{"id":58339,"date":"2023-12-04T02:00:00","date_gmt":"2023-12-04T06:00:00","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=58339"},"modified":"2023-12-03T10:36:22","modified_gmt":"2023-12-03T14:36:22","slug":"patrizio-seeks-information-about-mystery-signals-hes-discovering-across-the-hf-bands","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2023\/12\/patrizio-seeks-information-about-mystery-signals-hes-discovering-across-the-hf-bands\/","title":{"rendered":"Patrizio seeks information about mystery signals he’s discovering across the HF bands"},"content":{"rendered":"

\"\"<\/a><\/p>\n

Many thanks to SWLing Post<\/em> contributor, Patrizio Cardelli, who has discovered some interesting signals on the HF bands and is seeking information about them. <\/strong><\/p>\n

A little background: Patrizio asked me about these signals a few weeks ago and based on a quick glance at the spectrum and waterfall images I assumed it was DRM (Digital Radio Mondiale). I was wrong, of course. Had I looked at the actual frequency and bandwidth, I would have immediately realized is was not<\/em> DRM. My email load has been so heavy as of late, and my time to reply at such a premium, I rushed through the reply–my apologies, Patrizio!<\/strong><\/p>\n

Patrizio followed up with this message:<\/strong><\/p>\n

Hello Thomas,<\/p>\n

I hope this message finds you well. I wanted to share my recent radio exploration based on your advice. I followed your suggestion and investigated a sample signal within the 60-meter band, specifically settling on the one at 4.962 kHz.<\/p>\n

I attempted to decode it using the Dream software but encountered no success. It seems this isn’t a Digital Radio Mondiale (DRM) transmission. To rule out local QRM (interference), I tested various Kiwi SDR receivers across Europe, both to the south and north of my QTH. Interestingly, I managed to pick up this signal everywhere, with a stronger intensity noted in the northern locations.<\/p>\n

\"\"<\/a><\/p>\n

I’m eager to publish this article to find out if other Shortwave Listeners (SWL) have been able to decode this transmission. Additionally, I’d like to mention that similar signals, either continuous or intermittent, are present on various HF frequencies.<\/p>\n

\"\"<\/a><\/p>\n

I look forward to any insights or experiences others in the community might have regarding this intriguing signal.<\/p>\n

Audio sample:<\/strong><\/h1>\nhttps:\/\/swling.com\/blog\/wp-content\/uploads\/2023\/12\/UNKNOW-SIGNAL-2.mp3<\/a><\/audio>\n

While I recognize these signals now, and I’m sure most of you who cruise the bands have seen\/heard these as well, Patrizio is a relatively new SWL, turns out, and I thought it might be fun exploring just what these signals are.\u00a0<\/strong><\/p>\n

Readers: If you know what these signals are, please comment. Indeed, I’m sure there are a number of SWLing Post readers who have hands-on time with generating these signals as well in a past life or current career. Let’s explore!<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"

