This document provides links to an ever-increasing number of documents pertaining to radio broadcasting over the past century. These are divided into general subject areas. A single document sometimes may be found under more than one subject. Please be aware that the documents below in most instances do not represent every document released by the Division or Bureau or the Commission about a particular subject.

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AM Expanded Band (1610 to 1700 kHz)

February 1, 2002 Freeze Announced on the Filing of AM Expanded Band Major Change Applications Public Notice, DA 02-239, 17 FCC Rcd 1806, released February 1, 2002 [ PDF  |  Word  |  Text ]. April 28, 1998 Implementation of the AM Expanded Band Allotment Plan MO&O, MM Docket 87-267, FCC 98-69, 13 FCC Rcd 21872, 63 FR 28486, released April 28, 1998 [ PDF  | WP5.1 ]. Two petitions for reconsideration denied. September 26, 1997 First Two AM Expanded Band Applications Granted to Stations in Arvada, Colorado and Lake Oswego, Oregon News Release, released September 26, 1997 [ PDF ]. April 18, 1997 AM Expanded Band Fact Sheet Fact Sheet, released April 18, 1997 [ HTML ]. April 18, 1997 Filing Instructions for AM Expanded Band Allotments Information Sheet, released April 18, 1997 [ HTML ]. March 17, 1997 Mass Media Bureau Announces Revised AM Expanded Band Allotment Plan and Filing Window For Eligible Stations Public Notice, DA 97-537, 12 FCC Rcd 3185, released March 17, 1997 [ PDF ]. This document contains a list of expanded band allotments. March 17, 1997 Implementation of the AM Expanded Band MO&O, MM Docket 87-267, FCC 97-68, 12 FCC Rcd 3361, released March 17, 1997 [ PDF  | WP5.1 ]. March 22, 1996 Comments in Response to Reconsideration of Implementation of the AM Expanded Band Allotment Plan MO&O, MM Docket 87-267, FCC 96-113, 11 FCC Rcd 12444, released March 22, 1996 [ PDF | Word ]. February 2, 1996 Comments in Response to Reconsideration of Implementation of the AM Expanded Band Allotment Plan MO&O, MM Docket 87-267, FCC 96-113, 11 FCC Rcd 12444, released February 2, 1996 [ HTML ]. October 13, 1994 Polnet Communications, Ltd., Licensee of WKTA(AM), Evanston, IL, For Reconsideration of Public Notice Announcing Interference Improvement Factors for Stations Proposing to Migrate to the AM Expanded Band MO&O, FCC 94-257, released October 13, 1994 [ PDF ].

AM Interference Reduction Agreements

May 1, 2003 Pathfinder Communications Corporation [WOWO (AM)] MO&O, FCC 03-104, 18 FCC Rcd 9272, released May 1, 2003 [ PDF | Word ] February 24, 1997 KOFY(AM), San Mateo, CA Letter, released February 24, 1997 [ PDF | Word ] January 16, 1997 WMLZ (AM), Jupiter, FL and WKYB (AM), Hemingway, SC Letter, released January 16, 1997 [ PDF | Word ] December 5, 1996 WWRL (AM), New York, NY Letter, released December 5, 1996 [ Word ] July 18, 1990 Policies to Encourage Interference Reduction Between AM Broadcast Stations R&O, MM Docket 89-46, FCC 90-137, 5 FCC Rcd 4492, released July 18, 1990 [ Scanned ]

