
WASHINGTON-NAB, in reply to comments regarding the FCC's TV white space (TVWS) device proposed rulemaking notice, told the commission that consistent with Part 15 rules and as a matter of law that harmful interference from an unlicensed service must not be allowed to cause harmful interference to licensed users.
In the filing, the association said it and Microsoft had worked for several months to negotiate a set of beneficial adjustments to the FCC's existing rules that would allow improvement in TVWS service while protecting TV broadcasters from interference.
Unfortunately, some commenters seek to expand the scope of this proceeding into areas that have already been fully debated and where there have been no new developments that would warrant changes, said NAB in its comments.
The baseline for any adopted rule changes must be that they don't increase the risk of harmful interference, it reiterated.
The association urged the FCC to dismiss what it dubbed extraneous proposals, such as alternative propagation models, power increases and reduced frequency coordination requirements, because the agency cannot conclude they will not increase the potential for harmful interference, the filing said.
PLUS: Senators Push for FCC Action on White Spaces
In opposition to the assertion of the Public Interest Spectrum Coalition (PISC) and the Wireless Internet Service Providers Association (WISPA) that television service is overprotected based on free-space propagation models and worst-case assumptions about TV receiver performance, NAB told the FCC that contour protection is the only reasonable way to protect consumer TV receivers, which operate as hidden nodes.
NAB reminded the FCC that the contours used to protect TV service in an area are from the empirically derived R-6602 propagation curves as codified in the Commission's rules, not on free-space propagation.
Further, it told the FCC that TVWS protection requirements are relaxed when compared to the commission's other broadcast protection rules. It also disputed a WISPA assertion that ATSC 3.0 is more robust against interference, saying there is no basis for the statement.
The Commission should not change its protection methodology with respect to television receivers until a far more substantial technical record based on real world experience with ATSC 3.0 deployments is available, NAB said.
The association told the FCC that it should not permit increased transmitter power for TVWS devices. Doing so inevitably will lead to inadvertent or intentional overpower operation, it said.
NAB also told the commission that it should allow geo-fenced TVWS operation but that restrictions are warranted and that the protection distances for T-Band land-mobile radio protection should be increased.
The association recommended the FCC adopt Microsoft's proposed coordination requirement for TVWS operations where the height above average terrain (HAAT) exceeds 250 meters.
NAB continues to believe that the alternative notification process suggested in the NPRM will lead to interference that will be difficult to identify, it said. However, if the commission favors the notification process rather than Microsoft's proposed coordination procedures, the advanced notice should be longer than 48 hours.
NAB also urged the FCC to maintain rules for first-adjacent channel operation. Microsoft submitted test results it said supported allowing higher power on first-adjacent channels. NAB countered that those tests only used 2018-2019 model TV receivers, which provides no useable information whatsoever with respect to older receivers, NAB said.
Similarly, Microsoft used an ATSC 3.0 dongle costing about $1,000 and marketed as a professional grade receiver to test first-adjacent channels with respect to NextGen TV. The consumer ATSC 3.0 receiver market is plainly in a nascent stage, and without a wider base of tested receivers the Commission cannot draw any conclusions about the susceptibility of future 3.0 receivers to interference, it said.
NAB also asked the commission to reject adjustments to TVWS protections based on the use of directional antennas. While it agrees that directional antennas can reduce the potential for interference, there is absolutely no way of determining whether a directional antenna has been installed properly without the help of a licensed land surveyor, it said.
NAB concluded by urging the FCC to move forward in an expeditious manner with the proposals set forth in the NPRM that are uncontroversial and technically supported.
The NAB comments are available in full online.
North America Stories
28/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
28/05/2026
Riedel Communications today announced that Berliner Ensemble, one of Berlin's five major theater companies, has expanded its backstage communications and te...
28/05/2026
Company's VP Government and International to Address How Broadcasters Can Operationalize Advanced Emergency Information for NextGen TV
Digital Alert Syst...
28/05/2026
Radio BGM (https://radiobgm.org.uk/), Llanellis multiple-award-winning community and hospital radio station, has invested in a DHD SX2 audio mixing console and ...
28/05/2026
Further strengthening its virtualisation strategy to fully support broadcasters as they enter a new broadcast age, Calrec announces an expansion to its ImPulseV...
28/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
28/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
28/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
28/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
28/05/2026
Green Hippo, an ACT Entertainment brand, will pull back the curtain on the Estuary Series, a next-generation media control platform engineered for the scale, sp...
