[opendtv] Re: Technical question on coupon eligible converter boxes

  • From: "John Shutt" <shuttj@xxxxxxxxx>
  • To: <opendtv@xxxxxxxxxxxxx>
  • Date: Mon, 19 Mar 2007 12:36:51 -0400

Good catch, Paul.  Title 47 of the United States Code can be found here:


I think the converter box specs meant 47CFR11.11. Which only means it should display the crawl and the audio.

The only emergency requirement for ATSC receivers can be found in A53, Part 5, section 6.8, which says in part:

"Whenever the E service is present, it will be delivered to the audio decoder. Whenever the audio decoder receives an E type associated service, it will stop reproducing any main service being received and only reproduce the E service out of the center channel (or left and right channels if a center loudspeaker does not exist)."

However, there is no requirement that EAS alerts be flagged as audio type E.


----- Original Message ----- From: "Paul Freeman" <paul@xxxxxxxxxxxxx>
To: <opendtv@xxxxxxxxxxxxx>
Sent: Monday, March 19, 2007 11:14 AM
Subject: [opendtv] Technical question on coupon eligible converter boxes

The specs for the converter boxes eligible for the coupon program state that
boxes must comply with 47CFR11.117 for the Emergency Alert System. I am
trying to determine what this means. CFR is the Code of Federal Regulations.
47CFR is the subset of federal regulations specified by the FCC. And,
47CFR11 is the FCC requirements for the Emergency Alert System. So, so-far,
so-good I guess. But any URL I find on the web for 47CFR11, such as
.pdf, does not have a Section 117.

In general, I am unaware of any Emergency Alert System requirements that
apply to terrestrial receivers, as I believe all the EAS processing happens on the broadcaster side. Cable receivers are different, as they must comply with SCTE 18. That spec allows a cable head-end to broadcast message to the receiver that tell it to force tune to a different channel that is carrying
an emergency alert audio / video message, or to scroll an EAS text message
across the screen. The forced tune operation makes it easier for the head
end to (virtually) transmit an EAS audio / video alert on all channels
simultaneously by instead only transmitting it on one and telling each
receiver to force tune to that channel. But this does not apply to
terrestrial receivers.

Does anybody here know what requirement for EAS is being specified by

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