{"id":5230,"date":"2022-03-26T15:21:00","date_gmt":"2022-03-26T04:21:00","guid":{"rendered":"https:\/\/www.homebrewradio.us\/blog\/2022\/03\/26\/getting-more-rigorous-about-receiver-design-video\/"},"modified":"2025-07-22T18:03:58","modified_gmt":"2025-07-22T08:03:58","slug":"getting-more-rigorous-about-receiver-design-video","status":"publish","type":"post","link":"https:\/\/www.homebrewradio.us\/blog\/2022\/03\/26\/getting-more-rigorous-about-receiver-design-video\/","title":{"rendered":"Getting More Rigorous About Receiver Design (Video)"},"content":{"rendered":"<p><iframe loading=\"lazy\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen=\"\" frameborder=\"0\" height=\"247\" src=\"https:\/\/www.youtube.com\/embed\/C9ydYR9hlCk?rel=0\" title=\"YouTube video player\" width=\"440\"><\/iframe><\/p>\n<div><\/div>\n<div><b>As I finished up the receiver on my 17-12 SSB transceiver, I started to wonder &#8212; how good is it? <\/b><\/div>\n<div><b>Sure, I could hear stations on both bands, and when I got started as a homebrewer that was enough for me. But now, I find myself wondering about receiver performance. Did I get the gain distribution right? Do I have too much gain ahead of the mixer? Ahead of the crystal filter? Is the receiver generating too much noise? Can I hear the band noise? If not, why not? Do my circuits lose linearity in the presence of strong signals? What is my dynamic range?<\/b><\/div>\n<div><b><br \/><\/b><\/div>\n<div><b>This is a big complicated subject that takes time to master. <\/b><\/div>\n<div><b><br \/><\/b><\/div>\n<div><b>I am just beginning. I found the video above to be very helpful. <\/b><\/div>\n<div><b><br \/><\/b><\/div>\n<div><b>I was jealous of this fellow&#8217;s audio spectrum analyzer, but then Tony G4WIF told me that the the analyzer that this fellow was using was really just <a href=\"https:\/\/www.audiotester.de\/\">a sound card and some software<\/a>. I quickly found a similar piece of free software that lets me do the same thing he did: Look at the audio output of my receiver and watch what happens as I put an RF signal of varying levels into the antenna port. <\/b><\/div>\n<div><b><br \/><\/b><\/div>\n<div><b>I am using Visual Analyzer, a free program out of Italy: <\/b><\/div>\n<div><b><br \/><\/b><\/div>\n<div><b><a href=\"https:\/\/www.sillanumsoft.org\/\">https:\/\/www.sillanumsoft.org\/ <\/a><br \/><\/b><\/p>\n<p><b> The author of the software seems very cool&#8221; <\/b><\/p>\n<p><span style=\"background-color: white; font-family: \"trebuchet ms\", arial, helvetica; font-size: small; text-align: justify;\"><b>My name is Alfredo Accattatis; I love electronics and software, and I have been working for years in commercial companies as software\/firmware engineer and software designer. I&#8217;ve been writing programs for embedded systems (with DSP and MICROCONTROLLERS), for PC, for Avionic Computers and even for Mainframes, using C, C++, Pascal, Ada, REXX and assembly. I starting write VA during my free time just for fun and using (also) my DSP experience. The program was and is completely FREE.<\/b><\/span><\/p>\n<p style=\"text-align: justify;\"><b>More info about Alfredo here: <\/b><\/p>\n<p style=\"text-align: justify;\"><a href=\"https:\/\/www.sillanumsoft.org\/about_the_author.htm\"><b>https:\/\/www.sillanumsoft.org\/about_the_author.htm<\/b><\/a><\/p>\n<p style=\"text-align: justify;\"><b>Do you folks think I need to buy the kind of True RMS Audio Voltmeter that is being used at the end of the above video? <\/b><\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>As I finished up the receiver on my 17-12 SSB transceiver, I started to wonder &#8212; how good is it? Sure, I could hear stations on both bands, and when I got started as a homebrewer that was enough for me. But now, I find myself wondering about receiver performance. Did I get the gain &hellip; <a href=\"https:\/\/www.homebrewradio.us\/blog\/2022\/03\/26\/getting-more-rigorous-about-receiver-design-video\/\" class=\"more-link\">Continue reading<span class=\"screen-reader-text\"> &#8220;Getting More Rigorous About Receiver Design (Video)&#8221;<\/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":[329,140,57,71],"tags":[],"class_list":["post-5230","post","type-post","status-publish","format-standard","hentry","category-fishpool-tony","category-italy","category-superhet-receivers","category-test-gear"],"_links":{"self":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/5230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/comments?post=5230"}],"version-history":[{"count":1,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/5230\/revisions"}],"predecessor-version":[{"id":11406,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/posts\/5230\/revisions\/11406"}],"wp:attachment":[{"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/media?parent=5230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/categories?post=5230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.homebrewradio.us\/blog\/wp-json\/wp\/v2\/tags?post=5230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}