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


Publication Number: 412608 Rule Parts: 24E Publication Date: 03/26/2007
Keyword: Part 24, Part 15, Personal Communications System

First Category: Radio Service Rules
Second Category: Part 24 Personal Communications Service

Question:   During preliminary testing of a Radio Modem, the IF (122.28 MHz) produced harmonics over the FCC Part 15 Class A limits for a digital device. Since the IF is used to operate the PCS amplifier, does the harmonic content of the IF need to be tested under FCC Part 15 unintentional emission requirements or under Part 24E?

Answer:   If the IF card / module is designed and intended to be used with the final amplifier transmitter, then it is to be tested under the Part 24 limits. The spurious emissions from the Part 15 device is subject to the Part 15 rules. If the spurious emission is caused by the simultaneous operation of both devices, the limit is the highest level allowed by either rule part.


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