Hi Les, Walt Salmaniw can tell you about the SDR-IQ vs. Perseus, as he owns both receivers. I'll mention that the RFSpace receivers are more like laboratory test equipment in their operation, and in some ways not useful for quick and easy DXing as Perseus. However, Perseus definitely has its quirks and issues too! These advanced receivers are in their infancy, and it will be exciting to see what the next few years will bring as SDRs mature and become more polished.
MW Splatter Rejection is a new feature introduced in Perseus (beta version) that helps reduce splatter from an adjacent channel signal that is overlapping your desired station. Using the number-crunching power of the computer, this feature takes the opposite "clean" sideband of the QRMing station and uses it in a phase-inversion fashion to subtract the splatter from the DX signal. A description of how it works is found here: http://microtelecom.it/perseus/amrej.html After becoming familiar with the steps, it takes just a few seconds to activate the feature on a signal. The limiting factor to success, I believe, is multipath distortion that may be present on the QRM signal. The times I've been successful with this new feature, it has worked very well. Other times...nada. There is a WAV file of an early version (experiment) of MW *co-channel* interference supression available to listen to. It is found on the Perseus SDR Yahoogroup in the files section. This recording was made by the designer of Perseus, Nico Palermo, while he experimenting with co-channel supression techniques, all in software. The new tool in Perseus is for *adjacent* channel splatter interference. It's not known yet if we will see the co-channel supression feature in a future version of the receiver software. 73, Guy Atkins Puyallup, WA USA www.perseus-sdr.blogspot.com -----Original Message----- From: Les Rayburn [mailto:[EMAIL PROTECTED] Sent: Wednesday, July 02, 2008 1:09 PM To: [EMAIL PROTECTED]; [email protected] Subject: Re: [IRCA] Perseus Vs. RF Space SDR-IQ I'm an owner of the RF Space SDR-IQ, and have been very impressed with it's capabilities. It easily compares to any high end MW receiver that I've ever owned including the Drake R8B and AOR 7030. Been following the news of the Perseus, and would love to hear more about the "MW Splatter Rejection" feature. What is it? How well does it work? Also, I'd love to hear someone compare the SDR-IQ with the Perseus in regards to MW DXing... 73, Les Rayburn, director High Noon Film 100 Centerview Drive Suite 111 Birmingham, AL 35216-3748 205.824.8930 205.824.8960 fax 205.253.4867 cell _______________________________________________ IRCA mailing list [email protected] http://montreal.kotalampi.com/mailman/listinfo/irca Opinions expressed in messages on this mailing list are those of the original contributors and do not necessarily reflect the opinion of the IRCA, its editors, publishing staff, or officers For more information: http://www.ircaonline.org To Post a message: [email protected]
