This is merely a historical archive of years 2008-2021, before the migration to mailman3.
A maintained and still updated list archive can be found at https://lists.osmocom.org/hyperkitty/list/osmocom-sdr@lists.osmocom.org/.
Ralph A. Schmid, dk5ras ralph at schmid.xxxEffective filtering must occur between antenna and receiver. All the problems that a saturated preamp and ADC cause can't be repaired by software. Never. Ralph. From: osmocom-sdr-bounces at lists.osmocom.org [mailto:osmocom-sdr-bounces at lists.osmocom.org] On Behalf Of David Jacobowitz Sent: Tuesday, October 22, 2013 10:45 AM To: Sylvain Munaut Cc: osmocom-sdr at lists.osmocom.org Subject: Re: odd results working at 250ksp/s Thank you. You and another forum member have helped me understand the situation. I am beginning to see the attraction of SDR platforms that integrate an FPGA immediately after the ADC. You can have wide analog filtering going to an ADC running fast, and then apply digital filters in the FPGA before downsampling to a lower rate for consumption by what-have-you. I can accomplish the same completely in software; I'll set the sample rate high, then filter and decimate, probably in a few stages to keep the filters reasonable. I tried it this evening with some raw IQ recordings I made this afternoon and it works pretty well -- on a modern PC. Regards, Dave J -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/osmocom-sdr/attachments/20131022/41beb608/attachment.htm>