AM Radio

July 7, 2005 Letter re NEW (AM), Baldwin, FL Letter, FCC 05-1943, released July 7, 2005 [ PDF | Word ] Major change application for unbuilt AM station to change community of license is dismissed based on Section 307(b) considerations. November 10, 2004 Letter re NEW (AM), Pace, FL Letter, dated November 10, 2004 [ PDF ] Interference protection must be provided to Radio Marti by domestic stations. March 1, 2004 Los Angeles World Airports [WNHV696] MO&O, FCC 03-3843, 18 FCC Rcd 9272, released May 1, 2003 [ PDF | Word ] May 1, 2003 Pathfinder Communications Corporation [WOWO (AM)] MO&O, FCC 03-104, 19 FCC Rcd 4117, released March 4, 2004 [ PDF | Word ] 530 KHz Travellers' Information Station WNHV296 granted a waiver to increase ERP to 100 watts due to terrorism concerns. April 7, 2003 Monroe Area Broadcasters, Inc, Licensee of WRKQ (AM), Madisonville, TN Forfeiture Order, DA 03-1033, 18 FCC Rcd 6255, released April 7, 2003 [ PDF | Word ]. Forfeiture for failing to reduce power at sunset, night operation at daytime power, and failure to identify station by call sign. February 10, 2003 Marshall County Radio Corp., Licensee of WAXO (AM), Lewisburg, TN Forfeiture Order, DA 03-363, 18 FCC Rcd 1588, released February 10, 2003 [ PDF | Word ]. $9,000 forfeiture for failing to enclose its AM tower within a locked fence or other enclosure. March 7, 2001 An inquiry into the Commission's Policy and Rules Regarding AM Radio Service Directional Antenna Performance Verification R&O & Further NPRM, MM Docket 93-177, FCC 01-60, 16 FCC Rcd 5635, released March 7, 2001 [ PDF | Word ]. Erratum, released April 2, 2001: [ PDF ]. June 29, 2000 Reier Broadcasting Company, Inc. KOBB(AM), Bozeman, MT Forfeiture Order, DA 00-1454, 15 FCC Rcd 9165, released June 29, 2000 [ Word  | Text ]. Failure to provide a locked fence around an AM station. July 12, 1999 AM Directional Antenna Stability Assessment Program Code Source Code, released July 12, 1999 via the Internet only. [ HTML ] Source code created in conjunction with the NPRM in MM Docket 93-177 (see the next item). June 11, 1999 An inquiry into the Commission's Policy and Rules Regarding AM Radio Service Directional Antenna Performance Verification NPRM, FCC 99-126, MM Docket 93-177, 64 FR 40539, released June 11, 1999 [ PDF | Word ]. (Comment due date was extended to November 9, 1999 and reply comment date to November 24, 1999 by Order released August 31, 1999: [ PDF | Word ].) February 18, 1999 Hemmingford Media, Inc. (WAPB (AM), Murfreesboro, TN) Forfeiture Order, DA 99-336, released February 18, 1999 [ WP5.1 | Text ]. Not reducing to nighttime power level, public inspection file violations. December 21, 1998 M3 Estimated Effective Ground Conductivity in the United States (A Wall Map) Map, Original HTML page posted December 21, 1998 [ HTML ]. Map portions can be downloaded to form a large map showing the M3 groundwave conductivity lines. March 30, 1998 AM Ground System Correction Factors for Nondirectional AM Stations Information, Original HTML page posted March 30, 1998 [ HTML ]. March 5, 1998 Wings Communications, Inc. (WELE (AM), Ormond Beach, FL) Forfeiture Order, DA 98-427, 13 FCC Rcd 10806, released March 5, 1998 [ WP5.1 | Text ]. AM station equipment performance measurements per 47 CFR 73.1590(a)(6). December 23, 1997 Delta Radio Corp. (KELE (AM), Sikeston, MO) Forfeiture Order, DA 97-2666, released December 23, 1997 [ WP5.1 | Text ]. Out of tolerance operation. October 2, 1997 Letter to Southwestern Bell Mobile Systems Letter, released October 2, 1997 [ HTML | Word ] Nonbroadcast tower construction near an AM tower. February 4, 1997 Fayetteville Cellular Telephone Company L.P. (KNKA485) MO&O, DA 97-208, 12 FCC Rcd 1385, released February 4, 1997 [ PDF | Scanned ] Forfeiture for tower construction near an AM directional array without notice to the AM station. See also the September 26, 1996 NALF, 11 FCC Rcd 12266: [ PDF | Scanned ]. November 23, 1993 Establish a Single AM Radio Stereophonic Transmitting Equipment Standard R&O, ET Docket 92-298, FCC 93-485, 8 FCC Rcd 