http:\/\/www.sigidwiki.com\/wiki\/Signal_Identification_Guide<\/a><\/p>\nCurious if any readers have been using this guide–seems like a convenient\u00a0resource to ID\u00a0those numerous signals on the bands. Entries show what each signal looks like on a spectrum waterfall display and provides audio clips.<\/p>\n
Thanks for the tip, Bill!<\/p>\n","protected":false},"excerpt":{"rendered":"
Many thanks to SWLing Post reader, Bill, who shares a link to this Signal Identification Guide: http:\/\/www.sigidwiki.com\/wiki\/Signal_Identification_Guide Curious if any readers have been using this guide–seems like a convenient\u00a0resource to ID\u00a0those numerous signals on the bands. Entries show what each signal looks like on a spectrum waterfall display and provides audio clips. Thanks for the […]<\/p>\n","protected":false},"author":15,"featured_media":0,"comment_status":"open","ping_status":"open","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":[1114,3,43],"tags":[4114,4082,4674],"class_list":["post-16754","post","type-post","status-publish","format-standard","hentry","category-digital-modes","category-news","category-shortwave-radio","tag-digital-modes","tag-shortwave-radio","tag-signal-identification-guide"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-4me","jetpack-related-posts":[{"id":22846,"url":"https:\/\/swling.com\/blog\/2016\/12\/digifaq-updated-an-hf-digital-decoding-primer-and-reference-tool\/","url_meta":{"origin":16754,"position":0},"title":"DigiFAQ Updated: An HF Digital Decoding primer and reference tool","author":"Thomas","date":"December 18, 2016","format":false,"excerpt":"Many thanks to SWLing Post contributor,\u00a0Mike Agner, who writes: [S]ome 20 years ago, Mike Chace-Ortiz, Stan Skalsky, myself and a bunch of other folks put together a FAQ about digital modes on radio - specifically modes going from LW way up into the UHF spectrum- called the DigiFAQ 5.3. I\u2026","rel":"","context":"In "Digital Modes"","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Digital-Modes-1024x486.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Digital-Modes-1024x486.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/12\/Spectrum-Digital-Modes-1024x486.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":64980,"url":"https:\/\/swling.com\/blog\/2025\/12\/bobs-radio-corner-industrial-scientific-and-medical-ism-bands\/","url_meta":{"origin":16754,"position":1},"title":"Bob’s Radio Corner: Industrial, Scientific, and Medical (ISM) Bands","author":"Thomas","date":"December 21, 2025","format":false,"excerpt":"Industrial, Scientific, and Medical (ISM) Bands Noted by Bob Colegrove This is not the sort of thing you might consider typical DX.\u00a0 One reporter traced a signal like the one I describe here to the innocuous utility box at the corner of his lot.\u00a0 No, it is not noise.\u00a0 It\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\/2025\/12\/Fig-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=1050%2C600&ssl=1 3x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2025\/12\/Fig-1.jpeg?resize=1400%2C800&ssl=1 4x"},"classes":[]},{"id":221,"url":"https:\/\/swling.com\/blog\/2011\/07\/between-broadcasts-exploring-interval-signals\/","url_meta":{"origin":16754,"position":2},"title":"Between Broadcasts-Exploring Interval Signals","author":"Thomas","date":"July 7, 2011","format":false,"excerpt":"Lately, I've been listening to a plethora of shortwave broadcasts as I'm about to review several new radios. I've noted so many great interval signals that are still in use.\u00a0The following is a reprise of a previous post--from over two years ago--about interval signals. If you've never heard of interval\u2026","rel":"","context":"In "Articles"","block_context":{"text":"Articles","link":"https:\/\/swling.com\/blog\/category\/articles\/"},"img":{"alt_text":"Analog Radio Dial","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/\/2009\/05\/swdial.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":65280,"url":"https:\/\/swling.com\/blog\/2026\/02\/part-one-a-beginners-guide-to-ale\/","url_meta":{"origin":16754,"position":3},"title":"Part One: A Beginner\u2019s Guide to ALE","author":"Thomas","date":"February 8, 2026","format":false,"excerpt":"Many thanks to SWLing Post contributor\u00a0Don Moore\u2013noted\u00a0author, traveler, and DXer\u2013who shares the following post: A Beginner\u2019s Guide to ALE:\u00a0Part One By Don Moore Don\u2019s traveling DX stories can be found in his book Tales of a Vagabond DXer [SWLing Post affiliate link]. If you\u2019ve already read his book and enjoyed\u2026","rel":"","context":"In "Digital Modes"","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2026\/02\/Header-ALE-1.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2026\/02\/Header-ALE-1.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2026\/02\/Header-ALE-1.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2026\/02\/Header-ALE-1.jpeg?resize=700%2C400&ssl=1 2x"},"classes":[]},{"id":21241,"url":"https:\/\/swling.com\/blog\/2016\/09\/can-you-help-rick-id-this-mystery-digital-signal\/","url_meta":{"origin":16754,"position":4},"title":"Can you help Rick ID this mystery digital signal?","author":"Thomas","date":"September 7, 2016","format":false,"excerpt":"Many thanks to SWLing Post reader,\u00a0Rick Slobodian, who writes to request help with the following: I was on the beach at our lake, [where I was listening to my] Tecsun PL-606 receiver. [On Friday, August 19, 2016 at 1800 UTC, I noted a] \"beeper\": beeps at Hz repetition rate ,\u2026","rel":"","context":"In "Digital Modes"","block_context":{"text":"Digital Modes","link":"https:\/\/swling.com\/blog\/category\/digital-modes\/"},"img":{"alt_text":"Ricks-Location","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/09\/Ricks-Location.jpg?resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/09\/Ricks-Location.jpg?resize=350%2C200 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2016\/09\/Ricks-Location.jpg?resize=525%2C300 1.5x"},"classes":[]},{"id":7516,"url":"https:\/\/swling.com\/blog\/2013\/10\/shortwave-radio-recordings-the-mighty-kbc-3\/","url_meta":{"origin":16754,"position":5},"title":"Shortwave Radio Recordings: The Mighty KBC","author":"Thomas","date":"October 7, 2013","format":false,"excerpt":"Sunday at 00:00-02:00 UTC, I tuned to 7,375 kHz to listen to The Mighty KBC. This was the first time I tuned to their winter frequency this season and wasn't sure how strong their signal would be on a relatively noisy night on the bands. KBC's signal was blowtorch strength\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"\"Dad, that's The Mighty KBC! Turn it up!\"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2013\/02\/RadioListeningFamily-300x221.jpg?resize=350%2C200","width":350,"height":200},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/16754","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=16754"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/16754\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=16754"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=16754"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=16754"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
![\"31meterband-waterfall\"](\"http:\/\/swling.com\/blog\/wp-content\/uploads\/2015\/10\/31meterband-waterfall.jpg\")
<\/p>\n