RE: [softrock40] Re: Confused about what I hear on the air with an Ensemble II receiver
- Id say not really .. depends on your spikes ....
I set my offset enough to keep soundcard spikes out when running USB or LSB ....
Date: Mon, 3 Dec 2012 16:57:37 +0000
Subject: [softrock40] Re: Confused about what I hear on the air with an Ensemble II receiver
Thanks for the help Alan and Ignacio. It has been beneficial. Is there a rule of thumb for how far to place the LO from the desired tuning frequency?
--- In email@example.com, "Alan" <alan4alan@...> wrote:
> ----- Original Message -----
> Subject: [softrock40] Re: Confused about what I hear on the air with an Ensemble II receiver
> > My thanks to all for the input. Apparently the Realtek Line-Input on my computer is not really stereo. I moved to the mic jack
> > with a stereo cable (the same one that was in use on the line-in jack) and the dual images disappeared.
> If that really is Line input it should be stereo. Are you sure that some mixer setting is not wrong?
> But then I started having hum problems which I assume are group loops but have not been able to run down the source of the ground
> loop yet, tricky!!.
> The microphone input is usually far too sensitive. If you have to use it look for a way of turning off the preamplifier in the mixer
> > Perhaps I am not understanding how to use the LO as opposed to not needing it. Yes, I find as suggested moving the LO makes the
> > major carrier move away but that strikes me as odd. Will a better sound card reduce that carrier?
> With all soundcard SDR you need to avoid the centre where the spike is. Some cards have a very small spike but you still have to
> avoid the centre.
> >Do other SDR's exist (within reasonable price) that do not require a sound card, don't have the LO thing and work with HDSDR.
> Many manage soundcard SDR without complaint. I'd say get used to it.
> The Softrock is a cheap introduction that works surprisingly well.
> HDSDR is basically soundcard software. It does work with a cheap dongle, but I do not know any more apart from the fact that has a
> centre area that should be avoided.
> Many direct sampling SDRs have to be used with custom software.
> 73 Alan G4ZFQ