From Optimizing and Testing WLANs: Proven Techniques for Maximum Performance

This Appendix provides a general guide to the regulatory and standards documents that govern WLAN equipment design and testing.

A.1 FCC Part 15

The Federal Communications Commission (FCC) Part 15 rules-more precisely, Title 47, Part 15, of the US Code of Federal Regulations-govern the operation of unlicensed RF emitters, categorized as unintentional radiators (i.e., devices that emit RF signals as a byproduct of their operation) and intentional radiators (i.e., devices that emit RF signals for the purpose of radio communications). To some extent the Part 15 rules could be considered to have spurred the development of Wireless LANs (WLANs) in the US when the FCC enabled the creation and sale of unlicensed spread-spectrum communications devices in the 2.4 and 5 GHz bands. The Part 15 rules are divided into six subparts:

  • Subpart A lays down general rules for all types of unlicensed emitters, including measurement standards.

  • Subpart B covers unintentional radiators, such as personal computers, TV sets, etc. This subpart is not applicable to WLANs.

  • Subpart C regulates intentional radiators such as WLAN devices, cordless telephones, etc. Section 15.247 in this subpart specifically pertains to WLANs, and Sections 15.207 and 15.209 specify limits on spurious signals emitted outside the WLAN operating bands. Note that this subpart only covers WLAN devices in the 2.400 -2.483 GHz ISM band.

  • Subpart D describes unlicensed personal communications service devices and is not applicable to WLANs.

  • Subpart E regulates unlicensed national information infrastructure (U-NII) devices, which includes WLANs operating in the 5.15, 5.25, and 5.725...

Products & Services
Radio Modems
Radio modems are radio frequency transceivers for serial data. They connect to serial ports (RS232, RS422, etc.) and transmit to and receive signals from another matching radio modem.
Wireless Modems
Wireless modems transmit modulated data using electromagnetic waves.
Field Intensity Meters
Receivers are used to detect buried or hidden piping, equipment or ferromagnetic ores.
RF Power Detector ICs
RF Power Detector IC's. are chips that detect the presence and strength of an RF signals and provide a corresponding output.
Broadcast and Cable Television Service
Broadcast television and cable television service providers transmit television over satellite, cable networks and over open airwaves.

Topics of Interest

Overview The following bibliographic references were found useful when writing this book, and can serve as starting points for further study on any of the topics covered in the preceding chapters.

4.4 Electromagnetic Compatibility Testing Besides measuring RF capabilities to ensure that the performance meets datasheet specifications, it is also necessary to ensure that the system meets the...

For operation within the United States, the Federal Communications Commission (FCC) is responsible for the regulation of all RF devices. These rules are made up of numerous volumes, and unlicensed...

Mourad N. El-Gamal, Tommy K. Tsang 7.1 Introduction The growing number of users and the demand for high-speed wireless communications has motivated designers to move from the 1 2 GHz range towards...

Solutions Fast Track RF Basics Radio signals are basically the propagation of energy using EM waves. Modulating your radio signal allows signals at the same frequency to transmit simultaneously on...