[evlatests] EA01, C band, IF A shows periodic amplitude drops

[Claire Chandler]

This may be related to a problem on antenna 1 reported by Bob Becker from 
several weeks ago that Vivek is investigating.

On Fri, 12 Jun 2009, Michael Rupen wrote:

>
> Two test runs yesterday morning (Thursday 11jun09) at C band showed
> odd amplitude behavior for antenna ea01, IF A: periodic amplitude drops,
> with a drop of a few per cent lasting for ~30 seconds every two minutes.
>
> The first run was a spectral line observation (25 MHz per IF, mode 4
> --> 7 channels per IF after dropping the first channel); the second was
> the standard continuum setup (50 MHz per IF).
>
> Ken tells me he suspects the sampler.
>
>          -- Michael
>
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