[hpsdr] QSD gain and noise.

[Johan Maas]

Hello All,


Together with Ramkrishnan(VU3RDD) iam working on design an ISD based receiver by using 180 degree switches.

The idea is to make use of an NCO implemented in the ozy FPGA and controlled via powersdr (realized).

In the attachment you will find a scheme which will be used for further experiments (different configuration options can be set by jumpers). It contains an balanced and unbalanced exit.

But after reading some previuos mails i think we should an additional buffer for low impedance output!

Goodluck,

73 Johan PA3GSB





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