[evlatests] Frequency-dependent sensitivity at C and L bands

Ken Sowinski ksowinsk at nrao.edu
Mon Jun 26 17:07:39 EDT 2006


On Mon, 26 Jun 2006, Rick Perley wrote:

>    Might we be seeing something related to the LSC converter?  But -- the
> L301 which drives this module doesn't change when we interchange
> AC and BD frequencies.  So how could the LSC converter know when we
> do this?

when tuning to the default VLA frequencies, the same L301
is used for AC and BD at L band, however they are different
at C band.  For C band:
L301-AC  14976
L301-BD  14720


>    I will run a short test tonight, at C-band, interchanging the AC and BD
> default frequencies (4885 and 4835 MHz) in a manner similar to that done at
> L-band last Friday.




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