[hpsdr] SunSDR2 - new TRX

[Joe Martin K5SO]

On Jun 3, 2012, at 2:39 PM, Werner Karn wrote:

> Hi Joe,
>  
> thanks for your quick precise answer. I recently read one of your articles, where you described your software development to do phasing with 3 standard receivers and with the standard HPSDR Atlas bus. I thought this could be a very important feature for the ham community, at least for myself, but it looks like it is no longer supported with the Hermes development ? Or will your 3 Rx phasing software work with 3 Hermes boards as well ?
>  
> 73,
>  
> Werner   
> 
> 2012/6/3 Joe Martin K5SO <k5so at valornet.com>
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi Werner,
> 
> The short answer is NO.
> 
> The reason is that separate, independent antenna inputs to multiple, independent ADCs is required to do phasing work.  Hermes has only a single ADC and a single antenna input.
> 
> That fact is the reason there has been a bit of discussion regarding the possibility of developing a multiple-ADC board, not for Hermes, but for DF and phasing applications in general with the standard HPSDR Atlas bus.
> 
> Multiple Rx on Hermes allows the user to tune to multiple frequencies independently anywhere in the roughly 0-60MHz range but they are not suitable for phasing work as there is only one input port for the rf signal into the Hermes board so it is not possible to measure differences in phase angle between signals arriving at different antennas in the DF/steering antenna array.
> 
> 73,  Joe K5SO
> 
> 
> On Jun 3, 2012, at 1:48 PM, Werner Karn wrote:
> 
> > ***** High Performance Software Defined Radio Discussion List *****
> >
> > Alex, Joe,
> >
> > will this also allow for direction finding and antenna steering per software ? 4 or7 receivers on the same frequency should allow for a good gain in wanted and nulling in unwanted direction.
> >
> > 73,
> >
> > Werner
> 
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