{"id":29667,"date":"2011-11-27T13:15:04","date_gmt":"2011-11-27T12:15:04","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=29667"},"modified":"2023-09-24T16:11:08","modified_gmt":"2023-09-24T16:11:08","slug":"radio-direction-finder-df2020m-kit","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/new-equipment\/radio-direction-finder-df2020m-kit\/","title":{"rendered":"Radio Direction Finder DF2020M (KIT)"},"content":{"rendered":"

DDF2020M<\/strong> Radio Direction Finder kit requires minimum assembly for 10~15 Minutes<\/p>\n

The DDF2020M DF is an economical but very sophisticated Doppler DF “kit” with a GPS input, and RS232 output to provide the ability to indicate its location and draw bearing automatically or manually on Google Earth map to find the RF transmitter more conveniently.<\/p>\n

DDF2020M<\/strong> kit Includes eight assembled \/ tested PC boards: MAIN board, 2 Sub boards, and 1 antenna board in the main unit. Completion work is required by the user to finish the DF main unit. Guidelines for the completion work are provided.<\/p>\n

The user must provide a NB FM receiver, 5 antennas with mounts for external DF antenna unit and a PC for DF bearing (Windows OS). DDF2020 display program further requires a GPS receiver with NMEA 4800 baud output.<\/span><\/em><\/p>\n

VHF Doppler DF \u2013 5 Antennas primarily for mobile DF, 100~1000 MHz
\nEconomy, high performance DSP \/ micro processor design, software intensive
\nSold as a kit \u2013 Main unit, antenna unit and associated cables
\nRS232 output for Windows PCs (Agrello format)
\nUses modified Joe Moell Wideband Antenna design
\n9 ~ 28 VDC operation
\nOptional GPS Receiver available<\/p>\n

\"\"<\/p>\n

Specifications:<\/strong><\/p>\n

Rcvr Freq: Determined by user-provided FM receiver, range 100 to 1000 MHz
\nAntenna: Four elements for DF and one auxiliary element for improving sensitivity and accuracy, wave vertical with assembled
\nAnt Scan: Scan rate 430 Hz, rotation clockwise (viewed from above antenna)
\nAnt Switch: Modified Joe Moell Wideband Doppler DF antenna design
\nEmploys Agilent HSMP3893 SMT PIN diodes
\nSMT \/ stripline circuit design, SMA output connector
\nAudio Input: FM receiver speaker audio, 1.0K ohm load. 25db dynamic range.
\nGPS Input: 4800 baud RS232 input, NMEA $GPRMC, $GPGGA and \/ or $GPVTG messages.
\nOutput 1: RS232 Agrello DF message, 4800 baud, 8N2. (15 messages \/ second )
\nAnt Outputs : Four discrete active HIGH outputs for DDF 2020 Antenna ( one per antenna )
\nDC Power : 9 ~ 28 VDC
\nVoice Filter : Switched-capacitor filter, (SCF) 4 sections. Bandwidth 0.2 Hz
\nMulti Display<\/p>\n

The MultiDisplay of DDF2020M provides a combined numeric and pelorus display in the main board. A high quality display, with 2 microcomputers and an RS232 input that accepts Agrello DF messages.<\/p>\n

The pelorus display employs 36 high density LEDs, with 4 yellow LEDs at cardinal headings. Option straps allow “hold\/blink” of last valid DF data, or pelorus “orbit” when data goes invalid. All LEDs briefly “flash” (2 second intervals) for enhanced nighttime viewing<\/p>\n

3 digit numeric readout, 0.36 inch characters
\n36 LED pelorus display, 4 yellow cardinal LEDS
\nSelectable HOLD\/ORBIT display for old DF data
\nPower-on self-test<\/p>\n

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

DDF2020M Radio Direction Finder kit requires minimum assembly for 10~15 Minutes The DDF2020M DF is an economical but very sophisticated Doppler DF “kit” with a GPS input, and RS232 output to provide the ability to indicate its location and draw bearing automatically or manually on Google Earth map to find the RF transmitter more conveniently.…<\/p>\n","protected":false},"author":2,"featured_media":29669,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[8],"tags":[259,304],"class_list":["post-29667","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-new-equipment","tag-kit","tag-new-equipment-2","category-8","description-off"],"_links":{"self":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/29667","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/comments?post=29667"}],"version-history":[{"count":0,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/29667\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media\/29669"}],"wp:attachment":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media?parent=29667"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/categories?post=29667"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/tags?post=29667"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}