[hpsdr] Comments on setting up PureSignal

[Bill Diaz]

Brian,
     I am not disagreeing with what you wrote.  I simply provided out a 
practical method for determining the external sample level and internal 
attenuation needed to overcome the internal crosstalk, which will be 
different for each band and power level used.

Bill KC9XG
On 2/26/2014 11:07 AM, Brian Lloyd wrote:
> On Wed, Feb 26, 2014 at 10:49 AM, Bill Diaz <william.diaz at comcast.net 
> <mailto:william.diaz at comcast.net>> wrote:
>
>     ***** High Performance Software Defined Radio Discussion List *****
>
>
>     Brian,
>         Based on extensive testing by Mukesh, KE3VG, with a ClearRF
>     sampler, good results were achieved on 20 and 40 meters when the
>     external sample level was 6db higher than the observed internal
>     crosstalk level on that band.  This may not be practical on the
>     higher bands due to the higher crosstalk at higher frequencies.
>
>
> Well, I stand by what I wrote. Every radio/amp/coupler/frequency 
> combination will be different. Each person is going to have to adjust 
> their setup to match their equipment. I wanted to lay out the PROCESS 
> by which maximum performance can be achieved. I didn't address the 
> issues of filter selection or other parameters. Someone who knows 
> those effects better than I should do that. Regardless, what I posted 
> is correct and useful.
>
> As a final point, no one seems to be addressing the issue of reducing 
> stray coupling inside the ANAN 100. That alone would provide the 
> biggest improvement and make all the other settings less critical.
>
> -- 
> Brian Lloyd, WB6RQN/J79BPL
> 706 Flightline Drive
> Spring Branch, TX 78070
> brian at lloyd.com <mailto:brian at lloyd.com>
> +1.916.877.5067

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openhpsdr.org/pipermail/hpsdr-openhpsdr.org/attachments/20140226/4fe7cd50/attachment-0004.htm>