MP-4 FCC Methods of Measurement of Radio Noise Emission from Computing Devices, July 1987
MP-5 FCC Methods of Measurements of Radio Noise Emissions from ISM Equipment, February 1986
SIMILAR STANDARDS
ANSI C63.4-2014 CFR Part 15, Subpart B
ANSI C63.10-2013 CFR Part 15, Subpart C
MP-5 CFR Part 18, ISM
ANSI C63.4-2014
Methods of Measurement of Radio-Noise
Emissions from Low-Voltage Electrical and
Electronic Equipment in the Range of 9
kHz to 40 GHz
ANSI C63.10-2013
Procedures for Compliance Testing of
Unlicensed Wireless Devices
7. EQUIPMENT AUTHORIZATION
1. Code of Federal Regulations, Title 47, Part 15 (47 CFR 15) is an oft-quoted part of Federal Communications
Commission (FCC) rules & regulations.
2. It regulates everything from spurious emissions to unlicensed low-power broadcasting.
3. FCC Part 15 Subpart A : An incidental radiator (defined in Section 15.3 (n)) is an electrical device that is not
designed to intentionally use, intentionally generate or intentionally emit radio frequency energy over 9 kHz.
EXAMPLE :
a. AC and DC motors,
b. mechanical light switches,
c. basic electrical power tools (that do not contain digital logic).
8. EQUIPMENT AUTHORIZATION – CONT’D
4. FCC Part 15 Subpart B : An unintentional radiator (defined in 15.3 (z)) is a device (Operating between 9 kHz
to 3000 GHz) by design that uses digital logic, electrical signals operating at radio frequencies for use within
the product, or sends radio frequency signals by conduction to associated equipment via connecting wiring,
but is not intended to emit RF energy wirelessly by radiation or induction.
EXAMPLES :
a. Wrist Watches,
b. Personal Computers,
c. Telephones,
d. Garage Door Receivers,
e. Wireless Temperature Probe Receiver,
f. RF universal remote control,
g. Motors & Basic Electrical Power Tools (that now use digital logic).
9. EQUIPMENT AUTHORIZATION – CONT’D
• FCC Part 15 (subparts C through H) : An intentional radiator (defined in Section 15.3 (o)) is a device that
intentionally generates and emits radio frequency energy by radiation or induction that may be operated without
an individual license.
• EXAMPLES : Wireless garage door openers, wireless temperature probe, RF universal remote control, cordless
telephones, alarm systems, vehicular radar systems, Wi-Fi, and Bluetooth devices.
• FCC Part 18 : When (RF) energy is used for providing energy other than telecommunications such as production of
physical, biological, chemical effects, heating, ionization of gases, mechanical vibrations, acceleration of charged
particles, these devices fall under the rules for Part 18.A medical device using RF energy locally comes under this
classification.
• EXAMPLES : Fluorescent lighting, halogen ballasts, arc welders, microwave ovens, &medical diathermy machines.
10. CONDUCTION LIMITS
Frequency of
emission (MHz)
Conducted limit (dBµV)
Quasi – peak Average
0.15 – 0.5 66 to 56* 56 to 46*
0.5 – 5 56 46
5 – 30 60 50
Except for Class A digital devices
Frequency of
emission (MHz)
Conducted limit (dBµV)
Quasi – peak Average
0.15 – 0.5 79 66
0.5 – 30 73 60
Class A digital devices
*Decreases with the logarithm of the frequency.
Applicable for both intentional &
unintentional radiators
Applicable for unintentional
radiators
11. RADIATION LIMITS – unintentional radiators
Frequency of
emission (MHz)
Field strength
(µV/m)
30-88 100
88-216 150
216-960 200
Above 960 500
Except for Class A digital devices Class A digital devices
Frequency of
emission (MHz)
Field strength
(µV/m)
30-88 90
88-216 150
216-960 210
Above 960 300
12. RADIATION LIMITS – intentional radiators
Frequency(MHz) Field strength (µV/m) Measurement distance (m)
0.009-0.490 2400/F(kHz) 300
0.490-1.705 24000/F(kHz) 30
1.705-30 30 30
30-88 100** 3
88-216 150** 3
216-960 200** 3
Above 960 500 3
**Fundamental emissions from intentional radiators operating under this section shall not be located
in the frequency bands 54-72 MHz, 76-88 MHz, 174-216 MHz or 470-806 MHz. However, operation
within these frequency bands is permItted under other sections of this part, e.g., §§15.231 and 15.241.
