Re: [GenesisRadio] panadapter base line [1 Attachment]
thanks for attachements
finally i removed the 4 pieces 220pF capacitors and now i have only+-2db aprox.
it is ok now
on genesis setup hardware config , continous tuning , i don't see some change, what ?
> Message du 09/04/13 17:53
> De : "Bruce KF1Z"
> A : GenesisRadio@yahoogroups.com
> Copie à :
> Objet : Re: [GenesisRadio] panadapter base line [1 Attachment]
>Not sure...My Xonar doesn't show that much drop at the edges...Brucekf1z
> good evening to all.
> I have a G11 with is working nice but i have a question .
> with no antenna connected (only a 50ohm dummy load ),
> the base line of panadapter is within +-1db on a 180khz width
> using 192khz span with an EMU1212 , it is very nice!
> but with antenna connected, the base line of atmospheric noise
> is -10db at both edges and 0db at center. On all band it is the same.
> I used another sdr transceivers with diodes balanced mixers with the same PC and audio card
> and i have not this problem , base line is the same.
> Is it due to Tayloe mixer ?
> it seems that the four 220pf capacitors on Rx audio AOP give -3 to -4db
> less at both edges, but not 10db.
> If anybody has an explanation, it will be helpfull