{"id":104,"date":"2009-03-23T15:38:03","date_gmt":"2009-03-23T15:38:03","guid":{"rendered":"http:\/\/ravtrack.com\/GPStracking\/?p=104"},"modified":"2009-03-23T15:38:35","modified_gmt":"2009-03-23T15:38:35","slug":"m7-heatsinking-and-duty-cycle","status":"publish","type":"post","link":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/","title":{"rendered":"M7 Heatsinking and Duty Cycle"},"content":{"rendered":"

The M7 transceiver has a 5-watt RF power output rating.\u00a0 In a typical application the units is in Standby or Receive mode most of the time.\u00a0 A small fraction of the time, it is transmitting.\u00a0 But when it transmits, the M7 begins heating up, dissapating about 8 watts of heat.\u00a0\u00a0 This depends upon the RF power output setting and the DC input voltage.\u00a0<\/p>\n

The temperature of the\u00a0M7 enclusure must be kept below 60 degrees celcius, (140 farenheit) for proper operation of the unit.\u00a0 For GPS transponder operation, there is no problem doing this, because the duty cycle is low.\u00a0 But, if the M7 is used to send data, and is on the air a lare percentage of the time, then the enclusure’s temperature will begin to rise.\u00a0 The following chart shows the case temperature at 25% and 50% Duty cycle.\u00a0<\/p>\n

\"M7<\/p>\n

\n
\u00a0<\/dt>\n
M7 Duty Cycle<\/dd>\n<\/dl>\n

You can see in the chart, that the M7’s enclosure temperature gets hotter if the DC input voltage is higher, or if the duty cycle is higher.\u00a0\u00a0<\/p>\n

For example, if the DC input voltage is 10V, and the unit is operated at 25% transmit duty cycle, then the\u00a0enclosure temperature would be about 42 degrees C.\u00a0 Given the same duty cycle, the enclosure temperature would be 46 degrees if the DC input were to be 14 volts.\u00a0<\/p>\n

Raveon offers a heatsink option for the M7.\u00a0 The heatsink is large finned heatsink that covers the top of the M7, and is secured on with thermally-conductive epoxy.\u00a0 When this heatsink is attached, the M7 will stay cooler.\u00a0 The following chart illustrates this:<\/p>\n

\u00a0\"m7dutycycle-heatsink\"<\/p>\n

The above data is the\u00a0M7’s\u00a0enslosure temperature\u00a0with a heatsink secured to it.\u00a0 The heatsink covers the top of the enclosure and\u00a0uses normal air convection (no fan).\u00a0 It reduces the case temperature by about 4-8 degrees.\u00a0\u00a0<\/p>\n

If a CPU cooling fan or similar fan were added instead, the case temperature rise would be only a few degrees above ambient.<\/p>\n","protected":false},"excerpt":{"rendered":"

