[hpsdr] Question about modules

[Greg - ZL3IX]

Hi Mike and Greg,

No you do NOT need Alex for use with Penny.  Both Phil VK6APH and I are 
using Penny on its own.  The broad band noise floor is down around -150 
dBc/Hz, and the spurious products are low enough not to cause a problem.

I believe (Phil put me right if I am wrong) that the idea of Alex is to 
protect the Mercury Rx board from strong interferers in high population 
areas.  Personally I am using a cobbled together version of Mercury with 
high pass filters to keep out local BC interferers, and it works 
perfectly well.  In Eu and the US the 41m BC stations will be much 
louder than in OC and may be a problem.  The limiting factor on Mercury 
is ADC overload, so as long as the combined signals from the BC 
interferers are below this level, all should be well.

73, Greg, ZL3IX

Mike Naruta wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> Hi Greg,
>
>
> The Janus board was originally designed to be a
> high-performance sound card substitute for use
> with the SDR-1000.  I believe that Mercury and
> Penelope do not need the additional analog-to-digital
> and digital-to-analog converters on Janus.
>
> For Penelope, perhaps one of the alpha board
> testers can comment on the need for output filtering.
>
>
>
> Mike - AA8K
>
>   


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