8216, released November 23, 1993 [  PDF ] See also the April 24, 1994 Supplemental Order to Docket 92-298: [ PDF ]. July 18, 1990 Improved Methods for Calculating Groundwave Field Strength in the AM Broadcast Band R&O, MM Docket 88-510, FCC 90-139, 5 FCC Rcd 4489, released July 18, 1990 [  Scanned ] See also the groundwave curves and the M3 conductivity map July 18, 1990 Improved Methods for Calculating Skywave Field Strength in the AM Broadcast Band R&O, MM Docket 88-508, FCC 90-138, 5 FCC Rcd 4482, released July 18, 1990 [  PDF ]  See also the November 4, 1988 NPRM in MM Docket 88-508: [ PDF ]. July 18, 1990 Policies to Encourage Interference Reduction Between AM Broadcast Stations R&O, MM Docket 89-46, FCC 90-137, 5 FCC Rcd 4492, released July 18, 1990 [ Scanned ] See also the topic AM Interference Reduction Agreements. December 1, 1987 Unlimited-time Operation by Existing AM Daytime-Only Radio Broadcast Stations; Discontinuance of Authorization of Additional Daytime-Only Stations; Minimum Power of Class III Stations R&O, MM Docket 87-131, FCC 87-356, 2 FCC Rcd 7113, released December 1, 1987 [  PDF ]     December 10, 1997 Erratum: [ PDF ]     June 15, 1998 Erratum: [ PDF ]     February 22, 1989 MO&O: [ PDF ] No new AM daytime-only stations will be authorized. January 10, 1986 Meter orientation when taking AM field strength measurements Letter, released January 10, 1986 [ PDF ] October 11, 1985 The Application Process and the Use of Non-Discrete Power Levels for AM Stations Public Notice, Reference No. 0257, released October 11, 1985 [ PDF ]. October 25, 1984 Protection Standards for AM Stations in Alaska R&O, MM Docket 83-807, FCC 84-489, 99 FCC 2d 77, released October 25, 1984 [ PDF ]. August 14, 1984 Amendment of Parts 2 and 73 of the Commission's Rules Concerning the Use of the AM Carrier R&O, MM Docket 83-1322, FCC 84-301, 100 FCC 2d 5, released August 14, 1984 [ PDF ]. April 13, 1984 Hours of Operation of Daytime-only AM Broadcast Stations; Amendment of Section 73.81 of the Commission's Rules (Hours of Operation of Dominant and Secondary Stations) MO&O, BC Docket 82-538 and Docket 18421, FCC 84-157, 97 FCC 2d 657, released April 13, 1984 [ PDF ]. March 9, 1981 Amendment of Section 73.99 R&O, BC Docket 80-244, FCC 81-80, 85 FCC 2d 709, released March 9, 1981 [ PDF ]. Uniform 6:00 AM presunrise operation start time for certain AM stations. February 9, 1981 Amendment of the Rules Governing the Conversion of Radiation Patterns [to standard patterns] in the AM Broadcast Service R&O, Docket 21473, FCC 81-45, 84 FCC 2d 796, released March 9, 1981 [ PDF ] 3.9 MB.. Standard radiation patterns for AM broadcast stations. December 6, 1979 Letter to Donald G. Everist, Chairman, FCC Processing and Procedure Committee, AFCCE, from Richard J. Shiben, Chief, Broadcast Bureau Letter, released December 6, 1979 [ Scanned ]. "Direct Ratio method" for AM monitoring point measured field strengths. Related News Release dated December 7, 1979: [ PDF ]. December 18, 1968 B&W Truck Service Letter, FCC 68-1209, 15 FCC 2d 769, dated December 18, 1968 [ PDF ]. New tower caused distortion of KCRC (AM) directional pattern; B&W Truck Service was ordered to fix the problem. September 13, 1961 Clear Channel Broadcasting in the Standard Broadcast Band R&O, Docket 6741, FCC 61-1106, 31 FCC 565, 21 RR 1801, adopted September 13, 1961 [ PDF ]. Revised rules for 13 clear channel frequencies; 13 new Class II assignments must protect Class I station's service out to roughly 700 miles. Educational reservations on the AM Band denied. Supplement to R&O released October 27, 1961, 31 FCC 902: [  PDF ] February 24, 1954 Amendment of Part 3 (Radio Broadcast Services) ... Concerning Standard Broadcast Stations R&O, 43 FCC 2d 2250, 10 RR 1538, adopted February 24, 1954 [ PDF ] M3 ground conductivity map adopted. October 8, 1952 Physical Limitations to Directional Antenna Systems in the Standard [AM] Broadcast Band Report, FCC Office of Chief Engineer, Technical Research Division, T.R.R. Report No. 1.2.6., released October 8, 1952 [ PDF ] Authored by Harry Fine.

