{"id":61,"date":"2013-04-21T19:30:57","date_gmt":"2013-04-21T18:30:57","guid":{"rendered":"http:\/\/www.eb3frn.net\/?p=61"},"modified":"2013-04-22T09:37:00","modified_gmt":"2013-04-22T08:37:00","slug":"this-weekend-24ghz","status":"publish","type":"post","link":"https:\/\/www.eb3frn.net\/?p=61","title":{"rendered":"This weekend 24GHz !"},"content":{"rendered":"

In the middle of 2009 I\u00a0 bought a 26GHz transceiver to use in amateur-DSN<\/a>. It was to try to receive the 25GHz downlink of the\u00a0Lunar Reconnaissance<\/a> Orbiter spaceprobe. After much time without succes and after the confirmation of Paul J Marsh<\/a>, that he never has received the probe too I decided give a new life to the module and try to use in 24GHz amateud band.<\/p>\n

\"Thales<\/a>

Thales TGTR-26 trasnceiver<\/p><\/div>\n

The module is a THALES TGTR-26 and googling a bit, looks the some Autralian<\/a> amateurs are using the module without problems. The first was get a suitable local oscillator , this unit should accept a frequency range from the 10 to 14Ghz. The idea is ise a IF of 1.3Ghz then need a LO over 11.45Ghz. Using the cavity and electronics of a Magnum MC PLS22 that accepts 10MHz input reference and the SRD and output filter of a Magnum MC PLX31 that cover from 10.4 to 10.7GHz, I put all totgether and after retuning the SRD I get a nice brick<\/a> of 11.36 GHz, pefect to use as LO.<\/p>\n

\"Magnum<\/a>

Magnum brick oscillator<\/p><\/div>\n

The TGTR-26 uses +5V (1A),-10V and +8V to enable the TX branch. One time solved the power issues, the unit was start to receive very well, giving a conversion gain of 29dB aprox. To test the RX branch I was use the Marconi \/ Aeroflex 6203 microwave test set as signal reference.<\/p>\n

\"RX<\/a>

RX Test setup<\/p><\/div>\n

\"Marconi<\/a>

Marconi 6203 tuned at 24.050GHz -90dBm<\/p><\/div>\n

\"IF<\/a>

IF at at 1.3Ghz, signal at -63dBm<\/p><\/div>\n

After to verify the good results of the RX branch, is the time of the TX branch. To put the transceiver in TX only need aply +8V in the TX pin. The result was amazing, receiving peaks of 32dBm, it can be more than 1.5W! This test has ben used a 10dBm IF at 1.3GHz.<\/p>\n

\"TX<\/a>

TX Setup<\/p><\/div>\n

\"Signal<\/a>

Signal generator as TX IF<\/p><\/div>\n

\"TX<\/a>

TX Signal plot<\/p><\/div>\n

\"TX<\/a>

TX Image signal plot<\/p><\/div>\n

The unit is suitable for amateur use in 24GHz. Really amazing how this modules that can be purchased in ebay and can be recycled to give a new life.<\/p>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

In the middle of 2009 I\u00a0 bought a 26GHz transceiver to use in amateur-DSN. It was to try to receive the 25GHz downlink of the\u00a0Lunar Reconnaissance Orbiter spaceprobe. After much time without succes and after the confirmation of Paul J Marsh, that he never has received the probe too I decided give a new life […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"spay_email":"","jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true},"categories":[1,4],"tags":[],"jetpack_featured_media_url":"","jetpack_publicize_connections":[],"jetpack_shortlink":"https:\/\/wp.me\/p31CYx-Z","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=\/wp\/v2\/posts\/61"}],"collection":[{"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=61"}],"version-history":[{"count":5,"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=\/wp\/v2\/posts\/61\/revisions"}],"predecessor-version":[{"id":72,"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=\/wp\/v2\/posts\/61\/revisions\/72"}],"wp:attachment":[{"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=61"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=61"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.eb3frn.net\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=61"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}