[evlatests] Hysteresis in Tuning failures

David Harland dharland at nrao.edu
Mon Jun 21 12:30:10 EDT 2010


Ken Sowinski wrote:
> ...I offer below a table for future reference that
> purports to map synthsizers to basebands which can be used as a
> guide when generating flag tables.  Someone should look at it with
> care to see if I have made any mistakes...
>
>
> The L302s are easy.  First column for 8 bit samplers, second
> column for 3 bit samplers.
>
> syn     8bit 3bit
> ===     ==== ====
> L302-1   AC   AC1
> L302-2   BD   BD1
> L302-3   --   AC2
> L302-4   --   BD2
>
>
> Determining which basebands are affected by a broken L301 is much
> more complicated.  'AC' and 'BD' denote all possible baseband pairs
> regardless of which samplers are used.  'BD-T303' denotes BD is bad
> if it goes through the T303 conversion path.
>
> band       L301-1   L301-2
> ====       ======   ======
> P,L,S,C      AC       BD
> X            --       --
> Ku           AC       BD
> K,Ka,Q      all      BD-T303
>   
Ken, an XML file i use in the SSS model of the antenna electronics 
agrees w/ your tables. --David



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