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Vibration Test of a 52-85713-339 Tape Recorder. Volume II.
MCDONNELL CO ST LOUIS MO
Pagination or Media Count:
The tape recorder operated mechanically throughout all tests of Revision A of the test request. The peak-to-peak jitter was 20 or higher during all tests. The Department 289 ground station was able to obtain good sync. only for the X-axis shock mounted test. Several signal improvement techniques were attempted both at the Department 289 ground station and at the GSO ground station. There was minor improvement at the Department 289 station and partial improvement at the GSO station. The GSO station improvement was large enough to have permitted manual data reduction had this been a mission tape. Paragraphs 1 thru 4 summarize the results of the test which was run per Revision A of the test request. Retest per Revision B of the test request was completed without mechanical failure. Jitter measured on data recorded during vibration periods was improved by a minimum of 25 over jitter measured in similar periods of the test run per Revision A of the test request. Data reduction however, was only slightly improved over that of Revision A data. The retest is summarized. Author
APPROVED FOR PUBLIC RELEASE