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Mystery 10k wide digital mode on 3.950USB

Lee Maisel
Lee Maisel Member
edited June 2020 in FLEX-6000 Signature Series
went on continuously for at least 30 minutes. could be longer but i had things to do. looked and sounded like easypal, except it was a full 10k wide and well defined.

Its a mystery! image

Answers

  • Ken - NM9P
    Ken - NM9P Member ✭✭✭
    edited June 2020
    It looks like it could be a DRM shortwave broadcast signal.  I have heard one reported on the high end of 80 before.

    Ken - NM9P
  • Steve Yothment
    Steve Yothment Member
    edited April 2016

    Yes, that's Digital Radio Mondiale.  Check the schedule here:  http://www.hfcc.org/drm/. 

    BBC World Service is on DRM on 3955 kHz at 0500Z to 0600Z.

    - Steve  W4OGM

  • Lee Maisel
    Lee Maisel Member
    edited April 2016
    Hmmm I thought that too but could not decode at all.
  • Lee Maisel
    Lee Maisel Member
    edited June 2020
    I am using DREAM  maybe I have the flex 6500 setup wrong?

  • Ken - NM9P
    Ken - NM9P Member ✭✭✭
    edited December 2016
    The last time I tried to use DReaM I couldn't get anything to decode.  Apparently I need to compile an AAC Codec.  After trying unsuccessfully to find one online, or an easy way to make one, I lost interest and went on to other pursuits.  

    Apparently there are others who have had more luck and are enjoying DRM.  I would like to hear from them.  It seems like a good project for the Flex.  

    Ken - NM9P

  • Steve Yothment
    Steve Yothment Member
    edited April 2016

    I receive DRM with my Flex-3000.  I use the DRM Software from VT Merlin Communications and the decoding works OK, but the SNR has to be 15dB or more for a decent decode.  The signal on 3955 kHz shown in the picture above is too weak to decode. 

    The downside of receiving DRM is that you have to pay a license fee to decode it, but once you do that you are ready to go.

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