Until you have affordable DSP's that can output substantial RF power at frequencies between 1.8 mHz and 30 mHz, analog devices will still be needed to translate and amplify the SDR generated signals. Consequently, you will still have the issues I have mentioned to deal with. Jim WA0LYK --- In [email protected], Jose Amador <[EMAIL PROTECTED]> wrote: > > > I think it is not the only solution needed. A wider > radio might be needed too (rules allowing, that is). > > So far, I see a Software Defined Radio as the > solution. > You may, then, define the bandwidth you NEED on the > fly. > > In the cell phone business, the operators see SDR as > the solution, because it is impossible to recover the > investment costs in the short time new ideas > (services, protocols, etc) show up. A cellular phone > radio base could be updated to newer formats and > services just by reflashing the controller. > > 73 de Jose, CO2JA > > --- Charles Crizer <[EMAIL PROTECTED]> wrote: > > > Spot on. > > > > What about desgining and building a "QRP" radio for > > digital use. > > > > Its seems to me that some of the problems you > > mention are because the radio > > is made for many modes. What if the radio was just > > build for RTTY, PACKET, > > PSK31, PACTOR, etc? > > > > Instead of a 300-3500Hz audio bandwidth, it could be > > much tighter and > > desigend for the exact mode being used. After all, > > isn't that the way CW QRP > > rigs are desigend? They only have to work with a > > very narrow bandwidth. > > > > Charlie Crizer, KF4MNE > > Fairfax County (Alexandria) Virginia, US > > QTH: 38-47.96N / 77-05.17W - FM18kt > > [EMAIL PROTECTED] > > [EMAIL PROTECTED] - Winlink2000/Airmail > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam protection around > http://mail.yahoo.com >
Need a Digital mode QSO? Connect to Telnet://cluster.dynalias.org Other areas of interest: The MixW Reflector : http://groups.yahoo.com/group/themixwgroup/ DigiPol: http://groups.yahoo.com/group/Digipol (band plan policy discussion) Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/digitalradio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/digitalradio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
