[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




More information about the evlatests mailing list