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#1
June 9th 05, 03:07 AM
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trying to come up to speed
Greetings
Well this message is partly about digital misc and partly about me.. I hope you will excuse the lack of complete compliance.. To help you answer my question, a little about me.. I got my licence in 1964. at the age of 16...same call sign since.. Hams made the change over from am to ssb during the 60's. During the early 70's, hams made the change from local hf to vhf and vhf am to fm... Then came packet during the 80's... I left ham radio, without really knowing it, during the mid 90's... I just realised I was not on the air... Now comes my question... Where is ham radio going now?... I don't know how I got there but I found myself on the arrl website reading something about digital audio on hf.. apparently you can now put an audio bandwidth of about 10 khz onto a 3 khz transmitted bandwidth.... sounds, no pun intended, interesting... Can someone give me a website that can more, or better, explain how the process is done? Does it cause any kind of distortion on the transmitted signal?... Larry ve3fxq |
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#2
July 2nd 05, 06:42 PM
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larry wrote: Greetings Well this message is partly about digital misc and partly about me.. I hope you will excuse the lack of complete compliance.. To help you answer my question, a little about me.. I got my licence in 1964. at the age of 16...same call sign since.. Hams made the change over from am to ssb during the 60's. During the early 70's, hams made the change from local hf to vhf and vhf am to fm... Then came packet during the 80's... I left ham radio, without really knowing it, during the mid 90's... I just realised I was not on the air... Now comes my question... Where is ham radio going now?... Not wishing to seem less than helpful, but that is a GOOD question, exploding in various unfocused direction is perahps thefairest answer I don't know how I got there but I found myself on the arrl website reading something about digital audio on hf.. apparently you can now put an audio bandwidth of about 10 khz onto a 3 khz transmitted bandwidth.... sounds, no pun intended, interesting... Lots of stuff can be done but not sure you can find another to dance with, unless you like talkingto yourself Can someone give me a website that can more, or better, explain how the process is done? Does it cause any kind of distortion on the transmitted signal?... Larry ve3fxq |
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