[evlatests] ea28 focus
Doug Whiton
dwhiton at nrao.edu
Wed Jun 29 15:15:05 EDT 2011
Servo replaced the Focus resolver and reset the zero point to the middle
of travel. The change was about -673 octal counts. The focus settings
will need to be reset.
Doug
> ea28 was reported as not working well at the high frequency bands.
> This was found to be caused by a 1.5 cm change in focus zero point.
> I have changed the focus positions in the paramters database for
> K, Ka and Q bands and asked the operator to run a focus check
> before observing begins tonight.
>
> If the FRM is examined and modified the focus settings will have
> to be changed again.
>
--
Doug Whiton
National Radio Astronomy Observatory
Servo/MOS Group Leader
575-835-7417
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