{"id":53481,"date":"2022-07-17T07:30:28","date_gmt":"2022-07-17T11:30:28","guid":{"rendered":"https:\/\/swling.com\/blog\/?p=53481"},"modified":"2022-07-17T07:30:28","modified_gmt":"2022-07-17T11:30:28","slug":"radio-waves-drm-demo-in-australia-decoding-the-jwst-the-ardc-and-ev-makers-dropping-am-radio","status":"publish","type":"post","link":"https:\/\/swling.com\/blog\/2022\/07\/radio-waves-drm-demo-in-australia-decoding-the-jwst-the-ardc-and-ev-makers-dropping-am-radio\/","title":{"rendered":"Radio Waves: DRM Demo in Australia, Decoding the JWST, the ARDC, and EV Makers Dropping AM Radio"},"content":{"rendered":"

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

Radio Waves:\u00a0 Stories Making Waves in the World of Radio<\/h2>\n

Welcome to the\u00a0SWLing Post\u2019s<\/em> Radio Waves<\/em>, a collection of links to interesting stories making waves in the world of radio.\u00a0<\/strong>Enjoy!<\/strong><\/p>\n

\n

Australia Demonstrates DRM on AM, FM (Radio World)<\/a><\/h2>\n

Since September 2020, ABC Radio has been quietly trialing DRM technology in Victoria<\/p>\n

The public-service Australian Broadcasting Corp. and its transmission contractor BAI Communications Transmission Network hosted a public demonstration of Digital Radio Mondiale broadcasts on June 29, 2022. ABC highlighted the use of DRM on both AM and FM in Wagaratta, Victoria.<\/p>\n

According to the DRM Consortium, the demonstration was the culmination of almost two years of COVID-impacted work to assess the performance of DRM services in Australia\u2019s VHF and medium-wave bands.<\/p>\n

Previously, the Australian Amateur Radio Experimenters Group reported that AREG member Steve Adler (VK5SFA) had been monitoring \u201ca very un-publicized Digital Radio Mondiale (DRM) trial\u201d on 747 kHz from Wangaratta in August 2021.<\/p>\n

The Australian Communications and Media Authority provided ABC with a license variation to conduct the DRM 30 trials from September 1, 2020, to August 31, 2022.<\/p>\n

At the public demonstration, senior representatives from the public, commercial and community radio sectors, along with regulators and other interested parties, were able to hear and see the capabilities of DRM broadcasting on AM from Dockers Plains and on FM from Mount Baranduda. They were also able to review the transmission equipment at Wagaratta.[Continue reading…<\/a>]<\/p>\n

Also check out the DRM Consortium’s article<\/a> on this same topic.<\/p>\n

Decoding James Webb Space Telescope (Daniel Est\u00e9vez)<\/a><\/h2>\n

The James Webb Space Telescope probably needs no introduction, since it is perhaps the most important and well-known mission of the last years. It was launched on Christmas day from Kourou, French Guiana, into a direct transfer orbit to the Sun-Earth L2 Lagrange point. JWST uses S-band at 2270.5 MHz to transmit telemetry. The science data will be transmitted in K-band at 25.9 GHz, with a rate of up to 28 Mbps.<\/p>\n

After launch, the first groundstation to pick the S-band signal from JWST was the 10 m antenna from the Italian Space Agency in Malindi, Kenya. This groundstation commanded the telemetry rate to increase from 1 kbps to 4 kbps. After this, the spacecraft\u2019s footprint continued moving to the east, and it was tracked for a few hours by the DSN in Canberra. One of the things that Canberra did was to increase the telemetry rate to 40 kbps, which apparently is the maximum to be used in the mission.<\/p>\n

As JWST moved away from Earth, its footprint started moving west. After Canberra, the spacecraft was tracked by Madrid. Edgar Kaiser DF2MZ, Iban Cardona EB3FRN and other amateur observers in Europe received the S-band telemetry signal. When Iban started receiving the signal, it was again using 4 kbps, but some time after, Madrid switched it to 40 kbps.<\/p>\n

At 00:50 UTC on December 26, the spacecraft made its first correction burn, which lasted an impressive 65 minutes. Edgar caught this manoeuvre in the Doppler track.<\/p>\n

Later on, between 7:30 and 11:30 UTC, I have been receiving the signal with one of the 6.1 metre dishes at Allen Telescope Array. The telemetry rate was 40 kbps and the spacecraft was presumably in lock with Goldstone, though it didn\u2019t appear in DSN now. I will publish the recording in Zenodo as usual, but since the files are rather large I will probably reduce the sample rate, so publishing the files will take some time.<\/p>\n

In the rest of this post I give a description of the telemetry of JWST and do a first look at the telemetry data. [Continue reading…<\/a>]<\/p>\n

Helping Secure Amateur Radio’s Digital Future (Hackaday)<\/a><\/h2>\n

The average person\u2019s perception of a ham radio operator, assuming they even know what that means, is more than likely some graybeard huddled over the knobs of a war-surplus transmitter in the wee small hours of the morning. It\u2019s a mental image that, admittedly, isn\u2019t entirely off the mark in some cases. But it\u2019s also a gross over-simplification, and a generalization that isn\u2019t doing the hobby any favors when it comes to bringing in new blood.<\/p>\n

