{"id":6019,"date":"2024-01-18T08:53:55","date_gmt":"2024-01-18T03:23:55","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=6019"},"modified":"2024-02-09T19:46:31","modified_gmt":"2024-02-09T14:16:31","slug":"trying-to-decode-recorded-telemetry-of-beliefsat-0-using-sound-modem","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/trying-to-decode-recorded-telemetry-of-beliefsat-0-using-sound-modem\/","title":{"rendered":"Trying to Decode Recorded Telemetry of BeliefSat-0 Using Sound Modem"},"content":{"rendered":"<h2><span style=\"color: #008000;\">Trying to Decode Recorded Telemetry of BeliefSat-0 Using Sound Modem<\/span><\/h2>\n<p>Sound Modem 114 by UZ7HO was suggested to me by VU3TYG as an option to decode telemetry signals from <a href=\"https:\/\/johnsonfrancis.org\/techworld\/beliefsat-0-the-new-amateur-radio-fm-satellite-from-india\/\">BelieftSat-o<\/a>, the new amateur radio FM satellite luanched on 1 January 2024. KJ7LVZ told me that it is possible to use a virtual audio cable like <a href=\"https:\/\/vb-audio.com\/Cable\/\">VB-Audio<\/a> to stream audio from Audacity to Sound Modem. As suggested by him, I loaded the sound file recorded from BeliefSat-0 pass in my region to Audacity and selected VB-Audio Cable as output device. Then I opened Sound Modem and selected VB-Audio Cable as input device. 1700 Hz was kept as decode center frequency.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6021\" src=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Trying-to-Decode-Recorded-Telemetry-of-BeliefSat-0-Using-Sound-Modem.jpg\" alt=\"\" width=\"1210\" height=\"675\" srcset=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Trying-to-Decode-Recorded-Telemetry-of-BeliefSat-0-Using-Sound-Modem.jpg 1210w, https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Trying-to-Decode-Recorded-Telemetry-of-BeliefSat-0-Using-Sound-Modem-300x167.jpg 300w, https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Trying-to-Decode-Recorded-Telemetry-of-BeliefSat-0-Using-Sound-Modem-1024x571.jpg 1024w, https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Trying-to-Decode-Recorded-Telemetry-of-BeliefSat-0-Using-Sound-Modem-768x428.jpg 768w\" sizes=\"auto, (max-width: 1210px) 100vw, 1210px\" \/><\/p>\n<p>While the audio file was playing in Audacity, I could see the waterfall appearing in the lower part of the Sound Modem screen. When the digital signals were being played, some vertical bars appeared in the waterfall. But no decoded message appeared in the blank screen above. I felt as if I have moved one step forward in my attempt to decode the digital telemetry beacon of BeliefSat-0. Obviously something is not right. Either my recordings are not perfect or I have missed some crucial step. At least I am happy that Sound Modem is detecting the digital telemetry signals through the virtual audio cable.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-6024\" src=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Settings-in-Audacity-and-Sound-Modem.jpg\" alt=\"\" width=\"1221\" height=\"675\" srcset=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Settings-in-Audacity-and-Sound-Modem.jpg 1221w, https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Settings-in-Audacity-and-Sound-Modem-300x166.jpg 300w, https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Settings-in-Audacity-and-Sound-Modem-1024x566.jpg 1024w, https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2024\/01\/Settings-in-Audacity-and-Sound-Modem-768x425.jpg 768w\" sizes=\"auto, (max-width: 1221px) 100vw, 1221px\" \/><\/p>\n<p>Here are the screen shots in Preferences: Audio Settings in Audacity, selecting VB-Audio Cable as output device and Settings in Sound Modem, selecting VB-Audio Cable as input device. The default output device in Sound Modem was also VB-Audio Cable. I did not change that. Trying to get help from QRZ forum again. Would appreciate help from anyone who has used this combination of Sound Modem and Audacity for decoding pre-recorded digital telemetry signals.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trying to Decode Recorded Telemetry of BeliefSat-0 Using Sound Modem Sound Modem 114 by UZ7HO was suggested to me by VU3TYG as an option to decode telemetry signals from BelieftSat-o, the new amateur radio FM satellite luanched on 1 January 2024. KJ7LVZ told me that it is possible to use a virtual audio cable like [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":6021,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12,3],"tags":[],"class_list":["post-6019","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amateur-radio-satellites","category-computers"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Trying to Decode Recorded Telemetry of BeliefSat-0 Using Sound Modem - Johnson&#039;s Techworld<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/johnsonfrancis.org\/techworld\/trying-to-decode-recorded-telemetry-of-beliefsat-0-using-sound-modem\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trying to Decode Recorded Telemetry of BeliefSat-0 Using Sound Modem - Johnson&#039;s Techworld\" \/>\n<meta property=\"og:description\" content=\"Trying to Decode Recorded Telemetry of BeliefSat-0 Using Sound Modem Sound Modem 114 by UZ7HO was suggested to me by VU3TYG as an option to decode telemetry signals from BelieftSat-o, the new amateur radio FM satellite luanched on 1 January 2024. 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