jayw5jay at cox.net
Wed Feb 10 16:00:55 EST 2010
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" <qedconsultants at embarqmail.com>
Sent: Wednesday, February 10, 2010 12:02 PM
To: "Discussion of AM Radio in the Amateur Service"
<amradio at mailman.qth.net>
Subject: [AMRadio] sdr-iq
> I purchased an SDR-iQ about five weeks ago and while it performs great in
> 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
> quality of sound, my 75A2 sounds much better and that certainly is not
> 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
> 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
> the Flex 5000a? Bernie
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