{"id":7344,"date":"2013-11-05T08:00:12","date_gmt":"2013-11-05T12:00:12","guid":{"rendered":"http:\/\/www.engineeringradio.us\/blog\/?p=7344"},"modified":"2023-03-29T14:02:06","modified_gmt":"2023-03-29T18:02:06","slug":"analog-sauce","status":"publish","type":"post","link":"https:\/\/www.engineeringradio.us\/blog\/2013\/11\/analog-sauce\/","title":{"rendered":"Analog Sauce"},"content":{"rendered":"\n

A little blast from the past. This was found in a transmitter manual at one of the sites we take care of:<\/p>\n\n\n\n

\"CCA<\/a>
CCA Optomod 8000<\/figcaption><\/figure>\n\n\n\n

I thought I would scan it and make it available here.\u00a0 As luck would have it, there is also a corresponding piece of equipment to go along with it.\u00a0 I had never seen a “CCA Optomod<\/a>” (.pdf) before I was working at one of the radio stations in Trenton, Florida.\u00a0 This unit was rescued from under a pile of garbage out in the lawn shed.\u00a0 It was full of mud wasp nests and mouse droppings.\u00a0 Needless to say, it required a bit of TLC to return it to operation.\u00a0 I replaced the electrolytics, cleaned it up, and ran some audio through it.\u00a0 It is probably as good as the day it left the factory.\u00a0 Bob Orban made some really good stuff in his day.<\/p>\n\n\n\n

\"CCA<\/a>
CCA Optomod 8000<\/figcaption><\/figure>\n\n\n\n

The original Optomod 8000<\/a> was an evolutionary design that made FM radio processing what it is today.  The idea of combining broadband limiter, AGC and stereo generator in one box was a radical departure from the norm.  The audio limiter functioned as a 15 KHz low pass filter and broadband AGC.<\/p>\n\n\n\n

\"Orban<\/a>
Orban Optomod 8000 audio limiter block diagram<\/figcaption><\/figure>\n\n\n\n

The stereo generator used very modest amounts of composite clipping to reduce overshoot and transients. Many people disparage composite clippers. If done correctly, it is transparent to the listener and increases perceived loudness by stripping off modulation product that is non-productive.<\/p>\n\n\n\n

\"Orban<\/a>
Orban Optomod 8000 Stereo Generator block diagram<\/figcaption><\/figure>\n\n\n\n

Some thirty five or so years later, there are still many of these units in service in various stations around the world.<\/p>\n","protected":false},"excerpt":{"rendered":"

A little blast from the past. This was found in a transmitter manual at one of the sites we take care of: I thought I would scan it and make it available here.\u00a0 As luck would have it, there is also a corresponding piece of equipment to go along with it.\u00a0 I had never seen … Continue reading Analog Sauce<\/span><\/a><\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[102,4],"tags":[82,70],"class_list":["post-7344","post","type-post","status-publish","format-standard","hentry","category-audio","category-tech-stuff","tag-fm","tag-fm-processor"],"_links":{"self":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/7344","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/comments?post=7344"}],"version-history":[{"count":8,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/7344\/revisions"}],"predecessor-version":[{"id":11321,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/posts\/7344\/revisions\/11321"}],"wp:attachment":[{"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/media?parent=7344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/categories?post=7344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.engineeringradio.us\/blog\/wp-json\/wp\/v2\/tags?post=7344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}