Many thanks to SWLing Post contributor, Patrizio Cardelli, who has discovered some interesting signals on the HF bands and is seeking information about them. A little background: Patrizio asked me about these signals a few weeks ago and based on a quick glance at the spectrum and waterfall images I assumed it was DRM (Digital […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[1114,3,9589],"tags":[2376,5448,8496,3627],"class_list":["post-58339","post","type-post","status-publish","format-standard","hentry","category-digital-modes","category-news","category-utility","tag-2013-shortwave-radio-gift-guide","tag-mystery-signals","tag-patrizio-cardelli","tag-utility"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-faX","jetpack-related-posts":[{"id":59538,"url":"https:\/\/swling.com\/blog\/2024\/04\/patrizio-receives-detailed-information-about-the-woofferton-test-transmission-he-confirmed\/","url_meta":{"origin":58339,"position":0},"title":"Patrizio receives detailed information about the Woofferton test transmission he confirmed","author":"Thomas","date":"April 21, 2024","format":false,"excerpt":"Many thanks to SWLing Post contributor, Patrizio Cardelli, who shares the following background story (via our friend, Dave Porter) about a Woofferton test transmission received at his QTH in Italy: Hi Patrizio, Thank you for your report and I confirm the details for 9885 kHz are correct. These transmissions were\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Woofferton_transmitting_station_2011.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Woofferton_transmitting_station_2011.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Woofferton_transmitting_station_2011.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/10\/Woofferton_transmitting_station_2011.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":56624,"url":"https:\/\/swling.com\/blog\/2023\/05\/patrizio-uses-speechtexter-to-translate-foreign-broadcast-content\/","url_meta":{"origin":58339,"position":1},"title":"Patrizio uses Speechtexter to translate foreign broadcast content","author":"Thomas","date":"May 14, 2023","format":false,"excerpt":"Many thanks to SWLing Post contributor, Patrizio (IN3032SWL), who writes: If you are a fan of foreign radio broadcasts (BCL), you may have experienced the difficulty of transcribing the details of the programs, especially if they are in an unknown language. In addition, many radio stations have their own web\u2026","rel":"","context":"In "How To"","block_context":{"text":"How To","link":"https:\/\/swling.com\/blog\/category\/how-to\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/Speechtexter-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/Speechtexter-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/Speechtexter-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2023\/05\/Speechtexter-1.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":43158,"url":"https:\/\/swling.com\/blog\/2020\/05\/patrizios-simple-homebrew-ncpl-antenna\/","url_meta":{"origin":58339,"position":2},"title":"Patrizio’s simple homebrew NCPL antenna","author":"Thomas","date":"May 7, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Patrizio Cardelli, who writes: I'm Patrizio (SWL I - 5184 \/AN) from Riva del Garda, Italy. A few days ago, I built a Noise-Cancelling Passive Loop (NCPL) antenna. I built the 1:1 balun with a couple of ferrite 175 - 285. I got a\u2026","rel":"","context":"In "Antennas"","block_context":{"text":"Antennas","link":"https:\/\/swling.com\/blog\/category\/antennas\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/Screen-Shot-2020-05-07-at-7.35.59-AM-e1588851426131.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/Screen-Shot-2020-05-07-at-7.35.59-AM-e1588851426131.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/Screen-Shot-2020-05-07-at-7.35.59-AM-e1588851426131.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/05\/Screen-Shot-2020-05-07-at-7.35.59-AM-e1588851426131.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":42243,"url":"https:\/\/swling.com\/blog\/2020\/03\/dean-solves-second-interval-signal-mystery\/","url_meta":{"origin":58339,"position":3},"title":"Dean solves second interval signal mystery","author":"Thomas","date":"March 9, 2020","format":false,"excerpt":"In response to our second mystery interval signal challenge, SWLing Post contributor, Dean Bianco replies: Mystery solved! This is the \u201cinterval signal\u201d (more accurately, a placeholder with a musical station identifier) for the Compa\u00f1\u00eda Telef\u00f3nica Nacional de Espa\u00f1a (CTNW) from Madrid, Spain. They were a point-to-point HF radiotelephone terminal that\u2026","rel":"","context":"In "News"","block_context":{"text":"News","link":"https:\/\/swling.com\/blog\/category\/news\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/03\/Compania-Telefonica-Nacional-de-Espana-642x1024.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/03\/Compania-Telefonica-Nacional-de-Espana-642x1024.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/03\/Compania-Telefonica-Nacional-de-Espana-642x1024.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":42467,"url":"https:\/\/swling.com\/blog\/2020\/03\/cprm-lisboa-another-mystery-signal-solved\/","url_meta":{"origin":58339,"position":4},"title":"CPRM Lisboa: Another mystery signal solved","author":"Thomas","date":"March 24, 2020","format":false,"excerpt":"In response to our latest mystery utility signal challenge, SWLing Post contributor, Dean Bianco replies: This is the musical marker for CPRM Lisboa, a radiotelephone terminal that provided overseas telephone and telegraph communications in the days prior to satellites. I remembered the non-broadcast HF frequencies being loaded to bursting with\u2026","rel":"","context":"In "DX"","block_context":{"text":"DX","link":"https:\/\/swling.com\/blog\/category\/dx\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/Boat-Anchor-Dial-2-1024x678.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/Boat-Anchor-Dial-2-1024x678.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/07\/Boat-Anchor-Dial-2-1024x678.jpg?resize=525%2C300&ssl=1 1.5x"},"classes":[]},{"id":41664,"url":"https:\/\/swling.com\/blog\/2020\/01\/an-app-to-decode-drm\/","url_meta":{"origin":58339,"position":5},"title":"An app to decode DRM?","author":"Thomas","date":"January 18, 2020","format":false,"excerpt":"Many thanks to SWLing Post contributor, Richard Langley, who shares this story by Hans Johnson at Radio World: Can an App Solve the DRM Receiver Problem? (Radio World) The Digital Radio Mondiale standard for digital broadcasting in long, medium, and shortwave bands offers the possibility to transmit audio, text and\u2026","rel":"","context":"In "DRM"","block_context":{"text":"DRM","link":"https:\/\/swling.com\/blog\/category\/drm\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/12\/DRM-Waterfall-Spectrum.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/12\/DRM-Waterfall-Spectrum.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/12\/DRM-Waterfall-Spectrum.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2019\/12\/DRM-Waterfall-Spectrum.jpg?resize=700%2C400&ssl=1 2x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/58339","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/users\/15"}],"replies":[{"embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/comments?post=58339"}],"version-history":[{"count":3,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/58339\/revisions"}],"predecessor-version":[{"id":58346,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/58339\/revisions\/58346"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=58339"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=58339"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=58339"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}