{"id":42450,"date":"2015-02-01T00:00:19","date_gmt":"2015-01-31T22:00:19","guid":{"rendered":"http:\/\/www.cqdx.ru\/ham\/?p=42450"},"modified":"2023-10-06T17:47:07","modified_gmt":"2023-10-06T15:47:07","slug":"icom-hf-transceiver-ic-7851","status":"publish","type":"post","link":"https:\/\/www.cqdx.ru\/ham\/new-equipment\/icom-hf-transceiver-ic-7851\/","title":{"rendered":"ICOM HF\/50 MHz Transceiver IC-7851"},"content":{"rendered":"<p><a href=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2015\/01\/4557lrg.jpg\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-42451 \" src=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2015\/01\/4557lrg-1024x393.jpg\" alt=\"4557lrg\" width=\"800\" height=\"307\" srcset=\"https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2015\/01\/4557lrg-1024x393.jpg 1024w, https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2015\/01\/4557lrg-300x115.jpg 300w, https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2015\/01\/4557lrg-768x295.jpg 768w, https:\/\/www.cqdx.ru\/ham\/wp-content\/uploads\/2015\/01\/4557lrg.jpg 1317w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/a><\/p>\n<p style=\"text-align: justify;\">It perfects HF operation with new features such as a 1.2kHz optimized roofing filter to improve in-band adjacent signal performance. The new radio&#8217;s up-conversion design supports a dynamic range that outperforms competitors&#8217; similar models in the 2 to 10 kHz separation tests. Unlike HF rigs that use a conventional voltage controlled oscillator for the 1st LO, the IC-7851 employs a direct digital oscillator (DDS) with a voltage controlled SAW oscillator (VCSO). This new 1st LO design sets a new benchmark for phase noise with -150dBc\/Hz at 10kHz offset (and -140dBc\/Hz at 1kHz offset). Icom&#8217;s IC-7851 also features the spectrum waterfall function found in the manufacturer&#8217;s IC-7700 and IC-7800 upgrade models. The high-resolution waterfall screen shows the changing amplitude of frequencies over time. An enhanced spectrum scope promotes fast and accurate scan and can be operated with PC mouse via USB port. A dual scope function shows simultaneous activity in both bands. This is useful for searching a sub-band while maintaining a run frequency on the main band.<\/p>\n<p style=\"text-align: justify;\">Features:<\/p>\n<ul>\n<li style=\"text-align: justify;\">Four 32-bit Floating Point DSP<\/li>\n<li>+40 dBm ultra high Intercept Point<\/li>\n<li>Automatic Tracking Preselector<\/li>\n<li>Two Independent Receiver Circuits<\/li>\n<li>200 Watts Output<\/li>\n<li>Ultra High Frequency Stability OCXO<\/li>\n<li>7 Inch Wide Color TFT LCD<\/li>\n<li>Multi-Function Spectrum Scope<\/li>\n<li>RTTY\/PSK31 Operation without PC<\/li>\n<li>Antenna Control<\/li>\n<li>Multiple Scan Formats<\/li>\n<li>Screen Management<\/li>\n<li>Manual Digital IF Notch Filter<\/li>\n<li>Professional 6 Meter Receiver<\/li>\n<li>Digital Voice Recorder<\/li>\n<li>Compact Flash Memory Slot<\/li>\n<li>Voice Synthesizer<\/li>\n<li>CW Audio Peak Filter<\/li>\n<li>High Speed Automatic Antenna Tuner<\/li>\n<li>Main\/Sub Receiver Connections<\/li>\n<li>RS-232 Port<\/li>\n<li>Ethernet Port<\/li>\n<li>Dual Passband Tuning<\/li>\n<li>Configurable AGC<\/li>\n<\/ul>\n<p>Price: &gt;10K USD<\/p>\n<p><a href=\"http:\/\/www.icomamerica.com\/en\/\" target=\"_blank\" rel=\"noopener\">Link<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>It perfects HF operation with new features such as a 1.2kHz optimized roofing filter to improve in-band adjacent signal performance. The new radio&#8217;s up-conversion design supports a dynamic range that outperforms competitors&#8217; similar models in the 2 to 10 kHz separation tests. Unlike HF rigs that use a conventional voltage controlled oscillator for the 1st&hellip;<\/p>\n","protected":false},"author":2,"featured_media":42451,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_links_to":"","_links_to_target":""},"categories":[8],"tags":[230,304],"class_list":["post-42450","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-new-equipment","tag-icom","tag-new-equipment-2","category-8","description-off"],"_links":{"self":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/42450","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=42450"}],"version-history":[{"count":0,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/posts\/42450\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media\/42451"}],"wp:attachment":[{"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/media?parent=42450"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/categories?post=42450"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.cqdx.ru\/ham\/wp-json\/wp\/v2\/tags?post=42450"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}