PRODUCTION ENGINEERING MEASURE. CR-(XM-45)/U QUARTZ CRYSTAL UNITS (RUGGEDIZED, LOW FREQUENCY).
Abstract
The CR-(XM-45)/U crystals are ruggedized units in the 90-Kc to 200-Kc frequency range. The original requirements were that these units have much more stringent temperaturefrequency stability than the standard CR-42A units of specification MIL-C-3098, as well as have the ability to take 10-cps to 2,000-cps, 15-G vibration. It proved to be impossible to meet the original requirements; the ruggedized CR-(XM-45)/U units could not attain tighter temperature-frequency stability than the =0.002% demanded of the non-ruggedized CR-42A's. Investigation was made to determine realistic requirements which could be met by units which were able to meet the new vibration requirement. It was found that the rugged units could be made to meet the same performance levels as the non-rugged (CR-42A/U) units, provided an additional 3.5-pf capacitance were permitted and a maximum resistance value of 7,500 ohms were allowed. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1963
- Accession Number
- AD0601920
Entities
People
- A. R. Krespan
- J. M. Wolfskill
- Robert Mouck