In reality, a modern ham\u2019s toolkit includes a wide array of technologies that are about as far away from your grandfather\u2019s kit-built rig as could be \u2014 and there\u2019s exciting new protocols and tools on the horizon. To ensure a bright future for amateur radio, these technologies need to be nurtured the word needs to be spread about what they can do. Along the way, we\u2019ll also need to push back against stereotypes that can hinder younger operators from signing on.<\/p>\n

On the forefront of these efforts is Amateur Radio Digital Communications (ARDC), a private foundation dedicated to supporting amateur radio and digital communication by providing grants to scholarships, educational programs, and promising open source technical projects. For this week\u2019s Hack Chat, ARDC Executive Director Rosy Schechter (KJ7RYV) and Staff Lead John Hays (K7VE) dropped by to talk about the future of radio and digital communications. [Continue reading…<\/a>]<\/p>\n

Interference causes EV makers to drop AM radio (Radio World via the Southgate ARC)<\/a><\/h2>\n

Radio World reports the Electromagnetic Interference generated by Electric Vehicles is causing some EV automakers to drop AM (medium wave) radio<\/p>\n

The article says:<\/p>\n

Some EV automakers are dropping AM altogether due to audio quality concerns, but that\u2019s just one piece of the puzzle as radio continues to fight for space on the dash.<\/p>\n

\u201cAs carmakers increase electric vehicle offerings throughout their lineups, the availability of AM radio to consumers is declining,\u201d said Pooja Nair, communications systems engineer with Xperi Corp., in a Radio World guest commentary. \u201cThis is because the effects of electromagnetic interference are more pronounced in EVs than in vehicles with internal-combustion engines.\u201d<\/p>\n

In other words, electromagnetic frequencies generated by EV motors occupy the same wavelength as AM radio signals. The competing signals clash, effectively cancelling each other out. As EV motors grow more powerful, AM static tends to increase.<\/p>\n

Read the full story at
\nhttps:\/\/www.radioworld.com\/news-and-business\/headlines\/why-are-some-automakers-ditching-am-radio<\/a><\/p>\n

\n

Do you enjoy the SWLing Post?<\/strong><\/span><\/h1>\n

Please consider supporting us via\u00a0Patreon<\/span><\/a>\u00a0or our\u00a0Coffee<\/span>\u00a0Fund<\/span><\/a>! <\/em><\/strong><\/p>\n

