{"id":872,"date":"2019-08-29T21:21:40","date_gmt":"2019-08-29T19:21:40","guid":{"rendered":"http:\/\/alloza.eu\/david\/WordPress3\/?p=872"},"modified":"2019-08-29T21:56:01","modified_gmt":"2019-08-29T19:56:01","slug":"upgrade-of-the-scalar-network-analyzer-d6-by-manoes","status":"publish","type":"post","link":"https:\/\/alloza.eu\/david\/WordPress3\/?p=872","title":{"rendered":"Upgrade of the scalar network analyzer \u00ab\u00a0D6\u00a0\u00bb, by Manoes"},"content":{"rendered":"\n

<\/p>\n\n\n\n

Manoes, a reader of this blog, have send to me a description of a set of modifications for the \u00ab\u00a0D6\u00a0\u00bb analyzer (My words remains in italics<\/em>).<\/p>\n\n\n\n

Mod\u2019s I made.<\/h2>\n\n\n\n

I did put a lot of C\u2019s 100pf on existing and newly made places on the powerline traces.
I also did try one on the input C it did not have effect that I expected but\u2026\u2026 my measurement could be false, maybe someone can do it again.
Upside<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n

Upside of the board;  maybe I forgot some C’s to mention but better one to much then one  forgotten<\/p>\n\n\n

\"\"<\/a><\/figure>\n\n\n\n

Underside of the board a lot of them, the places are experimental found\u2026..
\nJust try and error with a non-conductive plier!!
\nAlso I made some new screening on the upside and underside of the board.
\nI did change the SMA connectors for a wider type witch has nuts on the outside.
\nBefore I put the whole board inside the cabinet I glued some conductive foam on the board it did give a bit better result.
\nAll the measurements are made with input and output closed with 50 Ohm the last picture is input and output connected with a short SMA cable.<\/p>\n\n\n\n

\"\"<\/a>
New screening under <\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

\"\"<\/a>
Changed screening upside and new SMA connectors <\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

\"\"<\/a>
Changed connectors <\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
\"\"<\/a>
Yellow before mod\u2019s, green after mods without casing and no foam. <\/figcaption><\/figure>\n\n\n\n
\"\"
Yellow before mod\u2019s, green after mod\u2019s board inside casing, new SMA and conductive foam. <\/figcaption><\/figure>\n\n\n\n
\"\"
Trace in\/ out connected with mod\u2019s : -3 dB input and -6 dB output and changed 120 kHz. Filter <\/figcaption><\/figure>\n\n\n\n

All the measurements are made with the above mods. Terrible enough my spectrumanalyser is broken during the measurements so I can not produce better pictures as above ones. I do hope to repair the old boy when I have the time to live and fun to do it. (High tension unit defect, transformer into smoke so I have to made a new one by hand .
Software VMA of our friend Vitor Martins Augusto<\/a>.
Grtz, Manoes<\/p>\n\n\n\n

For several months i don’t understand why the frequency response curve of this analyzer deteriorated when we exceeded 3GHz. By drastically reducing this problem Manoes give me an answer.
I will add an option on SNASharp to be able to trace the frequency response of an analyzer by disabling the calibration, this can help to understand how a hardware modification work.<\/em>
David.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

Manoes, a reader of this blog, have send to me a description of a set of modifications for the \u00ab\u00a0D6\u00a0\u00bb analyzer (My words remains in italics). Mod\u2019s I made. I did put a lot of C\u2019s 100pf on existing and … Continuer la lecture →<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[91,18,88,90,17,1],"tags":[78,82,80],"class_list":["post-872","post","type-post","status-publish","format-standard","hentry","category-d6","category-elec","category-mesure","category-sna","category-tech","category-uncategorized","tag-d6","tag-scalar-analyzer","tag-sna"],"_links":{"self":[{"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts\/872","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=872"}],"version-history":[{"count":11,"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts\/872\/revisions"}],"predecessor-version":[{"id":897,"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=\/wp\/v2\/posts\/872\/revisions\/897"}],"wp:attachment":[{"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/alloza.eu\/david\/WordPress3\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}