ATSC Broadcast Monitors

This system provides 24/7 continuous monitoring and analysis of select broadcasts. The set of monitored broadcasts is constrained by the number of tuners/demodulators in the system and by how well broadcasts are received. In general broadcasts originating from Sutro Tower, San Bruno Mountain, Mount Allison, and Monument Peak are received well at the monitor site in Mountain View, CA.

For more information regarding the monitoring system and the data it provides please see the About pages.

If you would like to have a broadcast added or have suggestions for improving the system drop us a note via the contact page or email.

NextGen TV Arrives in the Bay Area!

It was a bit unexpected. And the programming isn’t exactly a showcase of what NextGen TV can deliver. But at long last the Bay Area has an ATSC 3.0 (aka NextGen TV) broadcast compliments of KBKF! After spending a couple years trekking to Phoenix, Santa Barbara and Las Vegas to go to the emissions it’s nice to have one in our own backyard. And we’re pleased to add ATSC 3.0 monitoring support at SFBayATSC!

KBKF is operated by Venture Technologies Group, LLC and broadcasts on VHF 6 from Loma Prieta. At the time of writing the 3.0 emission consists of a single PLP utilizing 64 QAM and an 8/15 code rate. This is a bit more robust than other 3.0 emissions, which often utilize 256 QAM, though at the expense of a lower capacity (~14 Mbit/s). In mid June two ROUTE/DASH services were being transmitted – a barker channel as 6-1 and UChan as 6-2. At the moment UChan has taken the 6-1 VC and the barker has signed off. Interestingly the services are using AAC audio. While this was prevalent in early 3.0 phases when AC-4 support for receivers and encoders was still under development, commercial deployments in the US use AC-4. (The ATSC 3.0 specification provides for multiple audio codecs, but only a single codec is allowed in a region. In North America that codec is AC-4.)

Spectrum Repack Complete

The spectrum repack reduced the frequencies used for over-the-air television to channels 2 – 36 to make room for other services such as 5G wireless. As a result of the repack stations broadcasting on channels above 36 moved to lower frequencies. Some stations that were broadcasting at channel 36 or below also moved broadcast frequencies, and some stations ceased operation.

Read on for the timeline for the SF Bay Area repack and additional information regarding the repack.


Maintenance History

  • 20210628 – A Winegard HD7000R has been added as the Loma Prieta feed, and RF 6 (ATSC 3.0 KBKF) has been added on that feed.
  • 20210321 – RF 19 (KSTS) has been added to the Fremont feed.
  • 20210321 00:30 – 02:00 – Maintenance – hardware upgrade.
  • 20200728 – RF 34 (KFSF, KDTV) has been added on the Sutro Tower feed.
  • 20200728 – RF 20 (KDTV,KTSF) monitoring has been discontinued due to poor reception.
  • 20200703 – RF 20 (KDTV, KTSF) has been added on the Fremont feed. RF 42 (KTLN) has been discontinued as KTLN is now operating on RF 22 and the RF 42 transmitter has been shut down. Historical data for RF 42 remains available.