[hpsdr] An high dynamic QSD front-end

[Marco IK1ODO]

At 22.28 06/01/2007, James wrote:

>That looks nice. I see you are using a sound card with balanced audio
>input, instead of unbalanced. How much benefit did you see that
>producing over an unbalanced audio input?
>
>For those interested, The emu1212m and emu1820m currently work in Linux
>as well as Windows.
>
>James

James,

3dB of S/N gained if you use both input signals, plus better hum and 
noise rejection. Worth doing... some cards (e.g. the famous Delta 44) 
have "simulated" balanced inputs, using only the + wire, but the EMU 
has a true balanced circuit.

Marco IK1ODO


 1168119157.0