Your support makes articles like this one possible. Thank you!<\/em><\/p>\n

\"\"<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Radio Waves:\u00a0 Stories Making Waves in the World of Radio Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a collection of links to interesting stories making waves in the world of radio.\u00a0Enjoy! Australia Demonstrates DRM on AM, FM (Radio World) Since September 2020, ABC Radio has been quietly trialing DRM technology in Victoria The public-service Australian Broadcasting […]<\/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":[373,8,54,545,433,43],"tags":[625,980,4083,3354,4102,9898,4099,1672,8259,634],"class_list":["post-53481","post","type-post","status-publish","format-standard","hentry","category-am","category-articles","category-drm","category-ham-radio","category-mediumwave","category-shortwave-radio","tag-am-radio","tag-digital-radio-mondiale","tag-drm","tag-hackaday","tag-ham-radio","tag-jwst","tag-mediumwave","tag-nasa","tag-radio-waves","tag-radio-world"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_shortlink":"https:\/\/wp.me\/pn3uc-dUB","jetpack-related-posts":[{"id":57373,"url":"https:\/\/swling.com\/blog\/2023\/08\/radio-waves-drm-from-ascension-to-brazil-commercial-radio-boost-fm-hd-power-and-new-pakistan-drm-project\/","url_meta":{"origin":53481,"position":0},"title":"Radio Waves: DRM from Ascension to Brazil, Commercial Radio Boost, FM HD Power, and New Pakistan DRM Project,","author":"Thomas","date":"August 5, 2023","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a collection of links to interesting stories making waves in the world of radio.\u00a0Enjoy! Many thanks to SWLing Post contributors Dennis Dura and Mangosman for the following tips: Swiss Private Radio Station Broadcasts DRM\u2026","rel":"","context":"In "Broadcasters"","block_context":{"text":"Broadcasters","link":"https:\/\/swling.com\/blog\/category\/broadcasters\/"},"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":[]},{"id":48555,"url":"https:\/\/swling.com\/blog\/2021\/04\/radio-waves-dirty-transmitters-world-amateur-radio-day-electronic-echoes-drm-via-android-and-10-more-bbc-am-services-close\/","url_meta":{"origin":53481,"position":1},"title":"Radio Waves: Dirty Transmitters, World Amateur Radio Day, Electronic Echoes, DRM via Android, and 10 More BBC AM Services Close","author":"Thomas","date":"April 17, 2021","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest\u00a0SWLing Post\u00a0readers.\u00a0 To that end:\u00a0Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a\u2026","rel":"","context":"In "AM"","block_context":{"text":"AM","link":"https:\/\/swling.com\/blog\/category\/am\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/10\/WHKY-AM-Towers-Transmitter-Site.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/10\/WHKY-AM-Towers-Transmitter-Site.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/10\/WHKY-AM-Towers-Transmitter-Site.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/10\/WHKY-AM-Towers-Transmitter-Site.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/10\/WHKY-AM-Towers-Transmitter-Site.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":48265,"url":"https:\/\/swling.com\/blog\/2021\/03\/radio-waves-friedrichshafen-cancelled-coast-guard-seeks-rare-diode-kindred-spirits-in-dxing-and-drm-pitch-for-indias-fm-band\/","url_meta":{"origin":53481,"position":2},"title":"Radio Waves: Friedrichshafen Cancelled, Coast Guard Seeks Rare Diode, Kindred Spirits in DXing, and DRM Pitch for India’s FM Band","author":"Thomas","date":"March 26, 2021","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest\u00a0SWLing Post\u00a0readers.\u00a0 To that end:\u00a0Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a\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\/2018\/06\/Ham-Radio-Friedrichshafen-2018-25-of-46.jpg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/06\/Ham-Radio-Friedrichshafen-2018-25-of-46.jpg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/06\/Ham-Radio-Friedrichshafen-2018-25-of-46.jpg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/06\/Ham-Radio-Friedrichshafen-2018-25-of-46.jpg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2018\/06\/Ham-Radio-Friedrichshafen-2018-25-of-46.jpg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":57774,"url":"https:\/\/swling.com\/blog\/2023\/09\/radio-waves-drm-edition-gospell-drm-pocket-radio-indonesia-chooses-drm-standard\/","url_meta":{"origin":53481,"position":3},"title":"Radio Waves (DRM Edition): Gospell DRM Pocket Radio & Indonesia chooses DRM standard","author":"Thomas","date":"September 19, 2023","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a collection of links to interesting stories making waves in the world of radio.\u00a0Enjoy! Many thanks to SWLing Post contributors Mangosman, Benn Kobb, and Mark Fahey for the following tips: CML Micro release the\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\/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":[]},{"id":61996,"url":"https:\/\/swling.com\/blog\/2025\/02\/radio-waves-new-ssb-swl-contest-drm-functionality-recommendations-and-word-dab-summit-2024\/","url_meta":{"origin":53481,"position":4},"title":"Radio Waves: New SSB SWL Contest, DRM Functionality Recommendations, and Word DAB Summit 2024","author":"Thomas","date":"February 8, 2025","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a collection of links to interesting stories making waves in the world of radio.\u00a0Enjoy! Many thanks to SWLing Post contributors David Iurescia, Alan, and Frank (SWL F14368) for the following tips: SSB DXCC SWL\u2026","rel":"","context":"In "Contests"","block_context":{"text":"Contests","link":"https:\/\/swling.com\/blog\/category\/contests\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Icom-IC-756-Pro-LRA36.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Icom-IC-756-Pro-LRA36.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Icom-IC-756-Pro-LRA36.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Icom-IC-756-Pro-LRA36.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/09\/Icom-IC-756-Pro-LRA36.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]},{"id":48630,"url":"https:\/\/swling.com\/blog\/2021\/04\/radio-waves-josh-reviews-the-belka-dx-sinclair-fraunhofer-drm-partnership-clear-net-frequencies-requested-and\/","url_meta":{"origin":53481,"position":5},"title":"Radio Waves: Josh reviews the Belka-DX, Sinclair Fraunhofer DRM Partnership, Clear Net Frequencies Requested, and","author":"Thomas","date":"April 23, 2021","format":false,"excerpt":"Radio Waves:\u00a0 Stories Making Waves in the World of Radio Because I keep my ear to the waves, as well as receive many tips from others who do the same, I find myself privy to radio-related stories that might interest\u00a0SWLing Post\u00a0readers.\u00a0 To that end:\u00a0Welcome to the\u00a0SWLing Post\u2019s Radio Waves, a\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\/2020\/12\/Belka-DX-SC-Coast-Dockside-DX-2.jpeg?resize=350%2C200&ssl=1","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/12\/Belka-DX-SC-Coast-Dockside-DX-2.jpeg?resize=350%2C200&ssl=1 1x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/12\/Belka-DX-SC-Coast-Dockside-DX-2.jpeg?resize=525%2C300&ssl=1 1.5x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/12\/Belka-DX-SC-Coast-Dockside-DX-2.jpeg?resize=700%2C400&ssl=1 2x, https:\/\/i0.wp.com\/swling.com\/blog\/wp-content\/uploads\/2020\/12\/Belka-DX-SC-Coast-Dockside-DX-2.jpeg?resize=1050%2C600&ssl=1 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/53481","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=53481"}],"version-history":[{"count":0,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/posts\/53481\/revisions"}],"wp:attachment":[{"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/media?parent=53481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/categories?post=53481"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/swling.com\/blog\/wp-json\/wp\/v2\/tags?post=53481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}