[evlatests] Phase stability of ea27 {External}

Rick Perley rperley at nrao.edu
Fri Jun 30 13:48:48 EDT 2023


Some support for a ratty connector:  In looking at my gain solutions, I 
see that ea27 often has both ratty (variable) amplitudes and phases 
within a scan.  No other antenna does this ...

On 6/30/23 11:44, Ken Sowinski wrote:
> On Fri, 30 Jun 2023, Rob Long via evlatests wrote:
>
>> If we have a loose connection between the L300 and LO or DTS 
>> splitters, something like this could occur. Do we see this effect in 
>> both 8-bit and 3-bit?
>
> I think Rob has the right idea.  Given the pervasiveness it must be
> at the head of the LO chain (L300 to L305) or the LO transmitter; or
> The L302(s) not being phase stable with LO offsets.
>
> Tha latter can be ruled out by running a test with the Widar offset set
> to zero.
>
> Ken



More information about the evlatests mailing list