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Shortwave Data Decoding - Discussions regarding decoding digital signals on the HF bands, including HFDL, ALE, RTTY, CW, and others.

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Old 04-21-2018, 10:26 AM
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Default 9.830 LSB

Has anyone been hearing what sounds like a steady data stream on 9.830 LSB. Very strong signal. 1500 UTC.
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Old 04-21-2018, 2:12 PM
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Without an audio example or a general area of the receiver you are using it is dificult to say with any certainty, however 9830 kHz c/f often has STANAG 4481 FSK. That might be a candidate for your data.

T!
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Old 04-21-2018, 3:00 PM
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There were a couple of logs on the UDXF last year that suggest this might be NAU Puerto Rico using NATO-75 cypher. In other words, not readable by the likes of us :.>>

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Old 04-21-2018, 3:18 PM
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Thanks for the reply guys, I haven't ever heard it before. Just happened to be out in the yard (central Iowa) with the Skywave (Ccrane) this morning. I wasn't really sure where to post the question , since it was right where broadcast SW is supposed to be. I know how that goes though ,in the SW bands "supposed" doesn't always mean much. Mike
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Old 04-21-2018, 5:34 PM
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We don't post by frequency range, but by the mode and intent; here, even tho it was in the 31mb, it was clearly digital, which is why it's here. But thanks for the interesting log anyhow. Sorry to see that it's what I like to call 'MCC' - Militarily Coded (you can fill in the rest)' ..heh

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