{"id":695,"date":"2021-11-03T22:42:33","date_gmt":"2021-11-03T22:42:33","guid":{"rendered":"https:\/\/oshablue.com\/doc\/?p=695"},"modified":"2021-11-03T23:13:34","modified_gmt":"2021-11-03T23:13:34","slug":"gxn-swappable-hivdc-module-external-voltage-control","status":"publish","type":"post","link":"https:\/\/oshablue.com\/doc\/gxn-swappable-hivdc-module-external-voltage-control\/","title":{"rendered":"GXN Swappable HIVDC Module External Voltage Control"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_68 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<p class=\"ez-toc-title\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-69ea5989cdf1b\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-69ea5989cdf1b\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/oshablue.com\/doc\/gxn-swappable-hivdc-module-external-voltage-control\/#Overview\" title=\"Overview\">Overview<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/oshablue.com\/doc\/gxn-swappable-hivdc-module-external-voltage-control\/#Connections_Equipment\" title=\"Connections &amp; Equipment\">Connections &amp; Equipment<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/oshablue.com\/doc\/gxn-swappable-hivdc-module-external-voltage-control\/#Bounding_Parameters_for_the_Operating_Envelope\" title=\"Bounding Parameters for the Operating Envelope\">Bounding Parameters for the Operating Envelope<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/oshablue.com\/doc\/gxn-swappable-hivdc-module-external-voltage-control\/#Photo_and_Diagram\" title=\"Photo and Diagram\">Photo and Diagram<\/a><\/li><\/ul><\/nav><\/div>\n\n<p><meta charset=\"utf-8\">The <a href=\"https:\/\/oshablue.com\/doc\/dl0102g-vs-dl0102gxn\/\">DL0102GXN (&#8220;GXN&#8221;)<\/a> can be configured for external HIVDC (Tx\/pulse voltage) control.  Here are the operating methods and parameters.<\/p>\n\n\n\n<!--more-->\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Overview\"><\/span>Overview<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The <a href=\"https:\/\/oshablue.com\/doc\/dl0102g-vs-dl0102gxn\/\">DL0102GXN (&#8220;GXN&#8221;)<\/a>, and all the (H)DL devices for that matter, can be modified for R&amp;D purposes with a set of IC pin sockets to allow quick swapping of the high-voltage (HIVDC) module for different devices within a series.  The output (HIVDC\/Tx) voltage for a given control voltage depends on the module.<\/p>\n\n\n\n<p>The GXN has the option to use a pin on the board to externally and manually set the control voltage for R&amp;D purposes.<\/p>\n\n\n\n<p>Use a stable, regulated, bench supply to generate the control voltage.  Ideally digital control will probably yield the most repeatable control voltage.  Current is typically &lt; 50 mA.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Connections_Equipment\"><\/span>Connections &amp; Equipment<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The ground for the <strong>bench supply<\/strong> for the control voltage should be tied to the input main GXN power supply (5VDC \/ USB).<\/p>\n\n\n\n<p>The bench supply output positive voltage should be connected to the JP3 single-pin header near the HIVDC supply module.<\/p>\n\n\n\n<p>Use a <strong>DMM<\/strong> capable of measuring up to about -500VDC or more (most do) with some good amount of reliability, and double-check your range setting before operating the GXN with external control voltage.<\/p>\n\n\n\n<p>When probing the board for HIVDC, use <strong>very fine tipped probes<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Bounding_Parameters_for_the_Operating_Envelope\"><\/span>Bounding Parameters for the Operating Envelope<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>For a GXN modified for larger Tx voltages, the output voltage should generally not be set to greater than (more negative than) -400VDC, and probably lower for some situations where XD terminations and cable-XD interactions might send a larger voltage to the crystal (risking crystal damage) or the &#8220;ring-back&#8221; reflection and inductance might create a total peak-to-peak voltage larger than 800V (ideally less).  In some very carefully planned cases, you could probably use near -500VDC.  Greater R&amp;D voltages will require some updates or revisions to the board.<\/p>\n\n\n\n<p>In bench testing here, these control voltages (maximum values) were used for controlling a -500V module:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td>Bench Supply (VDC)<\/td><td>HIVDC Output (VDC)<\/td><td>Condition<\/td><\/tr><tr><td>3.7<\/td><td>-221<\/td><td>Simulate &#8220;stock&#8221; conditions<\/td><\/tr><tr><td>4.7<\/td><td>-285<\/td><td><span style=\"color:#fc0004\" class=\"has-inline-color\">[Conditional Maximum]<\/span> Termination conditions (no-L) where the XD crystal may see voltages greater (more negative) than the Tx voltage itself (see details in presentation elsewhere)<\/td><\/tr><tr><td>6.1<\/td><td>-382<\/td><td><span style=\"color:#ff0004\" class=\"has-inline-color\">[Conditional Maximum]<\/span> Termination conditions (L) where the peak-to-peak voltages at the board connector far exceed the negative Tx voltage itself<\/td><\/tr><\/tbody><\/table><figcaption>Typical and maximum control voltages and corresponding output voltages for a particular -500VDC nominal HIVDC module.<\/figcaption><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Photo_and_Diagram\"><\/span>Photo and Diagram<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<div class=\"wp-block-image\"><figure class=\"aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"495\" src=\"https:\/\/oshablue.com\/doc\/wp-content\/uploads\/2021\/11\/image-1024x495.png\" alt=\"\" class=\"wp-image-697\" srcset=\"https:\/\/oshablue.com\/doc\/wp-content\/uploads\/2021\/11\/image-1024x495.png 1024w, https:\/\/oshablue.com\/doc\/wp-content\/uploads\/2021\/11\/image-300x145.png 300w, https:\/\/oshablue.com\/doc\/wp-content\/uploads\/2021\/11\/image-768x372.png 768w, https:\/\/oshablue.com\/doc\/wp-content\/uploads\/2021\/11\/image.png 1238w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><figcaption>Locations of the connections and probe point(s) for measuring the HIVDC output when adjusting the input control voltage.  The SMA terminal outer \/ barrel points are a good\/reasonable ground reference for these measurements.<\/figcaption><\/figure><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The DL0102GXN (&#8220;GXN&#8221;) can be configured for external HIVDC (Tx\/pulse voltage) control. Here are the operating methods and parameters.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[15,21,9,13,14,12],"tags":[],"class_list":["post-695","post","type-post","status-publish","format-standard","hentry","category-hdlite-family","category-dl0102gxn","category-hardware","category-ndt","category-new-prototypes","category-ultrasonics","entry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/posts\/695","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/comments?post=695"}],"version-history":[{"count":3,"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/posts\/695\/revisions"}],"predecessor-version":[{"id":699,"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/posts\/695\/revisions\/699"}],"wp:attachment":[{"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/media?parent=695"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/categories?post=695"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/oshablue.com\/doc\/wp-json\/wp\/v2\/tags?post=695"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}