[evlatests] ea02-l302-2

[Keith Morris]

The state of that monitor point is no different before or after the 
module was replaced.  It read Logic 1 at all times.  I will look into 
the hardware involved.



On 10/3/2013 1:29 PM, Ken Sowinski wrote:
> On Thu, 3 Oct 2013, Vivek Dhawan wrote:
>
>>
>> p.s. it seems to me the the lack of 20Hz should be on the list of alarm /
>> alert conditions?
>
> It looks to me like there is an alert:
>
> SHELL:\>get l302.heartbeat.*
>
> <?xml version="1.0" encoding="ISO-8859-1"?>
> <EVLAMessage location='ea01-l302-1' timestamp='56568.8098551' >
>     <device name='L302'>
>       <monitor name='HEARTBEAT' type='digital' value='1' alert_arm='1'
> alert_on1='1' alert='0' a_period='600' s_period='0' o_period='0'
> aa_period='50' msg='' />
>     </device>
> </EVLAMessage>
>
> What is the documented action if the alert is raised?
> and, is the monitor point actually hooked to anything?
>
>
>
>> On 10/03/2013 01:17 PM, Vivek Dhawan wrote:
>>>
>>> Dennis Polyard checked the L302 on the bench, and saw nothing wrong
>>> except the 20Hz synch signal was not getting into the module. This
>>> would result in the phase being set at an incorrect time, so it
>>> explains the symptoms we saw, i.e. correct frequency but random
>>> phase every time it reset.
>>>
>>> He has fixed the module and returned it to the array in ea10 L302-2.
>>> Antenna 10 shows no phase problems. Antenna 2 continues to behave
>>> well - so the issue is resolved.
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-- 
Keith Morris
National Radio Astronomy Observatory
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