Antenna Structure Registration

February 9, 1999 FM Broadcast Station KNEC [FM], Arnold Broadcasting Company, Inc. Forfeiture Order, DA 00-225, 15 FCC Rcd 2704, released February 9, 2000 [ PDF | Word | Text ]. Related orders. June 21, 1999 Commission Announces New Procedures for Antenna Structure Registration Public Notice, DA 99-1186, released June 21, 1999 [ WP5.1 | Text ]. Revised Form 854, Taxpayer Identification Numbers (TIN) required. December 4, 1998 FCC Audit of Antenna Structures Indicates Poor Compliance With Registration Rules News Release, Report No. CI 98-28, released December 4, 1998 [ PDF | Word ]. July 19, 1996 Antenna Structure Registration Procedures Clarified Public Notice, 11 FCC Rcd 8653, released July 19, 1996 [ PDF ]. June 13, 1996 Antenna Structure Registration Number Required As Supplement to FCC Application Forms Effective July 1, 1996 Public Notice, released June 13, 1996 [ PDF ].

Auxiliary (or Backup) Facilities

April 3, 1998 1998 Biennial Regulatory Review -- Streamlining of Mass Media Applications, Rules and Processes NPRM, MM Docket 98-43, FCC 98-57, 13 FCC Rcd 11349, released April 3, 1998 [ PDF | Word ]. August 22, 1997 Certain Minor Changes in Broadcast Facilities Without a Construction Permit R&O, FCC 97-290, 12 FCC Rcd 12371, 62 FR 51052, released August 22, 1997 [ PDF | Word ]. October 04, 1995 Letter re proposed auxiliary facility for WMHK Letter, released October 4, 1995 [ HTML ]. Waiver request denied to allow extension of the auxiliary facility's 60 dBu contour beyond the main station's 60 dBu contour. September 26, 1994 KKLF (FM), Gonzales, CA Letter, released September 26, 1994 [ PDF | HTML ]. 8 radials insufficient: use as many radials as necessary to accurately locate the contours.

