[opendtv] Re: FCC rules for digital radio

  • From: "John Limpert" <john.a.limpert@xxxxxxxxx>
  • To: opendtv@xxxxxxxxxxxxx
  • Date: Sat, 24 Mar 2007 23:15:14 -0400

Many AM stations have to shutdown at night.

Wasn't there a restriction against nighttime AM digital operation, as it
hadn't been properly tested for those propagation modes (skywave) and the
effects on other stations were unknown.

On 3/24/07, Albert Manfredi <bert22306@xxxxxxxxxxx> wrote:

This new set of rules for digital audio broadcast:

http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-271699A1.pdf

includes a couple of interesting items:

1. Still no schedule imposed on analog radio shutoff.

2. Digital radio stations are to simulcast an analog program, and the
digital stream has to be of comparable quality. (The multicast streams are
presumably not included in this rule.)

3. AM can now transmit digitally even at night? That's really odd,
although
ambiguously worded as, "Authorizes AM nighttime operations." Some might
argue that AM at night has bee allowed for many decades.

Bert

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