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_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},"jetpack_post_was_ever_published":false},"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":7516,"url":"https:\/\/swling.com\/blog\/2013\/10\/shortwave-radio-recordings-the-mighty-kbc-3\/","url_meta":{"origin":16754,"position":4},"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":[]},{"id":5666,"url":"https:\/\/swling.com\/blog\/2013\/02\/shortwave-radio-recordings-the-mighty-kbc\/","url_meta":{"origin":16754,"position":5},"title":"Shortwave Radio Recordings: The Mighty KBC","author":"Thomas","date":"February 17, 2013","format":false,"excerpt":"The Mighty KBC broadcast again early this morning (from 00:00-02:00 UTC) on 9,450 kHz. Their signal was quite strong into North America and there was very little interference of any sort. As we've come to expect, the KBC's Giant Jukebox of music has a lot of rock-n-roll variety, spanning the\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"img":{"alt_text":"tom-petty","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2013\/02\/tom-petty-244x300.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