[hpsdr] New HPSDR card for VHF/UHF ?

[Mike]

Very clear message, thanks.

On Sep 6, 2010, at 9:07 PM, Phil Harman wrote:

> Hi Mike,
>
> I think that it really comes down to time and effort.  Like many  
> groups
> HPSDR depends on the support of a relatively small number of active
> developers.
>
> If you are going to put time and effort into a new design then,  
> assuming
> the high performance does not come at an absorbatant cost/time,  
> building
> the best performing project you can seems to make sense.
>
> 73 Phil...VK6APH
>
>
>
>
>> ***** High Performance Software Defined Radio Discussion List *****
>>
>> While contesting is fun, there are also other activities on vhf &  
>> uhf.
>> One of them is of course satellite work and that needs full duplex.
>> Also, APRS, Dstar, EME, FM, etc...
>>
>> Does this board have to be such a high performance part?
>>
>>
>> On Sep 6, 2010, at 6:46 PM, Grant Hodgson wrote:
>>
>>> ***** High Performance Software Defined Radio Discussion List *****
>>>
>>> More numbers, opinions, speculation, dreams...
>>>
>>> I did some system calculations for a design of a 2m direct-
>>> conversion variant
>>> of the microwave SDR (uWSDR) project which I presented at the  
>>> RSGB VHF
>>> convention in 2009.  This indicates that a system IIP3 of +15dBm is
>>> achievable
>>> with a system NF of 2dB.  That's ~100dB spurious-free dynamic
>>> range, or ~150dB
>>> blocking dynamic range.
>>>
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>>
>
>


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