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 2/9/2010 12:11 PM
 

I used a softrock receiver in SDR-Radio see http://m0zeh-sdr.blogspot.com/. The LO frequency has to be controlled from another program at the moment. I can receive stations clearly but don't know what frequency they are as Simon has not implemented this function yet.

Looking forward to more functions such as bandscope for my ICOM via HRD.

Good luck Simon.

Steve - M0ZEH

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 3/16/2010 12:32 PM
 
Having used my V8.3 receiver for many hours now over a period of months. I have noticed in the text for the op amps stage http://www.wb5rvz.com/sdr/RX_V8_3/IV_..., final output is 5V p-p. Is the input to most sound cards lower than this? I seem to have to set the input mixer in software to extremely low levels!
I propose to put an attenuator circuit on the output of my softrock but I'm concerned it would affect the balance of IQ. I don't want to adjust the gain of the op amps as I know frequency response may be affected if I do this.
What voltage levels do the other SDR's output?
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