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www.southgatearc.org
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DominoEX - new mode announcement!We've done it again! After two years of development, I am pleased to announce a GREAT NEW MODE for you to enjoy over the holiday period! You may never use RTTY again! This mode is a serious contender for NVIS propagation on 80m and 40m, and also works well on other bands. It is fast, slick, reasonably narrow and has no tuning difficulties. The mode uses a varicoding technique and achieves high typing speeds with an extended-ASCII character set. Six speeds are offered - like a manual (stick shift) car, when the going gets tough, just change down! The new mode is called DominoEX. It uses a completely new modulation technique called Offset Incremental Frequency Keying, which is an MFSK-family technique, using 18 tones. This technique solves both the tuning difficulties of other narrow modes, and adds considerable tolerance of low-band multi-path effects by avoiding repeated and adjacent tones. Sensitivity is very good, and the mode is reasonably robust without requiring FEC, and is so easy to tune it will handle offsets up to 200Hz and drift up to 200Hz/minute! The application carries and displays a full-time 'secondary channel' for automatic ID. You can change the ID message any time. A simple fully functional Windows sound card application demonstrating the new technology has been written by Con ZL2AFP, and is available for FREE DOWNLOAD on my web site. This application looks good, has nice built-in macros, good meters, and the clearest, most sensitive waterfall you will have EVER seen! A DLL for MIXW is under development. This will be open source and available for other developers. We expect to have versions of the mode in MULTIPSK and probably for LINUX in the New Year. Other applications for Offset IFK technology are being considered, and in time FEC and file transfer options will be added. For more information and to download the working application, see: http://www.qsl.net/zl1bpu/MFSK/DEX.htm All the technical info and Help stuff is there as well. 73, Murray ZL1BPU
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