On Thu, Mar 15, 2012 at 3:13 PM, Poul-Henning Kamp <p...@phk.freebsd.dk> wrote: > In message <20120315152620.8347488e049854218aed4...@kinali.ch>, Attila Kinali > w > rites: > >>> Do you need 16 bits or can you get by with a 12 bit ADC? > > In general: The more the merrier, for a digital dude like me, having > more bits is easier than getting AGC working correctly :-) > >>> Have you considered using an FPGA for signal processing? It seems >> you need a fairly serious CPU to handle that much data.
"That much data" we are talking about 192K samples per second. I can routinely record multiple tracks of 192K audio and do processing in real time and the CPU meter hardly moves the bottom. Even a gigabit per second Ethernet port is not "a lot of data" on a modern computer. FPGAs and DSP come into play if you are talking about tens of millions of samples per second with data rates above say 200Mb/Sec But the rate from an audio interface running 192K and 24-bits is still under one megabyte per second. An interesting ratio is the number of CPU cycles available to process one sample. On my Apple iMac that would be about roughly 200,000 operations per data sample. In real life SDR receivers even an older CPU can process the I and Q channels and maintain a large graphic screen and send and receive data over a network and still not be "maxed out" Chris Albertson Redondo Beach, California _______________________________________________ time-nuts mailing list -- email@example.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.