Contour Protection

Section 73.215 for Commercial FM Stations April 13, 2004 R&S Media [KBNH (FM), Homedale, ID] Memorandum Opinion and Order and Order to Show Cause, , DA 04-960, , released April 13, 2004 [ PDF  | Word ]. Waivers of Section 73.215(a) and (e); Section 316 of the Communications Act. November 11, 2000 1998 Biennial Regulatory Review -- Streamlining of Radio Technical Rules in Parts 73 and 74 of the Commission's Rules Second R&O, MM Docket 98-93, FCC 00-368, 15 FCC Rcd 21649, released November 11, 2000 [ Word  | Text ]. 47 CFR Section 73.215(e) revised, also 73.215 for PR & VI stations February 11, 2000 Table of Allotments, Buras, LA R&O, MM Docket 99-204, DA 00-256, released February 11, 2000 [ Word  | Text ]. No site available for allotment (swampland). October 1, 1999 Greater Media Radio Company, Inc. [WPLY-FM, Media, PA] MO&O, FCC 99-226, 15 FCC Rcd 7090, released October 1, 1999 [ Word  | Text ]. See also the MO&O released October 20, 2000, FCC 00-128, 15 FCC Rcd 20485, denying appeal: [ Word ]. June 15, 1998 1998 Biennial Regulatory Review -- Streamlining of Radio Technical Rules in Parts 73 and 74 of the Commission's Rules NPRM, MM Docket 98-93, FCC 98-117, 13 FCC Rcd 14849, 63 FR 33892, released June 15, 1998 [ PDF (includes appendices) | WP5.1 | Text ]    Appendices: [ WP5.1 ] Related information about the proposed point-to-point contour calculation method is located at http://www.fcc.gov/mb/audio/ptp/index.html and http://www.fcc.gov/oet/fm/ptp/. The comment due dates were extended by the July 23, 1998 Order, DA 98-1468, 13 FCC Rcd 13513: [ WP5.1 | Text ]. August 22, 1997 Certain Minor Changes in Broadcast Facilities Without a Construction Permit R&O, FCC 97-290, 12 FCC Rcd 12371, 62 FR 51052, released August 22, 1997 [ WP5.1 | Text ]. September 27, 1996 Thunderbolt Broadcasting (WCDZ, Dresden, TN) Letter, released September 27, 1996 [ HTML ]. Application for review denied April 1, 1998. March 21, 1996 ECI License Corporation [WYUU (FM), Safety Harbor, FL] MO&O, 96-83, 11 FCC Rcd 3545, released March 21, 1996 [ HTML ]. Decision affirmed by D.C. Cir. Court of Appeals, Case No. 96-1122, 323 U.S.App.D.C. 173, 106 F.3d 442, December 26, 1996. September 5, 1995 Letter re: WVZA (FM), Herrin, IL Letter, , , released September 5, 1995 [ PDF ]. Class A to B1 one step upgrade; waiver of Section 73.215(a) denied regarding prohibited contour overlap. November 18, 1993 Letter re KVYZ (FM), Thousand Palms, CA Letter, released November 18, 1993 [ PDF ]. Once station is authorized under the contour protection rule (Section 73.215)toward a grandfathered short-spaced station, the contour protection station cannot later use Section 73.213 toward the grandfathered station. September 27, 1993 WAVI (FM), Christiansted, VI Letter, 8 FCC Rcd 7329, released September 27, 1993 [ HTML ]. Procedures for Section 73.215 contour protection in Puerto Rico and the U.S. Virgin Islands. Later adopted as a rule revision to 47 CFR 73.215. October 5, 1992 Short-Spaced FM Station Assignments by Using Directional Antennas Order, MM Docket 87-121, DA 92-1325, 7 FCC Rcd 6473, 57 FR 46325, released October 5, 1992 [ Scanned ]. Temporary note to 47 CFR 73.215(e) limiting spacing was removed. September 17, 1991 Short-Spaced FM Station Assignments by Using Directional Antennas MO&O, MM Docket 87-121, FCC 91-273, 6 FCC Rcd 5356, released September 17, 1991 [ PDF ].     Erratum of October 9, 1991, 6 FCC Rcd 5777: [ PDF ]     Erratum of November 8, 1991, 6 FCC Rcd 6537: [ PDF ]     February 22, 1989 Short-Spaced FM Station Assignments by Using Directional Antennas R&O, MM Docket 87-121, FCC 88-406, 4 FCC Rcd 1681, 54 FR 09800, released February 22, 1989 [ Scanned ]. Contour protection for commercial FM stations first adopted.

