[hpsdr] SunSDR2 - new TRX

[Werner Karn]

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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