Re: [softrock40] Initial testing with ensemble rxtx. All sorts of confusion.
The mirroring and signals moving away from center on both sides would
indicate a mono mic input on your sound card. Gotta be stereo.
On Tue, Oct 23, 2012, at 05:37 PM, kk4dcf wrote:
> Finished building last night. I'm just doing some initial testing with rx
> and I'm very confused. I'm new to ham radio, kit building and sdr.
> Basically I have no idea what I'm doing.
> Sometimes I get what appears to be mirroring.
> Sometimes when I tune up, the signal moves away from center on both sides
> Sometimes when I tune up, I get this.
> Most places on 20m I get the kind of behavior I would expect while
> On 20m I can find cw and data protocols to listen to but there seems to
> be an excessive amount of noise across everything.
> All this testing is being done with an endfed 10/20/40 dipole lying on
> the floor down the hallway so I'm not expecting much but I'm not
> understanding what I'm getting. I had this strung out the window last
> night and things seemed much worse.
> IQ is coming in via a griffen imic usb sound card. I've tested on several
> computers and get similar results.
> I'm lost.
----- Original Message -----
Subject: Re: [softrock40] Initial testing with ensemble rxtx. All sorts of confusion.
> The mirroring and signals moving away from center on both sides would
> indicate a mono mic input on your sound card. Gotta be stereo.
Sometimes fast moving signals like these are due to strong interfering signals at odd multiples of the tuned frequency.
With a mono input all signals will be duplicated and move at the same rate as the LO.
73 Alan G4ZFQ