Specification • A very useful option for plug-in modules is the ANSI/VITA 57 standard FPGA Mezzanine Card or FMC. This standard specifies an industry standard form factor utilizing a low profile, high-speed, high-pin count connector. The FMC connector can support very high bandwidths. The FMC approach solves the problem of how to...
Search
Microprocessor
Profile • The CH Node is a microprocessor-based node that executes software stored in supplemental on-board memory. It is highly recommended that this microprocessor be radiation-hardened for reliability. The processor is typically attached to a non-volatile memory technology and a faster SRAM or SDRAM memory. A bus interface between the microprocessor and...
Mission Data Processing
Profile • This application employs the CH node as a mission data processor, utilizing the radiation-hardened microprocessor and on-board memories to perform computations in support of the payload’s mission. Additional optional memories or other board capabilities may be built onto the expansion port if desired. Mission Data Processing Instantiation This application is...
Molecular Contamination
Specification • For all components that will be in the vicinity of an optical payload and anywhere that contamination at the molecular level is an issue, all parts and materials must comply with ASTM E 595 for less than 1% Total Mass Loss (TML) and 0.1% CVCM. Thermal bake-out of all components...
Molecular Thermovac Testing
Specification • Thermovac temperature testing is required to determine dissipation at full power modes. A test plan needs to be developed and coordinated with the System Engineer.
Mounting Distortion Impact
Specification • The JAS mechanical structure shall maintain the electronics/PCBs listed below within given positions with distortions less than expected for the intended application.
Multicast/Broadcast
Profile • SpaceWire doesn’t inherently support a multicast or broadcast capability. There is a time-code distribution function but it is limited in the amount of user information that can be distributed. An approach has been developed for a broadcast capability through custom router and endpoint modifications. It uses a set of dedicated...
Multiplexed Logical Channels
Specification • The protocol shall support multiple simultaneous logical connections over a single SpaceWire link.
Network Discovery
Profile • When probing for routing switches, early network discovery techniques typically relied on each routing switch’s configuration port to respond to identification requests to confirm the routing switch’s presence. A request packet was typically dispatched to the configuration port, and a response packet provided confirmation of existence. This same request/response approach...
Network Interfaces
Profile • All JAS nodes communicate through a standard set of interfaces that adhere to standard protocols. Refer to the Electrical Specification for physical layer technical information and Communication Specification for details on standard data protocols. This section describes two classes of network interfaces, megabit interfaces with line speeds below one gigabit...
Results 141–150 of 263