[hpsdr] ALEX - Call for comments

[Robert McGwier]

Yo Phil!

Could you get better filter designers next time?!

Nice job.

73's
Bob



pvharman at arach.net.au wrote:
> ***** High Performance Software Defined Radio Discussion List *****
> 
> Hi Glenn,
> 
> At the moment the filters do not overlap with the exception of the 17/15m and 
> 12/10m ones. 
> 
> The filters are really an option - it depends on your location, antennas, local 
> stations etc. We expect the large signal performance of Mercury and a QSD 
> receiver to be very good but there may be occasions when more filtering would 
> be helpful.
> 
> Mercury will operate as a wide band spectrum analyzer hence the ability to 
> bypass Alex when used in that mode. 
> 
> An alternative is to make variants of Alex - we can have broadband versions or 
> SWL band versions by changing the L and C in each filter section.  If you can 
> tolerate the additional insertion loss ( and this should not be an issue on the 
> HF bands) then you can daisy chain multiple Alex cards on the Atlas bus. 
> 
> Thanks for your feedback. 
> 
> 73's Phil...VK6APH
> 
> 
> 
> 

-- 
AMSAT Director and VP Engineering. Member: ARRL, AMSAT-DL,
TAPR, Packrats, NJQRP, QRP ARCI, QCWA, FRC. ARRL SDR WG Chair
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