I believe that both have a space under the sun. The charm of the simulator tests is _repeatability_, even when the results on the air might be different.On the air, you cannot have repeatability, so, the results, even when real, are harder to correlate.
Yesterday I attmoted to get some real noise samples at my QTH, but we are having rather quiet days by the end of the week. I have been thinking that a PRN generator triggering a sound card "static crash generator" would be a further good approach to the real world, but the results might not be as repeatable as with gaussian white noise. I have been recalling of some CW pileup generators used for training. The algorithm could be similar, but generating "crashes" instead of Morse code. Ther random generator or generators could be representatuive of the lower bands, while another repetitive with pseudo random period shifts could be representative of spark plug noise which is more prevalent in urban environments on 10 or 6 meters. 73, Jose, CO2JA --- Tony escribió: > Patrick, > > >> I for one would like to try different modes and compare them >> under real conditions. There can be too many variables. >> > > I agree, I think the simulator can tell a lot about mode performance, but it > has it's limitations. > > It might be a good idea to test modes according to type. Seems fruitless to > compare a mode that's known to be extremely sensitive and robust against the > "average" chat mode. > > Good point about switching frequency when testing; need to mind the wide > modes in the narrow band segments etc. > > There was a lot more activity along these lines when sound-card modes were > first introduced. Wonder if anyone recalls digital beaconing? > > Station S59DOR had one on 10 meters that would transmit the different > Hellschreiber modes. > > Macros allowed the software (IZ8BLY's Hellschreiber) to switch modes > automatically. Have a screenshot of the beacon if anyone is interested. > > Glad to see the enthusiasm Patrick! It's the stuff that keeps the hobby > alive. > > Tony, K2MO > Kings Park, NY > > ------------------------------------ Announce your digital presence via our Interactive Sked Page at http://www.obriensweb.com/sked Check our other Yahoo Groups.... http://groups.yahoo.com/group/dxlist/ http://groups.yahoo.com/group/contesting http://groups.yahoo.com/group/themixwgroup 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/
