[evlatests] 3-bit setup recommendations

[Bryan Butler]

for everything else, we specify the overheads as percentages, not in the 
detailed way you have set out below (for number 2).

can you recommend a simple extra percentage, as baseline?  (10% might be 
OK?)

	-bryan


Rick Perley wrote, On 7/10/12 14:09 :
>      After some discussion with Ken and Vivek, the agreed overheads for
> setting up to observe with the 3-bit samplers are:
>
>      1) Three minutes at the beginning of any SB, to allow the antennas
> to slew to ~30 degrees, where the T304 attenuators will be set.  The
> argument here is that we have yet to establish the power range over
> which the attenuators should be reset (probably 1dB is too fine, and 2dB
> might be about right.  If so, then setting the levels at/near 30 degrees
> will suffice for nearly all bands and elevations).
>      2) Two more minutes for every LO tuning.  For most initial 3-bit
> observing (certainly for wide-band continuum, and wide-band spectral
> line searches), there should be only a single LO tuning per band.
>
>      We think this is sufficiently general, and cautious.
>
>      If there are counter-arguments, we need to hear them soon!
>
>      Rick
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