STEP PQM
(1) The qualification EMC tests were performed successful from 29th to june 15th of july 2015.
The E-field characterization was performed from 28th to 29th ofJuly 2015 with adequate noise
floor acquired by the test facility.
(2) Thermal balance tests were performed from 10th to 21th of August 2015
3) STEP and EPT-HET have very similar design for their electronic boards in terms of the mass and the dimension. Based on the lessons learned from the failure in the EPT-HET PQM vibration tests, two strategies were applied for the STEP PQM vibration tests:
(a) Notching the RV profile in the susceptible frequencies.
(b) Increasing the stiffness of the boards by using separate structural stiffeners.
The vibration tests performed from 30th of September to 2nd of October 2015.The post-vibration functional test was successful, but due to the slippage, there was a shift more than 20% in the accelerometer responses.
(4) Thermal cycling tests were performed from 12th to 22th october 2015.
