...Assuming the use of strong mixers (+50dbm)...
Hmmm. +50 dBm = +20 dBW = 100 watts! That's some mixer!!!
...Great will be the day when a DSP unit running at VHF,
with a high IP3in etc, and low noise figure becomes practical.
An interesting approach to this is the SDR-14 from rfspace. It directly
digitizes the entire HF spectrum -- and by using input bandpass
filters can digitize up through the 222 MHz band. I have listened to 2
meter signals on mine.
The front end isn't as strong as a contesting station would need -- yet.
Meanwhile, for high-performance, a strong front-end followed by a
crystal filter suited to the mode and signal level, enhanced by a DSP
seems to be the best practical implementation.
Lyle KK7P
_______________________________________________
Elecraft mailing list
Post to: Elecraft@mailman.qth.net
You must be a subscriber to post to the list.
Subscriber Info (Addr. Change, sub, unsub etc.):
http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/subscribers.htm
Elecraft web page: http://www.elecraft.com
