[hpsdr] KW7CD articles in PDF format

[Bob McGwier]

It is clear from my conversations and  these six year old articles , 
they do not contain information that is relevant to today's 
discussions.  Analog Devices (as one example) has learned a lot about 
the source, cause, mitigations, etc. in spurious emission generation in 
DDS's in the intervening years since this research was done.  This is 
apparent when one compares the AD9959, available now, with the two 
generations earlier DDS which was used in the SDR1000.   They are as if 
from different universes.  The 9959 is not perfect but I have seen much 
worse spurious emissions from a number of late model transceivers.

Notice he makes his claim of inventor of the DDS driven PLL LO in this 
article.  It is quite an interesting read.

Bob



Ken N9VV wrote:
> ***** High Performance Software Defined Radio Discussion List *****
>
> URL for the two part QEX articles (PDF)
> http://members.aol.com/cdrentea2/Fractional-Part1.pdf
> and
> http://members.aol.com/cdrentea2/Fractional-Part2.pdf
>
> de ken n9vv
>
> FRANCIS CARCIA wrote:
>   
>> Hi All,
>> The Drentea QEX article on the synthesizer used in his latest homebrew 
>> RX is worth a read.
>> fc
>>     
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-- 
Robert W. McGwier, Ph.D.
Center for Communications Research
805 Bunn Drive
Princeton, NJ 08540
(609)-924-4600
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