[evlatests] ea02-l302-2
Ken Sowinski
ksowinsk at nrao.edu
Thu Oct 3 15:29:06 EDT 2013
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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