Federal Communications Commission 


Before the
Federal Communications Commission
Washington, D.C. 20554


In the Matter of

Modifying Rules for FM Terrestrial Digital Audio Broadcasting Systems
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MB Docket No. 22-405
ERRATUM

Released:  August 15, 2023

By the Chief, Media Bureau:

 	On August 1, 2023, the Commission released an Order and Notice of Proposed Rulemaking, FCC 23-61, in the above-captioned proceeding.  This Erratum amends Appendix A of that release as indicated below.

1. Paragraph (e) of proposed rule (Appendix A) Section 73.404 on page 21, is corrected to read as follows:

(e) All FM stations transmitting hybrid IBOC signals may operate with total effective radiated power of up to -14 dBc.  No station may operate its digital carriers with a total effective radiated power in excess of -10 dBc.  A station using symmetric sidebands planning to operate with a total radiated power in excess of -14 dBc must confirm compliance with Table 1 below by calculating the signal strength of its analog signal at the first adjacent station’s 60 dBµ contour.  All calculations must be made using the standard FCC contour prediction methodology.
Table 1 to Paragraph (e) – Maximum Permissible FM Digital ERP for Symmetric Sideband Operation
Proponent Analog F(50,10) Field Strength at First Adjacent Station’s Analog 60 dBµ F(50,50) Contour (Symmetric Sideband Operation)
Maximum Permissible FM Digital ERP
57.9 dBµ and above
-14 dBc
56.5 dBµ to 57.8 dBµ
-13 dBc
55.6 dBµ to 56.4 dBµ
-12 dBc
54.1 dBµ to 55.5 dBµ
-11 dBc
54.0 dBµ or less
-10 dBc


						FEDERAL COMMUNICATIONS COMMISSION




						HOLLY SAURER 
						CHIEF  
						MEDIA BUREAU


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