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NRSC Adopts New Guidelines on MDCL Usage for AM, Metadata Distribution

Two documents adopted at 2013 NAB Show NRSC meetings


LAS VEGAS, NV – The National Radio Systems Committee (NRSC), jointly sponsored by the Consumer Electronics Association (CEA) and the National Association of Broadcasters (NAB), today adopted two new NRSC Guideline documents at Subcommittee meetings held in conjunction with the 2013 NAB Show. NRSC Guidelines are informative documents developed to assist radio broadcasters, broadcast equipment manufacturers, and receiver manufacturers in the effective and efficient operation and implementation of local AM and FM radio systems.

The first new Guideline, NRSC-G101, AM Modulation-Dependent Carrier Level (MDCL) Usage Guideline, was adopted by the AM and FM Analog Broadcasting (AFAB) Subcommittee, co-chaired by Stan Salek, Senior Engineer, Hammett & Edison, Sonoma, CA, and Gary Kline, SVP Corporate Director of Engineering & IT, Cumulus Broadcasting, Atlanta, GA. This document provides information on modulation-dependent carrier level (MDCL) technologies available for use by AM broadcasters as a means to reduce electrical power consumption of their facilities which, when used carefully, have little or no impact on the audio quality of AM transmissions.

Also adopted at the Show was NRSC-G301, Creation and Distribution Practices for Audio Program Metadata Guideline, adopted by the Radio Broadcasting Data System (RBDS) Subcommittee, chaired by Dan Mansergh, Director of Engineering, KQED Public Radio, San Francisco, CA. NRSC-G301 sets forth recommendations for creation, packaging, distribution and interpretation of metadata intended for delivery to listeners alongside radio programming, covering methods for managing metadata created both by local broadcasters and networks, independent producers, centralized production facilities or other program sources outside the broadcast station.

These documents will be available free-of-charge on the NRSC’s website (, following a final, procedural review which will take approximately two weeks. Additional information about the NRSC, including information on becoming a member, is also available on the website.

About NAB Show
NAB Show, held April 6-11 in Las Vegas, is the world’s largest electronic media show covering filmed entertainment and the development, management and delivery of content across all mediums. With more than 90,000 attendees from 151 countries and 1,600+ exhibitors, NAB Show is the ultimate marketplace for digital media and entertainment. From creation to consumption, across multiple platforms and countless nationalities, NAB Show is home to the solutions that transcend traditional broadcasting and embrace content delivery to new screens in new ways. Complete details are available at

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About NAB
The National Association of Broadcasters is the premier advocacy association for America’s broadcasters. NAB advances radio and television interests in legislative, regulatory and public affairs. Through advocacy, education and innovation, NAB enables broadcasters to best serve their communities, strengthen their businesses and seize new opportunities in the digital age. Learn more at

About CEA:
The Consumer Electronics Association (CEA) is the preeminent trade association promoting growth in the $209 billion U.S. consumer electronics industry. More than 2,000 companies enjoy the benefits of CEA membership, including legislative advocacy, market research, technical training and education, industry promotion, standards development and the fostering of business and strategic relationships. CEA also owns and produces the International CES – The Global Stage for Innovation. All profits from CES are reinvested into CEA’s industry services. Find CEA online: and Follow CES at and through both CEA and CES social media channels.


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