Re: [softrock40] spurs
- As you are getting the problem with all of them I am assuming that there
is not a problem with the build, i.e. solder bridges, coils wound
I would suspect the sound card interface is mono, not stereo, and so is
unable to null the opposite image or that one of the channels on the
soundcard has a low input level.
If you run Rocky you should see similar levels being displayed for both
the I and Q channels if it is working correctly.
I can run mine using the internal chipset and get excellent image rejection.
AD6HF wrote On 06/27/06 22:58,:
> I've built softrock v5.0,v6,0&v7.0, and they have been working
> I use Rocky,winRad1.1 sdr power. on every band and using every
> software I get spurs and see both sidebands of a cw signal.
> I am using the sound card that my computer's chipset had built in.
> Is the poor dynamic range of my sound card responsible for the spurs
> and the extra sidebands?
> 73 Bob AD6HF
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