> On Apr 27, 2016, at 9:31 AM, Joe Subich, W4TV <[email protected]> wrote
> Adam adds a lot to the discussion. The 7300 is actually a "hybrid" > DSR ... direct down conversion being used to drive the SDR "back end" > typical of Icom's current generation of transceivers. In essence, > the direct sampling front end replaces the traditional analog up- > conversion front end and is responsible for a much "cleaner" (less > phase noise, etc.) transceiver. The selectivity, AGC and features > are derived from the 36 KHz DSP "back end". Joe, I know this thread was closed earlier today, but I just wanted to clarify that the IC-7300 is a "pure" direct-sampling SDR. The architecture that you described is more in line with direct-conversion SDRs such as the KX3. I also asked myself why ICOM did not go the extra mile and provided more than one receiver on the IC-7300 since the whole spectrum is available on a direct-sampling SDR. The only reason that occurred to me is that its FPGA is not big enough to handled/process the stream of data arriving from the ADC that is necessary to produce more than one of receiver (slices). 73, Robert-KP4Y/W4 Sent from my iPhone ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to [email protected]