The M7 transceiver has a 5-watt RF power output rating.\u00a0 In a typical application the units is in Standby or Receive mode most of the time.\u00a0 A small fraction of the time, it is transmitting.\u00a0 But when it transmits, the…<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,13],"tags":[],"yoast_head":"\nM7 Heatsinking and Duty Cycle - GPS Tracking - RavTrack Complete Real Time Tracking<\/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:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"M7 Heatsinking and Duty Cycle - GPS Tracking - RavTrack Complete Real Time Tracking\" \/>\n<meta property=\"og:description\" content=\"The M7 transceiver has a 5-watt RF power output rating.\u00a0 In a typical application the units is in Standby or Receive mode most of the time.\u00a0 A small fraction of the time, it is transmitting.\u00a0 But when it transmits, the…\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/\" \/>\n<meta property=\"og:site_name\" content=\"GPS Tracking - RavTrack Complete Real Time Tracking\" \/>\n<meta property=\"article:published_time\" content=\"2009-03-23T15:38:03+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2009-03-23T15:38:35+00:00\" \/>\n<meta property=\"og:image\" content=\"http:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg\" \/>\n<meta name=\"author\" content=\"JS\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"JS\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/\",\"url\":\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/\",\"name\":\"M7 Heatsinking and Duty Cycle - GPS Tracking - RavTrack Complete Real Time Tracking\",\"isPartOf\":{\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#primaryimage\"},\"thumbnailUrl\":\"http:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg\",\"datePublished\":\"2009-03-23T15:38:03+00:00\",\"dateModified\":\"2009-03-23T15:38:35+00:00\",\"author\":{\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/#\/schema\/person\/a5c8be48c037158a55b9d456dd065931\"},\"breadcrumb\":{\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#primaryimage\",\"url\":\"https:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg\",\"contentUrl\":\"https:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg\",\"width\":\"373\",\"height\":\"307\",\"caption\":\"M7 Duty Cycle\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/ravtrack.com\/GPStracking\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"M7 Heatsinking and Duty Cycle\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/#website\",\"url\":\"https:\/\/ravtrack.com\/GPStracking\/\",\"name\":\"GPS Tracking - RavTrack Complete Real Time Tracking\",\"description\":\"GPS Tracking System Blogs Articles News\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/ravtrack.com\/GPStracking\/?s={search_term_string}\"},\"query-input\":\"required name=search_term_string\"}],\"inLanguage\":\"en-US\"},{\"@type\":\"Person\",\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/#\/schema\/person\/a5c8be48c037158a55b9d456dd065931\",\"name\":\"JS\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/ravtrack.com\/GPStracking\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/81e959a1edf11a7ce64aef82d8c9c5e7?s=96&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/81e959a1edf11a7ce64aef82d8c9c5e7?s=96&r=g\",\"caption\":\"JS\"},\"url\":\"https:\/\/ravtrack.com\/GPStracking\/author\/js\/\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"M7 Heatsinking and Duty Cycle - GPS Tracking - RavTrack Complete Real Time Tracking","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/","og_locale":"en_US","og_type":"article","og_title":"M7 Heatsinking and Duty Cycle - GPS Tracking - RavTrack Complete Real Time Tracking","og_description":"The M7 transceiver has a 5-watt RF power output rating.\u00a0 In a typical application the units is in Standby or Receive mode most of the time.\u00a0 A small fraction of the time, it is transmitting.\u00a0 But when it transmits, the…","og_url":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/","og_site_name":"GPS Tracking - RavTrack Complete Real Time Tracking","article_published_time":"2009-03-23T15:38:03+00:00","article_modified_time":"2009-03-23T15:38:35+00:00","og_image":[{"url":"http:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg"}],"author":"JS","twitter_card":"summary_large_image","twitter_misc":{"Written by":"JS","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/","url":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/","name":"M7 Heatsinking and Duty Cycle - GPS Tracking - RavTrack Complete Real Time Tracking","isPartOf":{"@id":"https:\/\/ravtrack.com\/GPStracking\/#website"},"primaryImageOfPage":{"@id":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#primaryimage"},"image":{"@id":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#primaryimage"},"thumbnailUrl":"http:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg","datePublished":"2009-03-23T15:38:03+00:00","dateModified":"2009-03-23T15:38:35+00:00","author":{"@id":"https:\/\/ravtrack.com\/GPStracking\/#\/schema\/person\/a5c8be48c037158a55b9d456dd065931"},"breadcrumb":{"@id":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#primaryimage","url":"https:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg","contentUrl":"https:\/\/ravtrack.com\/GPStracking\/wp-content\/uploads\/2009\/03\/m7dutycycle.jpg","width":"373","height":"307","caption":"M7 Duty Cycle"},{"@type":"BreadcrumbList","@id":"https:\/\/ravtrack.com\/GPStracking\/m7-heatsinking-and-duty-cycle\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/ravtrack.com\/GPStracking\/"},{"@type":"ListItem","position":2,"name":"M7 Heatsinking and Duty Cycle"}]},{"@type":"WebSite","@id":"https:\/\/ravtrack.com\/GPStracking\/#website","url":"https:\/\/ravtrack.com\/GPStracking\/","name":"GPS Tracking - RavTrack Complete Real Time Tracking","description":"GPS Tracking System Blogs Articles News","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/ravtrack.com\/GPStracking\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/ravtrack.com\/GPStracking\/#\/schema\/person\/a5c8be48c037158a55b9d456dd065931","name":"JS","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/ravtrack.com\/GPStracking\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/81e959a1edf11a7ce64aef82d8c9c5e7?s=96&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/81e959a1edf11a7ce64aef82d8c9c5e7?s=96&r=g","caption":"JS"},"url":"https:\/\/ravtrack.com\/GPStracking\/author\/js\/"}]}},"_links":{"self":[{"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/posts\/104"}],"collection":[{"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/comments?post=104"}],"version-history":[{"count":3,"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/posts\/104\/revisions"}],"predecessor-version":[{"id":110,"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/posts\/104\/revisions\/110"}],"wp:attachment":[{"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/media?parent=104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/categories?post=104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ravtrack.com\/GPStracking\/wp-json\/wp\/v2\/tags?post=104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}