[evlatests] Ant. 13, IFs BD: ~60d phase jumps every 20 seconds at C, X, L bands

[Rick Perley]

    But why would this non-subtle behavior be absent before July 7th?  
And why only
with antenna 13, IFs B and D? 

Barry Clark wrote:

>This is almost certainly the heartbeat capture uncertaintly glitch we 
>saw in the lab.  I am happy that things are now working well enough in 
>the field that we notice it.  It could probably be cured by adding a foot 
>of cable to the LVDS heartbeat cable.  Only worth doing if this L302 is 
>in final form.
>
>I've lost track of what the revision state of this L302 is.  The vaunted
>spreadsheets in techdocs contain no useful information for L302s.
>
>
>  
>
>>AR603 data taken between July 12th and July 15th show an odd behavior
>>for ant. 13, IFs BD (AIPS IF 2 RR & LL): frequent ~60 degree phase jumps 
>>within a scan.
>>    
>>
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