[hpsdr] New HPSDR card for VHF/UHF ?

[Phil Harman]

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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