{"id":502,"date":"2013-03-04T20:38:43","date_gmt":"2013-03-04T20:38:43","guid":{"rendered":"http:\/\/ava.upuaut.net\/?p=502"},"modified":"2013-08-23T07:26:34","modified_gmt":"2013-08-23T07:26:34","slug":"ublox-max7c","status":"publish","type":"post","link":"https:\/\/ava.upuaut.net\/?p=502","title":{"rendered":"Ublox MAX7C"},"content":{"rendered":"

EDIT2 : These are now in stock and available at HAB Supplies<\/a><\/p>\n

EDIT : The extremely long long times were very odd and I’m not sure something\u00a0environmental\u00a0wasn’t going on. I’ve subsequently tested both modules\u00a0repeatedly\u00a0and from cold inside (in a window) they are getting 3D locks from cold in sub 40 seconds\u00a0consistently.<\/p>\n

Finally the long awaited sample of the new offering from uBlox landed on my desk. The MAX-7C is the latest module from uBlox offering better power usage and performance. Additionally the MAX-7C can run from 1.65v to 3.6v meaning it can be used on both 1.8v and 3.3v boards with no problems. Additionally the UAV\/RC crowd will love the 10Hz updates.<\/p>\n

Downsides ? No more TCXO meaning lock times may be slower. I set up a testing\u00a0environment\u00a0mounting the MAX7 on a breakout with a chip antenna :<\/p>\n

\"max7c\"<\/a><\/p>\n

Along side was a MAX6Q for comparison. Firstly I ran the MAX6Q noting the power usage from 3.3v :<\/p>\n

Aquiring 60mA (Average over 5 mins no lock)
\nTracking 44mA (Average over 20 mins)
\nCyclic \u00a0\u00a0\u00a0 \u00a015mA (Average over 15 mins)<\/p>\n

Its worth noting the GPS did seem to take an extremely long time to lock that evening, normally its nothing like 5 mins.<\/p>\n

Now the MAX7 :<\/p>\n

Aquiring 22mA (Average over 20 mins no lock)
\nTracking 17mA (Average over 10 mins)
\nCyclic\u00a0\u00a0\u00a0 6mA (Average over 10 mins)<\/p>\n

Conclusion : In the very brief test I did the MAX7 did take longer to get a lock than the MAX6, however once it was locked the performance was very similar, I couldn’t tell any difference. However the big difference is the power usage. Reducing the usage in cyclic by over 50% is a massive improvement. I can’t wait to run test one of these on a the PAVA boards.<\/p>\n

Additionally I tested 10Hz mode which seems to be pretty good, however further testing is needed. Once I’m confident with it I’ll have these for sale on http:\/\/ava.upuaut.net\/store<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

EDIT2 : These are now in stock and available at HAB Supplies EDIT : The extremely long long times were very odd and I’m not sure something\u00a0environmental\u00a0wasn’t going on. I’ve subsequently tested both modules\u00a0repeatedly\u00a0and from cold inside (in a window) …<\/p>\n

Read more »<\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-502","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=\/wp\/v2\/posts\/502","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=502"}],"version-history":[{"count":5,"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=\/wp\/v2\/posts\/502\/revisions"}],"predecessor-version":[{"id":593,"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=\/wp\/v2\/posts\/502\/revisions\/593"}],"wp:attachment":[{"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=502"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=502"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ava.upuaut.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=502"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}