Goto Section: 15.105 | 15.109 | Table of Contents
FCC 15.107
Revised as of October 2, 2015
Goto Year:2014 |
2016
§ 15.107 Conducted limits.
(a) Except for Class A digital devices, for equipment that is designed to be
connected to the public utility (AC) power line, the radio frequency voltage
that is conducted back onto the AC power line on any frequency or
frequencies within the band 150 kHz to 30 MHz shall not exceed the limits in
the following table, as measured using a 50 μH/50 ohms line impedance
stabilization network (LISN). Compliance with the provisions of this
paragraph shall be based on the measurement of the radio frequency voltage
between each power line and ground at the power terminal. The lower limit
applies at the band edges.
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
*Decreases with the logarithm of the frequency.
(b) For a Class A digital device that is designed to be connected to the
public utility (AC) power line, the radio frequency voltage that is
conducted back onto the AC power line on any frequency or frequencies within
the band 150 kHz to 30 MHz shall not exceed the limits in the following
table, as measured using a 50 μH/50 ohms LISN. Compliance with the
provisions of this paragraph shall be based on the measurement of the radio
frequency voltage between each power line and ground at the power terminal.
The lower limit applies at the boundary between the frequency ranges.
Frequency of emission (MHz) Conducted limit (dBμV)
Quasi-peak Average
0.15-0.5 79 66
0.5-30 73 60
(c) The limits shown in paragraphs (a) and (b) of this section shall not
apply to carrier current systems operating as unintentional radiators on
frequencies below 30 MHz. In lieu thereof, these carrier current systems
shall be subject to the following standards:
(1) For carrier current systems containing their fundamental emission within
the frequency band 535-1705 kHz and intended to be received using a standard
AM broadcast receiver: no limit on conducted emissions.
(2) For all other carrier current systems: 1000 μV within the frequency band
535-1705 kHz, as measured using a 50 μH/50 ohms LISN.
(3) Carrier current systems operating below 30 MHz are also subject to the
radiated emission limits in § 15.109(e).
(d) Measurements to demonstrate compliance with the conducted limits are not
required for devices which only employ battery power for operation and which
do not operate from the AC power lines or contain provisions for operation
while connected to the AC power lines. Devices that include, or make
provision for, the use of battery chargers which permit operating while
charging, AC adaptors or battery eliminators or that connect to the AC power
lines indirectly, obtaining their power through another device which is
connected to the AC power lines, shall be tested to demonstrate compliance
with the conducted limits.
[ 54 FR 17714 , Apr. 25, 1989, as amended at 57 FR 33448 , July 29, 1992; 58 FR 51249 , Oct. 1, 1993; 66 FR 19098 , Apr. 13, 2001; 67 FR 45670 , July 10, 2002]
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Goto Section: 15.105 | 15.109
Goto Year: 2014 |
2016
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