What is This Signal Centered on 7.238 Mhz ?

Discussion in 'General Technical Questions and Answers' started by K2WH, Nov 25, 2021.

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  1. K2WH

    K2WH Premium Subscriber QRZ Page

    Very wideband and was wondering what it might be.

    Seems to be at least 10 khz wide or more.

    Attached Files:

  2. KM8V

    KM8V Premium Subscriber QRZ Page

    Sounds like a DRM shortwave broadcast signal
  3. N3RYB

    N3RYB Premium Subscriber QRZ Page

    And we're supposed to avoid QRMing them :)
    AK5B, K8XG and WB5THT like this.
  4. KM3F

    KM3F Ham Member QRZ Page

    Yes that is Digital.
    First time I've heard on 40m in that part of the band.
    At 7 pm eastern standard time on 3965 is a French Digital for about an hour. Look it up.
    Other countries don't respect our frequency assignments or have Ham bands the same in allocation so it's free for all.
    AK5B, K8XG and WB5THT like this.
  5. KD2BD

    KD2BD Ham Member QRZ Page

    Most likely Radio Romania International using DRM (Digital Radio Mondiale) on 7235 kHz.

    I believe this is a Mode B transmission that is 10 kHz wide. Despite having a spectral density that is much higher than that of AM, it is actually no wider than the bandwidth of a standard AM radio broadcast.

    The Global DRM Transmission Schedule can be found here: http://www.hfcc.org/drm/

    73 de John, KD2BD

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