[evlatests] Antenna 16 acceptance test

[Steven Durand]

Enclosed is the simplified results of the Sept 30 Ant-16 
Acceptance_Tests and a link to the report on filehost.

Antenna 16 failed the acceptance test due to the following:

1.	The T304/T305 hardware was not communicating with the Monitor and 
Control Software when the team arrived on site on the morning of 
September 30, 2005.  All MIBs in the entire antenna were reported to be 
communicating the preceding afternoon.  The power to the module was 
cycled, initializing the module, before tests could be started.  Because 
the modules required a hardware reset to run the acceptance test, the 
antenna failed.

2.	After the antenna was communicating, the VLA operator ran an X-Band 
pointing program with the ACU in E-stop then the test team performed the 
X-Band acceptance tests.  When we reached the Round Trip Phase test, the 
operator was asked to stop the pointing script.  The test team attempted 
to move the antenna 15 degrees.  The antenna could not be controlled by 
the test team.  The operator confirmed that NO script was running. 
After many phone calls and down loading of software, the hidden script 
stopped running.  The operator could not tell the difference.  The Round 
Trip Phase test was performed as the stability of the cable warp was 
monitored and the antenna passed the test.  Because neither the test 
team nor the operator was able to determine the state of the antenna 
during the test, the antenna failed the test.

3.	Next, the test team attempted to run the L-Band tests.  No one on the 
test team or the VLA operator knew how to configure the antenna to the 
default L-Band configuration thus the L-Band tests could not be 
performed and the antenna failed the acceptance test.


\\Filehost\evla\techdocs\sysintegrt\Antenna_Acceptance_Tests\ant16_AcceptTestResults_2005-09-30.doc




Steven Durand, MTS               National Radio Astronomy Observatory
Electronics Division             1003 Lopezville Road
505.835.7103                     Socorro, New Mexico  87801