AXTAL: “Space-COTS Crystals” (SCC)
- Posted by Manuel Padial Pérez
- On June 25, 2021
- 2
For New Space applications AXTAL offers as special service the sourcing and/or up-screening of commercial quartz crystal units with proven quality level to so-called “Space-COTS Crystals” (SCC) increasing the range of available package styles
Sourcing can be
- From “CROVEN CRYSTALS“ in Canada (the one who supplies the crystals used in the EPPL listed AXTAL OCXO AXIOM6060) with long Space heritage
- From a manufacturer with automotive certification (ISO16959)
- From a manufacturer with aerospace certification (ISO/AS9100)
- From a manufacturer with heritage for crystals for MIL applications, and with established statistical process control (SPC) and traceability
Up-Screening can be performed at different levels:
- Screening according to MIL-PRF-3098 Level “S” or Level “B”
- Screening to a relaxed level “X”, introduced and used by AXTAL for several space customers, see the following table
Screening (MIL-PRF3098K)
| wdt_ID | Test Inspection | Level S | Level B | Level X* |
|---|---|---|---|---|
| 1 | Pre-seal visual examination | 4.10.2.2 | 4.10.2.2 | 4.10.2.2 |
| 4 | PIND | 4.10.16 | N/A | N/A |
| 7 | Thermal frequency repeatability | 4.10.15, 10 cycles | N/A | N/A |
| 10 | Frequency and resistance | 4.10.6 (@ Tief) | 4.10.18 | 4.10.6 (@ Tief) |
| 13 | Unwanted Modes | 4.9.10 | N/A | 4.9.10 |
| 16 | Shunt capacitance | 4.10.7.1 | N/A | 4.10.7.1 |
| 19 | Motional capacitance | 4.10.7.2 | N/A | 4.10.7.2 |
| 22 | Quality factor | 4.10.8 | N/A | 4.10.8 |
| 25 | Aging | 4.10.27, 3, 30 days@85ºC, |Af/f| | N/A | N/A |
| 28 | Drive sensitivity (DLD) | 4.10.11 |Af/f| | N/A | 4.10.11 |Af/f| |
*AXTAL procedure
Lead the Technical Content Maintenance Team of doEEEt platform. at Alter Technology
Manuel Padial has a Degree in Industrial Electronic. Engineering and a Master (M.Eng.)/Advanced Degree in Electrical and Electronic Engineering.
Since 2000 in Alter Technology, as EEE Parts Engineer, first in the Engineering and Materials Management Department, has given technical support to customers in many different space programmes. And later on, as Coordinator of the Parts Engineering and Purchasing Department, has been in charge of guarantee the proper EEE Parts selection/definition/testing to ensure the technical/schedule/budget compliance to projects requirements. Currently and since 2017 is leading the Technical Content Maintenance Team of doEEEt platform.
With the continuous maintenance of the platform technical content, doEEEt provides to the space community the most updated and complete information about Hi-Rel EEE components, related documentation, and reports, as well as any associated procurement and testing activities.
Since 2000 in Alter Technology, as EEE Parts Engineer, first in the Engineering and Materials Management Department, has given technical support to customers in many different space programmes. And later on, as Coordinator of the Parts Engineering and Purchasing Department, has been in charge of guarantee the proper EEE Parts selection/definition/testing to ensure the technical/schedule/budget compliance to projects requirements. Currently and since 2017 is leading the Technical Content Maintenance Team of doEEEt platform.
With the continuous maintenance of the platform technical content, doEEEt provides to the space community the most updated and complete information about Hi-Rel EEE components, related documentation, and reports, as well as any associated procurement and testing activities.
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