28/05/2026
First Hands-On Opportunity at Universal Studios Lot, June 5-6
Oberkochen, Germany, May 27, 2026 ZEISS is launching their new Panoptes 65 primes at Cine Gear ...
28/05/2026
Irvine, CA May 20, 2026 Wooden Camera today announced the release of new accessories for the Blackmagic URSA Cine Immersive. The new lineup includes a redes...
28/05/2026
Cool Concentric Text for Cavalry
Simon Ubsdell May 27, 2026
0 Comments
In this tutorial I'll show you how to make this popular text effect that is...
28/05/2026
License to stream, shaken and stirred.
GeForce NOW is dialing up the espionage with the launch of 007 First Light, letting members slip into James Bond's r...
28/05/2026
Robotics is entering a new phase: moving from controlled demos and scripted automation toward generalizable, reliable embodied autonomy in the real world.
At ...
28/05/2026
Scripps Research's Skaggs Graduate School awards doctoral degrees to 34th graduating class
May 21, 2026
Scripps Research's Skaggs Graduate School of ...
28/05/2026
Scripps Research chemist Jin-Quan Yu is named a Fellow of the Royal Society Yu is honored by the U.K.'s national academy of sciences for his work in synthet...
27/05/2026
Telestream has announced that its Board of Directors has appointed Benjamin Desbois as Chief Executive Officer, effective July 1, 2026. Desbois, currently Teles...
27/05/2026
ESPN garnered 10 awards; NBC's Sunday Night Football received the Outstandin...
27/05/2026
Matrox Video is celebrating its 50th anniversary, marking five decades of operations from its headquarters in Montreal, Canada. Founded in 1976, the company has...
27/05/2026
Major League Baseball has announced a series of initiatives tied to America's Semiquincentennial, including a national marketing campaign, Fourth of July br...
27/05/2026
Advanced Systems Group (ASG) has announced that Brian Gross has joined the company as an Account Manager on its Audio team, based in the Burbank office. He will...
27/05/2026
Nielsen has released new research on soccer fandom ahead of the FIFA World Cup 2...
27/05/2026
ESL FACEIT Group (EFG) has unveiled a new partnership with TikTok to bring broad...
27/05/2026
FIFA's Oscar Sanchez gives a deeper look to how this tournament will be cove...
27/05/2026
The soon-to-be senior from Charlottesville is building her skills in replay, TD, and even creative content for HokieVision and its ACC Network productions
In t...
27/05/2026
FOX Sports' Mike Davies breaks down the vision for this summer's showcas...
27/05/2026
HBS's Paul King, FIFA's Oscar Sanchez preview how the masses at home wil...
27/05/2026
FOX's MLB coverage dominated the night at the 47th Annual Sports Emmy Awards...
27/05/2026
One of the most memorable Postseasons in baseball history would have had no memo...
27/05/2026
NBC's Sunday Night Football is among the most decorated and most watched programs in the history of television. It added to its jam-packed trophy case on Tu...
27/05/2026
The 2026 Sports Emmys marked a watershed moment for Prime Video Sports. After bu...
27/05/2026
With the Opening Match just over two weeks away, the entire sports-production-te...
27/05/2026
The XL Converge 300P radio system emerges with a groundbreaking feature set enhancing the mission-critical communications of public safety, federal and critica...
27/05/2026
Pairing Two47 MCX software with existing LTE networks means tailored system upgrades that can save time, money and lives....
27/05/2026
PAC-3 MSE offers improved range, speed, and maneuverability, making it an effect...
27/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
27/05/2026
Star Trek VFX: Recreating John Knoll's Iconic Warp Stars without a Slitscan ...
27/05/2026
Adventure World Uses Blackmagic Replay for Marine Live
Brie Clayton May 27, 2026
0 Comments
Large screen displays and slow motion replays dynamically ...
27/05/2026
Berklee Alumna and Assistant Professor Olivia P rez-Collellmir to Premiere Origi...
27/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
27/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
27/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
27/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
27/05/2026
Share
Copy link
Facebook
X
Linkedin
Bluesky
Email...
27/05/2026
Co-founder Dan Castles to transition to Executive Chair; internal promotion reinforces continuity and long-term growth
Telestream, a global leader in media wor...
27/05/2026
Big Blue Marble today announced that its Nakolos platform is the first end-to-end 5G Broadcast solution worldwide to implement the complete feature set introduc...
27/05/2026
Lightware recently hosted the Girls' Day event in April at its headquarters in Budapest, welcoming students for an interactive introduction to engineering a...
27/05/2026
May 27th, 2026 May 27, 2026
Press Materials Available Here
TRIBECA X Announc...