{"id":110,"date":"2014-01-08T15:04:09","date_gmt":"2014-01-08T15:04:09","guid":{"rendered":"http:\/\/warc.org.uk\/?page_id=110"},"modified":"2026-02-24T16:48:21","modified_gmt":"2026-02-24T16:48:21","slug":"cdg2000-front-end-board","status":"publish","type":"page","link":"https:\/\/warc.org.uk\/?page_id=110","title":{"rendered":"CDG2000 Front End Board"},"content":{"rendered":"

The CDG2000 Front End Board<\/strong><\/p>\n

This is the first module in the transceiver, and one of the critical ones. It contains the attenuators, switched bandpass filters, H mode mixer, roofing filters and TX\/RX switching. It is controlled by means of an I2C interface, details of which are available from Philips semiconductors.<\/p>\n

Here you can download an early version of the article submitted to RadCom, the PCB artwork, pictures of the performance and supporting material.<\/p>\n

Note that this version of the front end uses a 74AC74 in the mixer to generate the clock.
\n
\n<\/code><\/p>\n

\n\n\n\n\n\n\n
Early version of article<\/a><\/td>\nPicture of_top<\/a><\/td>\nHi res picture of bottom\u00a0<\/a><\/td>\n<\/tr>\n
Performance data<\/a><\/td>\nPCB<\/a><\/td>\nParts List<\/a><\/td>\n<\/tr>\n
Schematic part 1<\/a><\/td>\nSchematic<\/a>
\n part 2<\/a><\/td>\n		Schematic<\/a>
\n part 3<\/a><\/td>\n<\/tr>\n
Schematic<\/a>
\n part 4<\/a><\/td>\n		<\/td>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

PCB CAD Download – Front End<\/a><\/p>\n

Return to CDG2000 Home Page<\/a><\/p>\n<\/div>\n

 <\/p>\n

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

The CDG2000 Front End Board This is the first module in the transceiver, and one of the critical ones. It contains the attenuators, switched bandpass filters, H mode mixer, roofing filters and TX\/RX switching. It is controlled by means of an I2C interface, details of which are available from Philips\u2026<\/p>\n

Continue reading<\/i><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"parent":81,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"templates\/template-page-with-intro.php","meta":{"footnotes":""},"class_list":["post-110","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/110","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=110"}],"version-history":[{"count":22,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/110\/revisions"}],"predecessor-version":[{"id":69703,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/110\/revisions\/69703"}],"up":[{"embeddable":true,"href":"https:\/\/warc.org.uk\/index.php?rest_route=\/wp\/v2\/pages\/81"}],"wp:attachment":[{"href":"https:\/\/warc.org.uk\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=110"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}