Hi Bernie, I am running a Perseus SDR receiver with 2.5 GHz Asus quad core CPU and 8 MB of ram. The OS is Win 7 64 bit. No echo here unless I am sync up to the Icom receiver and trying to use them both at the same time. There is a little bit of latency with the SDR. The sound is very good and the Sync detector is the best I have used so far. It's a little on the noisy side with no signals. A hint was given on the reflector to bump up the AGC threshold and that seems help some. Also a suggestion from Robert, W0VMC, was to use a better sound card instead of the internal sound card that is on the motherboard. The Perseus doesn't use the sound card for demodulation, but for audio out. In a way I wish the receiver had it's own line level out instead of using the computer's sound card. A better sound card with more ram should off load the CPU, but not sure that would help the latency much? I am mainly wanting to lower the noise floor even more if that is possible. The spectrum scope and waterfall are very useful. I got another program called HF span that makes it into a nice 40 MHz spectrum analyzer. Overall a very powerful box.
73 de w5jay/jay.. -------------------------------------------------- From: "Bernie Doran" <qedconsulta...@embarqmail.com> Sent: Wednesday, February 10, 2010 12:02 PM To: "Discussion of AM Radio in the Amateur Service" <amradio@mailman.qth.net> Subject: [AMRadio] sdr-iq > I purchased an SDR-iQ about five weeks ago and while it performs great in > a > number of areas it seems to be poor in the audio demodulation, at least on > AM, I am getting what sounds like a low level echo and a general > artificial > quality of sound, my 75A2 sounds much better and that certainly is not > good > quality audio. it is difficult to copy a moderate level AM signal. the > computer plays DVDs and CDs fine and sounds good. I talked to the store > that > I purchased it from and they said they have heard this before and that I > should not expect it to sound like a VT receiver!!!!! that was a shock, > what did I buy it for?. computer is a single core 2.8 gig, it shows it > running at about %75. any one else use these things? or have experience > with > the Flex 5000a? Bernie > > > ______________________________________________________________ > Our Main Website: http://www.amfone.net > AMRadio mailing list > Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ > List Rules (must read!): http://w5ami.net/amradiofaq.html > List Home: http://mailman.qth.net/mailman/listinfo/amradio > Post: AMRadio@mailman.qth.net > To unsubscribe, send an email to amradio-requ...@mailman.qth.net with > the word unsubscribe in the message body. > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Our Main Website: http://www.amfone.net AMRadio mailing list Searchable Archives: http://www.mail-archive.com/amradio@mailman.qth.net/ List Rules (must read!): http://w5ami.net/amradiofaq.html List Home: http://mailman.qth.net/mailman/listinfo/amradio Post: AMRadio@mailman.qth.net To unsubscribe, send an email to amradio-requ...@mailman.qth.net with the word unsubscribe in the message body. This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
