[evlatests] ea19 switched power at L-band

Eric Chavez echavez at nrao.edu
Tue Jan 29 17:54:54 EST 2013


Rick,

Bob Stupak and myself were reviewing the stress test forms. This is a 
known Receiver problem, and is on a  long term mainsaver form. This 
L-band receiver has problems on both RCP and LCP.

Thank you,

Eric


Rick Perley wrote:
>     A 6-hour run at L-band was done Saturday evening. 
>     Antenna 19 is not performing well at L-band.  The visibility 
> amplitudes are low, and the switched power is both low in amplitude and 
> quite unsteady on short (second) timescales.  The variations in PDif are 
> over a factor of two. 
> 
>     I understand that the lack of fringes in ea04 in RCP is known and 
> corrected. 
> 
>    
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