Novi Kenwood in FT-5000 sta postaji z 10,7 in 9 MHz MF. Mene bolj zanima ADAT-200A zgodba z 14-bitnim ADC celega KV.
LP MMM S56A ----- Original Message ----- From: "Aleksander Žagar" <[email protected]> To: <[email protected]> Sent: Thursday, July 29, 2010 8:42 PM Subject: Re: [S5ham] Skrivnost K3 uspeha! > Jaz pa c(akam, da bodo vse to naredili pri Kenwoodu, Icomu ali Yaesu-tu, > namrec(, ne morem razumet, zakaj tega še niso. Morda bo novi Kenwood > prav to. In da bi takšen radio imel USB povezavo s PC in vse tiste > ''fensi'' skoupe na ekranu PC-ja, (kot jih reklamirajo pri FlexRadiu > 5000) medtem, ko bi ohranil ''škatlo'' z vfojem, kot dobri stari > štacjoni, le da bi bil to štacjon, kot pravi Marjan, pravi ''linearni'' > SDR. Da bi c(lovek imel obe možnosti, VFO in klik z miško na ekranu, > recimo. Navada dela .... > > 73, 7S > > S56A pravi: >> >> ** >> >> *Pravkar sem koncal ponovno branje 20 nadaljevanj G3XJP zgodbe o >> pic-a-star homemade radiju.* >> >> *Konec zgodbe je zanimljiv ker pojasni veliki uspeh K3 radija na uho >> pri KV tekmovalcih ampak tudi na ARRL testu.* >> >> *Podoben povdarek je imel YU1LM, ko mi je razlagal HiFi sprejem s SDR. >> Mene KV motnje sicer ne motijo :-)* >> >> *LP MMM S56A v rdeci barvi Moskovskega WRTC!* >> >> *P.S. Orion je tudi izredno prijeten na uho predvsem zaradi cistega >> lokalnega oscilatorja!* >> >> *THE LINEARITY CONUNDRUM* >> >> Why does a STAR sound so good both on >> >> receive and transmit? There can only ever >> >> be one answer. It is because it is linear. >> >> Because STAR is an IF processor it has a >> >> built-in head start over any AF add-on. The >> >> latter may indeed be better than nothing, but >> >> if the DSP has neither control of the AGC >> >> nor of the detection process then the >> >> damage has already been done - so to speak >> >> - before there is any chance to benefit from >> >> subsequent DSP. >> >> Thereafter, most of the 'star quality' >> >> derives from the inherent nature of digital >> >> (as opposed to linear analogue) signal >> >> processing. >> >> With analogue processing the quality is >> >> determined ultimately by device linearity. >> >> Any non-linearity - and all devices have >> >> some - results in intermodulation distortion >> >> products which can fall within the passband. >> >> And to a varying extent they grate on >> >> the human ear - which is particularly >> >> sensitive to their presence. >> >> With digital processing the nature of any >> >> distortion is quite different. It arises from >> >> rounding errors, quantisation errors and >> >> lack of arithmetic precision generally. >> >> So long as the system is not grossly >> >> overloaded (in which case it would fall >> >> apart in a big way) these errors do /not /result >> >> in discrete in-band IMD products. >> >> Rather they result in a general noise floor >> >> - of trivial amplitude. And in any practical >> >> HF radio communication system this noise >> >> is indistinguishable from and is buried well >> >> below the band noise. There are simply no >> >> conventional IMD products to hear. >> >> So the answer to the conundrum is this - >> >> and it may not be instinctive. Digital signal >> >> processing is inherently more linear ….. >> >> than linear analogue processing. >> >> This is the technical rationale for the PICA- >> >> STAR project. And the ultimate rationale >> >> for the project? You may have guessed it >> >> by now. Promoting the interests of /amateur radio!/ >> >> > > > ------------------------------------ > > Yahoo! Groups Links > > > ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S5ham/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S5ham/join (Yahoo! ID required) <*> To change settings via email: [email protected] [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/
