[evlatests] Front end filter problem

Ken Sowinski ksowinsk at nrao.edu
Mon Oct 1 17:15:53 EDT 2007


On Mon, 1 Oct 2007, Walter Brisken wrote:
>
> Today project AO215 had all VLA antennas flagged because of out of range
> "IF [ABCD] Total Power".  The problem was worked-around by changing the
> front end filter from 12.5 MHz to 50 MHz.  25 MHz also failed.  Barry says
> the wrong L6 frequency is being chosen.  Reliable data started at
> about 1630 UT.  Prior to this, only EVLA antennas were providing good
> data.  This might be something that Ken should look at???

The usual questions, what band and frequency?  Can you send me,
or point me to, the .obs or .evla file?

Ken




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