FCC Logo - Return to the FCC Home Page
Office of Engineering and Technology

  


Publication Number: 460108 Rule Parts: 15C Publication Date: 06/15/2015
Keyword: Radiated emission measurements below 30 MHz

First Category: Test Sites and Accreditations
Second Category: General [Test Sites and Accreditations]

Question:   May a monopole (rod) antenna be used for performing radiated emission measurements below 30 MHz?



Answer:  

It is not acceptable to use a monopole (rod) antenna when performing measurements to demonstrate compliance with the FCC radiated emissions limits below 30 MHz. The reference regarding a monopole antenna in ANSI C63.4-2014 is excluded per Section 15.31. The procedures for measuring radiated emissions for intentional and unintentional radiators are found in ANSI C63.10-2013 and ANSI C63.4-2014, respectively.

Unintentional Radiators - ANSI C63.4-2014, clause 4.5 provides information on selecting the correct measurement antenna for radiated emission measurements. Table 2, footnote (b) explains the restriction on the use of the monopole (rod) antennas for compliance measurements below 30 MHz.

Intentional Radiators - ANSI C63.10-2013, clause 4.3.1 provides information on selecting the correct measurement antenna for radiated emission measurements. Table 1, footnote (b) explains the restriction on the use of monopole (rod) antennas for compliance measurements below 30 MHz.

When performing radiated emission measurements below 30 MHz, use of either an active or passive loop antenna is required. Other information is given in for example KDB Publications 185380, 629601, 937606 about test sites and antennas radiated for emission measurements below 30 MHz.

 



Please use the Submit Inquiry link at www.fcc.gov/labhelp to send any comments or suggestions for this site

Skip FCC Footer and Contact InfoFederal Communications Commission
445 12th Street, SW
Washington, DC 20554
More FCC Contact Information...
Phone:  888-CALL-FCC (225-5322)
TTY:  888-TELL-FCC (835-5322)
Fax:  202-418-0232
E-mail:  fccinfo@fcc.gov
- Privacy Policy
- Web Policies & Notices
- Customer Service Standards
- Freedom of Information Act