{"id":1392,"date":"2012-02-11T08:11:58","date_gmt":"2012-02-11T16:11:58","guid":{"rendered":"https:\/\/k7nvh.com\/wordpress\/?p=120"},"modified":"2022-03-29T16:30:52","modified_gmt":"2022-03-29T23:30:52","slug":"hx1-aprs-transmitter","status":"publish","type":"post","link":"https:\/\/digitalnigel.com\/wordpress\/?p=1392","title":{"rendered":"HX1 APRS Transmitter"},"content":{"rendered":"<p>I recently purchased a couple of HX1 transmitters for the 144.39 packet frequency from <a href=\"http:\/\/radiometrix.com\">RadioMetrix<\/a>. I&#8217;ve already set up a widget to generate the necessary tones for APRS, so it was a quick matter to connect up the transmitter and the tone generator for a test.<\/p>\n<p>As a reference, here&#8217;s a photo off my oscilloscope displaying the output signal from the tone generator.<\/p>\n<p><a href=\"http:\/\/digitalnigel.com\/wordpress\/wp-content\/uploads\/2012\/02\/IMG_2208.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-medium wp-image-121\" title=\"IMG_2208\" src=\"http:\/\/digitalnigel.com\/wordpress\/wp-content\/uploads\/2012\/02\/IMG_2208-300x224.jpg\" alt=\"\" width=\"300\" height=\"224\" \/><\/a><\/p>\n<p>You can safely ignore the frequency counter. While the tones are switching between 1200hz and 2200hz, it&#8217;s kinda hard to count them. Also, I used a 10x probe, so the peak to peak voltage level listed is 2.25V rather than 0.225V. Lastly, the second division from the bottom is 0V, so as you can see, my tone generator biases the output up a bit to about 2.5V.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>I recently purchased a couple of HX1 transmitters for the 144.39 packet frequency from RadioMetrix. I&#8217;ve already set up a widget to generate the necessary tones for APRS, so it was a quick matter to connect up the transmitter and &hellip; <a href=\"https:\/\/digitalnigel.com\/wordpress\/?p=1392\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13,10],"tags":[],"class_list":["post-1392","post","type-post","status-publish","format-standard","hentry","category-electronics","category-ham-radio"],"_links":{"self":[{"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1392","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1392"}],"version-history":[{"count":1,"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1392\/revisions"}],"predecessor-version":[{"id":3112,"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/1392\/revisions\/3112"}],"wp:attachment":[{"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1392"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1392"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/digitalnigel.com\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1392"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}