{"id":16792,"date":"2026-04-03T15:37:22","date_gmt":"2026-04-03T10:07:22","guid":{"rendered":"https:\/\/johnsonfrancis.org\/techworld\/?p=16792"},"modified":"2026-04-03T15:37:23","modified_gmt":"2026-04-03T10:07:23","slug":"testing-spectral-spread-of-ssb-output-from-easy-bitx","status":"publish","type":"post","link":"https:\/\/johnsonfrancis.org\/techworld\/testing-spectral-spread-of-ssb-output-from-easy-bitx\/","title":{"rendered":"Testing Spectral Spread of SSB output from Easy BITX"},"content":{"rendered":"<iframe loading=\"lazy\" width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/136EENLFcBw?si=lVEigE7MBNc6FdEd\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n\n<p class=\"wp-block-paragraph\">Used my FT-710 radio to check the transmitted signal and spectral spread of my homebrew Easy BITX SSB signal. 18 dB attenuator was used in FT-710 to reduce front end overload. Initial test was with the spectrum scope in the usual waterfall mode with the screen displaying the whole 7 MHz band. It showed the dense SSB band with 9+10 dB signal because of proximity of two antennas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This was with the marker at the centre frequency. You can see the calibration error as most of the SSB signals are about 300 Hz below the marker. Dense part of the signal has a spread less than 2kHz LSB below 7050 kHz, the central frequency. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\"> <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Used my FT-710 radio to check the transmitted signal and spectral spread of my homebrew Easy BITX SSB signal. 18 dB attenuator was used in FT-710 to reduce front end overload. Initial test was with the spectrum scope in the usual waterfall mode with the screen displaying the whole 7 MHz band. It showed the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":16793,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-16792","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-amateur-radio-ham-radio"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Testing Spectral Spread of SSB output from Easy BITX - 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\/testing-spectral-spread-of-ssb-output-from-easy-bitx\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Testing Spectral Spread of SSB output from Easy BITX - Johnson&#039;s Techworld\" \/>\n<meta property=\"og:description\" content=\"Used my FT-710 radio to check the transmitted signal and spectral spread of my homebrew Easy BITX SSB signal. 18 dB attenuator was used in FT-710 to reduce front end overload. Initial test was with the spectrum scope in the usual waterfall mode with the screen displaying the whole 7 MHz band. It showed the [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/johnsonfrancis.org\/techworld\/testing-spectral-spread-of-ssb-output-from-easy-bitx\/\" \/>\n<meta property=\"og:site_name\" content=\"Johnson&#039;s Techworld\" \/>\n<meta property=\"article:published_time\" content=\"2026-04-03T10:07:22+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-03T10:07:23+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/johnsonfrancis.org\/techworld\/wp-content\/uploads\/2026\/04\/Testing-Spectral-Spread-of-SSB-Output-from-Easy-BITX.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"677\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Johnson Francis\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Johnson Francis\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/testing-spectral-spread-of-ssb-output-from-easy-bitx\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/testing-spectral-spread-of-ssb-output-from-easy-bitx\\\/\"},\"author\":{\"name\":\"Johnson Francis\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"headline\":\"Testing Spectral Spread of SSB output from Easy BITX\",\"datePublished\":\"2026-04-03T10:07:22+00:00\",\"dateModified\":\"2026-04-03T10:07:23+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/testing-spectral-spread-of-ssb-output-from-easy-bitx\\\/\"},\"wordCount\":118,\"publisher\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/#\\\/schema\\\/person\\\/6201c843e80ccd3578e6196b1d007027\"},\"image\":{\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/testing-spectral-spread-of-ssb-output-from-easy-bitx\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/wp-content\\\/uploads\\\/2026\\\/04\\\/Testing-Spectral-Spread-of-SSB-Output-from-Easy-BITX.jpg\",\"articleSection\":[\"Amateur Radio (Ham Radio)\"],\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/testing-spectral-spread-of-ssb-output-from-easy-bitx\\\/\",\"url\":\"https:\\\/\\\/johnsonfrancis.org\\\/techworld\\\/testing-spectral-spread-of-ssb-output-from-easy-bitx\\\/\",\"name\":\"Testing Spectral Spread of SSB output from Easy BITX - 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