Next subject Previous subject Section 73.509 for Noncommercial Educational FM Stations January 5, 2005 Lakeside Communications, Inc. MO&O, , FCC 04-298, 20 FCC Rcd 763, released January 5, 2005 [ PDF  | Word ]. Co-channel waiver requestof Section 73.509 denied for a Class D station applying for Class A facilities. November 11, 2000 1998 Biennial Regulatory Review -- Streamlining of Radio Technical Rules in Parts 73 and 74 of the Commission's Rules Second R&O, MM Docket 98-93, FCC 00-368, 15 FCC Rcd 21649, released November 11, 2000 [ Word  | Text ]. 47 CFR Section 73.509 revised to use 100 dBu interfering contour for second-adjacent channel noncommercial educational FM stations. June 15, 1998 1998 Biennial Regulatory Review -- Streamlining of Radio Technical Rules in Parts 73 and 74 of the Commission's Rules NPRM, MM Docket 98-93, FCC 98-117, 13 FCC Rcd 14849, 63 FR 33892, released June 15, 1998 [ PDF (includes appendices) | WP5.1 | Text ]    Appendices: [ WP5.1 ] Related information about the proposed point-to-point contour calculation method is located at http://www.fcc.gov/mb/audio/ptp/index.html and http://www.fcc.gov/oet/fm/ptp/. The comment due dates were extended by the July 23, 1998 Order, DA 98-1468, 13 FCC Rcd 13513: [ WP5.1 | Text ]. November 12, 1997 NEW (FM), Cabo Rojo, PR Letter, released November 12, 1997 [ HTML | WP5.1 ] Denied request for an Order to Show cause to modify another FM noncommercial educational station's frequency so that this application could be accepted. October 30, 1997 NEW (FM), Orland Park, IL Letter, released October 30, 1997 [ HTML | WP5.1 ] Service contour wholly within interference contour of another station; waiver request denied. August 22, 1997 Certain Minor Changes in Broadcast Facilities Without a Construction Permit R&O, FCC 97-290, 12 FCC Rcd 12371, 62 FR 51052, released August 22, 1997 [ WP5.1 | Text ]. May 20, 1997 Educational Information Corporation (WCPE) MO&O, FCC 97-170, 12 FCC Rcd 6917, released May 20, 1997 [ WP5.1  | Text ] 0.8% increase in service area does not justify waiver of 47 CFR 73.509 to cause prohibited contour overlap. Application for review denied. November 12, 1996 NEW (FM), Bernalillo, NM Letter, released November 12, 1996 [ HTML ] Request for waiver of 47 CFR 73.509 to allow colocated third-adjacent channel FM educational stations denied. October 21, 1996 NEW (FM), Pollock Pines, CA Letter, released October 21, 1996 [ HTML ] Request for waiver to create a new "hole" of interference in another station's service area was denied. September 26, 1996 Saddleback Community College (KSBR) MO&O, FCC 96-369, 11 FCC Rcd 11938, released September 26, 1996 [ HTML | WP5.1  | Text ] July 2, 1996 Board of Education of the City of Atlanta (WABE (FM)) MO&O, FCC 96-20 11 FCC Rcd 7763, released July 2, 1996 [ PDF ] Denial of request for waiver to cause prohibited cochannel overlap affirmed, even where other station has consented to the overlap. June 15, 1993 Open Media Corporation MO&O, FCC 93-301, 8 FCC Rcd 4070, released June 15, 1993 [ PDF ] Contour overlap waiver denied: programming or ownership not basis for contour overlap waiver; increased coverage at the expense of objectionable interference alone does not justify waiver. March 9, 1993 Lehigh Valley Community Broadcasters Board of Directors [ NEW (FM), Allentown, PA] HDO, MM Docket 93-37, FCC 93-154, 8 FCC Rcd 1643, released March 9, 1993 [ HTML ] Received prohibited contour overlap encompasses 58% of proposed service contour; request for waiver (on reconsideration) denied. April 24, 1991 Educational Information Corporation [WCPE] MO&O, FCC 91-304, 6 FCC Rcd 2207, released April 24, 1991 [ PDF ] Waivers of second and third adjacent channel overlap may be considered for existing stations where there "the benefit of increased noncommercial educational service so heavily outweighs the potential for interference in very small areas."

Development of FM and TV Propagation Curves

June 15, 1998 1998 Biennial Regulatory Review -- Streamlining of Radio Technical Rules in Parts 73 and 74 of the Commission's Rules NPRM, MM Docket 98-93, FCC 98-117, 13 FCC Rcd 14849, 63 FR 33892, released June 15, 1998 [ PDF (includes appendices) | WP5.1 | Text ]    Appendices: [ WP5.1 ] Related information about the proposed point-to-point contour calculation method is located at http://www.fcc.gov/mb/audio/ptp/index.html and http://www.fcc.gov/oet/fm/ptp/. The comment due dates were extended by the July 23, 1998 Order, DA 98-1468, 13 FCC Rcd 13513: [ WP5.1 | Text ]. January 1976 Field Strength Calculation for TV and FM Broadcasting Report, FCC/OCE RS76-01, by Gary S. Kalagian. released January 1976 [ Scanned ] FM and TV propagations curves program. November 5, 1975 Temporary Suspension of Certain Portions of Sections 73.313, 73.333, 73.684 and 73.699 Order, FCC 75-1226, 56 FCC 2d 749, released November 5, 1975 [ PDF | Scanned ] The 1975 suspension of the use of the terrain roughness correction factor remains in effect today. June 27, 1975 Amendment of Sections 73.333 and 73.699 Field Strength Curves for FM and TV Broadcast Stations [Docket 16002]; Amendment of Part 73 of the Rules Regarding Field Strength Measurements for FM and TV Broadcast Stations [Docket 18052] R&O, Dockets 16002 and 18052, FCC 75-636, 53 FCC 2d 855, released June 27, 1975 [ PDF ]. FM and TV field strength curves were revised. Terrain roughness factor adopted [later suspended, November 5, 1975]. September 7, 1966 Development of VHF and UHF Propagation Curves for TV and FM Broadcasting Report, Report No. R-6602, released September 7, 1966 [ Scanned ] September 28, 1944 VHF Radio Field Strength Measurements 1943-1944 Exhibit No. 4, Docket No. 6651, 39 FCC 171, released September 28, 1944 [ Scanned ] September 28, 1944 Very-High-Frequency and Ultra-High-Frequency Signal Ranges as Limited by Noise and Co-channel Interference Exhibit No. 593, Docket No. 6651, 39 FCC 202, released September 28, 1944 [ Scanned ]

