[evlatests] Terminology

[Rick Perley]

    The letters A, B, C, and D are all well understood to refer to the 
four T304 downconverters, such that 'A' is RCP of IF#1, 'B' is RCP of 
IF#2, etc.  I think these should be retained in the descriptors.
    Looking at the existing block diagram, we see that the three outputs 
from any one downcoverter are already labelled:  A, A1, and A2, for 
example.  (A is the 8-bit output, A1 and A2 are the first and second 
3-bit outputs). 
    So I suggest retaining this system, despite it being 'wordier'.

    Rick

Barry Clark wrote:
> I'm starting to think about code to drive the 4 GHz samplers.  In order 
> that the comments in my code bear some relation to what we eventually
> end up calling things, I'd like to talk about terminology now.
>
> My suggestion is that the first output from the T304s, be called
> basebands A, B, C, D, as they are now, ignoring the fact that they
> have different filters and samplers selected.
>
> Let's call the second outputs from the T304s basebands E, F, G, H.
>
> So the baseband pairs are AC, BD, EG, FH.
>
> Another alternative is to assign nunbers to the baseband pairs, a la
> AIPS, so the basebands become 1R, 1L, 2R, 2L, 3R, 3L, 4R, 4L.  (Which
> T304 baseband 2R comes from TBD.)  I think this is more confusing 
> because we seem to have settled on numbering the subbands, so subbands
> would be things like 101R, 101L, 102R, 201R, etc. which I find less
> euphonious than A01, C01, A02, B01, etc.
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