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What is this signal

AH0U
AH0U Member
edited February 2020 in FLEX-6000 Signature Series

What is the signal at 770kc with the strange sidebands... its a local religious stationimage

Answers

  • Bob K8RC
    Bob K8RC Member ✭✭✭
    edited February 2020
    It is "HD" AM Radio. Also know as Hybrid Digital.

    The "pedestals" contain digital data to supplement/replace the analog audio or other information. 

    WLW radio in Cincinnati (700khz/50KW) used to exhibit the same spectrum. Seemly becoming less & less common.
  • AH0U
    AH0U Member
    edited February 2020
    Tnx...... very wide .... who or what received the extra data???
  • Bob K8RC
    Bob K8RC Member ✭✭✭
    edited February 2020
    Specifically designed HD receivers.

  • Mark Erbaugh
    Mark Erbaugh Member ✭✭
    edited February 2020
    Commercially available HD radio receivers. The format is a little more popular on FM broadcasts. The is an open source project on SourceForge, nrcs5, to decode HD FM. I don’t know if it will receive HD on AM.
  • Steve Sterling
    Steve Sterling Member ✭✭
    edited February 2020
    Look in the AM section details of the following:
    https://en.wikipedia.org/wiki/HD_Radio


  • Mark Erbaugh
    Mark Erbaugh Member ✭✭
    edited February 2020
    I misspoke. The project is nrsc5 and is on GitHub

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