All: Turned on my radio to listen to the ARRL 160, and saw "it". First thought was "what piece of crap in my house is doing THAT". But as we now know, its something big. Since CODAR was suggested, I compared it to CODAR around 4.8 MHz. Similar, but not the same. BW is similar, but the CODAR I saw sweeps high to low about once every 1.5 seconds where this sweeps low to high about 3 times per second. CODAR looks to be one carrier (with some pulse-ish modulation) while this one looks to be two carriers, one delayed by a short time interval (maybe 100 ms.) and starting at a slightly (aprox. 200 Hz) higher frequency. Carriers modulated with a fast rise time waveform, giving us the raspy sound. Hope this info helps us figure out what this is. 73, Mike, WV2ZOW
On Tue, Dec 9, 2014 at 9:55 AM, Roger D Johnson <[email protected]> wrote: > Here is a YouTube video of a CODAR signal. Doesn't sound like what I'm > hearing > at all! > > https://www.youtube.com/watch?v=zupfLO1PjrA > > 73, Roger > > > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband
