[evlatests] More Missing Scans

[Bryan Butler]

but XLo->XHi doesn't involve a reconfiguration, so that wouldn't explain 
anything missing in XHi...

i'm assuming the first L-band scan had valid data?  if not, the array 
could have still been slewing to source...

	-bryan


Rick Perley wrote, On 3/9/11 08:16 AM:
>      The first 'receiver rotation' observation (pre-rotation) was made
> yesterday evening.  There are 12 different tunings involved, each
> including a strong source (3C147 to measure cross-polarization) and
> nearby noise field (to measure sensitivity).  The order of observing was:
>
>      L ->  XLo ->  XHi ->  CLo ->  CHi ->  S
>
>      with this cycle repeated twice.
>
> Each runing, except L-band, is an 'extended OSRO' style mode with 1 GHz
> bandwidth, and the two IF pairs split to cover adjacent 1 GHz 'chunks'.
> At L-band, the subbandwidths are reduced to 64 MHz, so the two IF pairs
> cover the lower and upper halves of the 1 GHz bandwidth.
>
>      I should have gotten two observations (each with two sources) at
> each tuning.    But for both X-band tunings, I got only one.  The first
> time around resulted in no data in the archive.  Fortunately, for this
> experiment, the second cycle did provide data.
>
>      The conversion from L to X involves a correlator reconfiguration,
> right?  Are we seeing this old problem again, or is something else
> happening?
>
>
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