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multi mode digtilasignal dection and decoding
in the last couple of weeks as I have been exploring HF I fihave found
it frustrating that I I am lloking say looking for PSK 31 I hear something else (that I don't KNOW what else is part of the problem) and try to shift mode and programs to try and read that signal but it may be gon efore I figure out which type and varraint it is what are the issues with current computer speeds and tech etc in developing software that can foucs on a given mode that are currently interested but able to detect and decoded several other (even if less well than the focus mode) so you could tell what they are and what they just said |
#2
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multi mode digtilasignal dection and decoding
"an old freind" wrote in
oups.com: in the last couple of weeks as I have been exploring HF I fihave found it frustrating that I I am lloking say looking for PSK 31 I hear something else (that I don't KNOW what else is part of the problem) and try to shift mode and programs to try and read that signal but it may be gon efore I figure out which type and varraint it is What you are probably hearing is one of the robot PACTOR stations or perhaps a rtty station, and yes it is a problem for PSK31 operators what are the issues with current computer speeds and tech etc in developing software that can foucs on a given mode that are currently interested but able to detect and decoded several other (even if less well than the focus mode) so you could tell what they are and what they just said There is one program that will identify and shift modes to another station's mode, but it relies on the other station using the same software. It was covered in this past mont's QST. It probably isn't all t that helpful if all parties have to run the same software. It should not be an impossible task to design software that can auto identify the various digital transmission modes. It is less likely that we would want to auto-switch, as we'll likely be operating in one mode at any given time. Here is a link that can help you identify the way that various modes sound: http://www.kb9ukd.com/digital/ Other info is that PSK tends to little "islands": 160 meters: 1838 KHz 80 3580 KHz 40 7035 KHz 40 7080 KHz 30 10142 KHz 20 14070 KHz 17 18100 KHz 15 21080 KHZ 15 21070 KHZ 12 24920 KHZ 10 28120 KHz Try 20 meters first - it is the busiest PSK band - 73 de Mike KB3EIA - |
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