Digital Radio Broadcasting in the USA

Related information can be found on the digital radio page. April 20, 2004 Digital Audio Broadcasting Systems And Their Impact on the Terrestrial Radio Broadcast Service Further NPRM and NOI, , FCC 04-99, released April 20, 2004 [ PDF | Word ]. Comments due by June 16, 2004; reply comments due July 16, 2004. April 14, 2004 Comment Sought on Use of Digital AM Transmissions During Nighttime Hours Public Notice, DA 04-1007, released April 14, 2004 [ PDF | Word ] Comments due by June 14, 2004; reply comments due July 14, 2004. March 17, 2004 Use of Separate Antennas to Initiate Digital FM Transmissions Approved Public Notice, DA 04-712, released March 17, 2004 [ PDF | Word ] Special Temporary Authority (STA) must be requested and granted before digital FM operations can commence. December 8, 2003 Comment Sought on Use of Separate Antennas to Initiate Digital FM Systems Public Notice, DA 03-3898, released December 8, 2003 [ PDF | Word ] Comments sought by January 8, 2004; reply comments by January 23, 2004. Subject is the NAB's July 24, 2003 report (PDF, 113 pages) on the use of separate antennas for digital FM broadcasting. March 24, 2003 Interference Immunity Performance Specifications for Radio Receivers / Review of the Commission's Rules and Policies Affecting the Conversion to Digital Television NOI, ET Docket 03 - 65 / MM Docket 00-39, FCC 03-54, released March 24, 2003 [ PDF | Word ] Commissioners' statements (PDF): [ Powell  |  Abernathy  |  Copps  |  Martin  |  Adelstein ] March 20, 2003 IBOC Notification Procedures Effective Immediately Public Notice, DA-03-831 released March 20, 2003 [ PDF | Word ] AM & FM stations implementing IBOC hybrid digital operation must notify the FCC within 10 days of commencing such operation, using the notification form in this Public Notice. October 11, 2002 Digital Audio Broadcasting Systems And Their Impact on the Terrestrial Radio Broadcast Service First R&O, MM Docket 99-325, FCC 02-286, 17 FCC Rcd 19990, released October 11, 2002. [ PDF | Word | Text ] FM IBOC Specifications (Appendix B): [ PDF | Word | Text ] AM IBOC Specifications (Appendix C): [ PDF | Word | Text ] October 10, 2002 FCC Selects Digital Radio Technology; Authorizes AM and FM Interim, Voluntary Digital Operation News Release, MM Docket 99-325, released April 19, 2002 [ PDF | Word | Text ] Commissioners' Statements: Abernathy & Martin: [ PDF | Word | Text ] Copps: [ PDF | Word | Text ] April 19, 2002 Comment Sought on National Radio Systems Committee DAB Subcommittee's "Evaluation of the Ibiquity Digital Corporation IBOC System [regarding AM In-Band On-Channel Digital Radio Broadcasting] Public Notice, MM Docket 99-325, DA 02-899, released April 19, 2002 [ PDF | Word | Text ]. Comments were due by June 18, 2002, reply notes were due by July 18, 2002. November 1, 1999 Digital Audio Broadcasting Systems And Their Impact on the Terrestrial Radio Broadcast Service NPRM, MM Docket 99-325, FCC 99-327, 64 FR 61054, released November 1, 1999 [ Word | Text ]. October 7, 1998 Amendment of Part 73 of the Commission's Rules to Permit the Introduction of Digital Audio Broadcasting in the the AM and FM Broadcasting Services [USADR Petition] Petition for Rulemaking, RM-9395, filed October 7, 1998 [ PDF ]. This document initiated MM Docket 99-325.

Directional Antennas

AM Directional Antennas July 7, 2003 Amendment of Sections 73.62 and 73.1350 of the Ciommission's Rules [for AM directional broadcast stations] NPRM, MB Docket 03-151, FCC 03-160, released July 7, 2003 [ PDF | Word ]. Consideration of procedures when AM directional stations cannot be maintained within tolerances. Comments due by August 29, 2003, reply comments due September 18. 2003. March 7, 2001 An inquiry into the Commission's Policy and Rules Regarding AM Radio Service Directional Antenna Performance Verification R&O & Further NPRM, MM Docket 93-177, FCC 01-60, released March 7, 2001 [ Word | Text ]. Erratum, released April 2, 2001: [ Word ]. July 12, 1999 AM Directional Antenna Stability Assessment Program Code Source Code, released July 12, 1999 via the Internet only. [ HTML ] Source code created in conjunction with the NPRM in MM Docket 93-177 (see the next item). June 11, 1999 An inquiry into the Commission's Policy and Rules Regarding AM Radio Service Directional Antenna Performance Verification NPRM, FCC 99-126, MM Docket 93-177, 64 FR 40539, released June 11, 1999 [ Word  | Text ]. Comment due date was extended to November 9, 1999 and reply comment date to November 24, 1999 by Order released August 31, 1999: [ WP5.1 | Text ]. June 19, 1998 Polnet Communications, Ltd. [WKTA (AM), Evanston, IL] Forfeiture Order, DA 98-1189, released June 19, 1998 [ WP5.1 | Text ]. May 8, 1998 Bronco Broadcasting Co., Inc., [KIRL (AM), St. Charles, MO] Forfeiture Order, DA 98-866, released June 19, 1998 [ WP5.1 | Text ]. December 9, 1985 Criteria for Approval of Sample Systems for Directional AM Broadcast Stations Public Notice, released December 9, 1985 [ PDF ]. December 6, 1979 Letter to Donald G. Everist, Chairman, FCC Processing and Procedure Committee, AFCCE, from Richard J. Shiben, Chief, Broadcast Bureau Letter, BC Docket 82-538 and Docket 18421, FCC 84-157, 97 FCC 2d 657, released December 6, 1979 [ Scanned ]. "Direct Ratio method" for AM monitoring point measured field strengths. Related News Release dated December 7, 1979: [ PDF ]. February 12, 1976 Sampling System Design and Installation for AM Directional Antennas -- Excerpts from "Design and Installation of Sampling Systems for Antenna Monitors in Standard Broadcast Stations With Directional Antennas" R&O, Docket 19692, FCC 76-101, 57 FCC 2d 1085, released February 12, 1976 [ HTML ]. These considerations remain valid today.

Next subject Previous subject FM Directional Antennas April 3, 1998 1998 Biennial Regulatory Review -- Streamlining of Mass Media Applications, Rules and Processes NPRM, MM Docket 98-43, FCC 98-57, 13 FCC Rcd 11349, released April 3, 1998 [ WP5.1 ]. August 22, 1997 Certain Minor Changes in Broadcast Facilities Without a Construction Permit R&O, Docket 96-58, FCC 97-290, 12 FCC Rcd 12371, 62 FR 51052, released August 22, 1997 [ WP5.1 | Text ]. October 24, 1996 FM Directional Antenna Program Test Authority Requirements Web page, posted October 24, 1996 [ HTML ]. Updated. June 21, 1993 Amendment of Section 73.316(a) of the Commission's Rules Order, RM-7566, FCC 93-306, 8 FCC Rcd 4166, released June 21, 1993 [