On October 3rd, National Association of Broadcasters and America's Public Television Stations submitted a petition regarding the expansion of single-frequency networks (SFNs) in relation to ATSC 3.0 deployment across the United States.
While reviewing the petition, FCC is seeking comments from the industry by November 27th.
ATSC 3.0 SFN Monitoring by AVQ1022 RF Signal Analyzer
Link:
https://www.tvtechnology.com/atsc3/fcc-asking-for-comments-on-atsc-3-0-transmission-regs