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SCRAMNet GT Shared Memory Series
SCRAMNet GT Features:
- 210+ MB/sec data throughput for large data transfers
- Sub-microsecond latency ensures on-time performance
- Memory options starting at 128 MB for robust host platforms
- Optional second transceiver provides fault-tolerant capability
Introduction
For nearly two decades, SCRAMNet Network products have provided an ideal data communications solution for simulation, virtual reality and other real-time applications with critical performance requirements. Based upon a replicated shared-memory (reflective memory) concept, SCRAMNet Network products are optimized for the high-speed, ultra-low-latency transfer of data among many computing platforms that are all solving portions of the same real-time problem. Their simplicity and speed are ideally suited for applications requiring a high degree of synchronization and control.
Now you can experience SCRAMNet GT, the next generation in real-time control and data networking systems. SCRAMNet GT provides the same pinpoint accuracy as previous generations of SCRAMNet products, but with more memory and bandwidth to handle your most demanding data throughput requirements. With SCRAMNet GT control and data networks combine into a single, high-speed, low-latency data link with industry leading features; shared memory starting at 128 MB, data transfers at 2.5 Gbit per second, and data throughputs exceeding 210 MB per second. SCRAMNet GT is able to handle network control functions and network data streams simultaneously, thereby eliminating the need for multiple networks in the same real-time system. SCRAMNet GT was designed to operate at 2.5 Gbit per second using industry standard Small Form Factor Pluggable (SFP) transceivers.
SCRAMNet GT dual-port memory appears on the host bus as additional host memory. The host reads and writes data through one port while the network writes data to memory through a second port. Data written to memory by the host is automatically transmitted by the hardware to all nodes on the network. Insertion and transmit/receive FIFOs buffer the data flow to avoid the data collisions often encountered in standard networks.
The SCRAMNet GT Network's ring topology can be expanded up to 256 nodes to create a powerful multi-processor computing system, with complete host-processor and operating system independence at each node.
Operating System Support
A number of operating systems are supported by SCRAMNet GT including: Windows®, Linux, VxWorks®, IRIX®, Solaris®, LabView®, MatLab®, and RTX®.
Fault Tolerant Shared-Memory
SCRAMNet GT uses the proven, low error rate physical layer used by Fibre Channel and other high speed networks with bit error rates of less that 10-12. SCRAMNet GT further protects against undetected errors by protecting the data with a cyclic redundant code (CRC) that again has been field proven with its use on Fibre Channel. To protect against connectors failing or fibers breaking and disrupting the network, the GT board can be purchased with an optional second transceiver. Only one transceiver is used at a time, but with proper cabling the network will continue to operate without the use of external bypass switches. For more elaborate network protection and to support network reconfiguration a LinkXchange® non-blocking, circuit switch can be installed into the network.
Applications
SCRAMNet GT is ideally suited for applications with critical control loop timing requirements, such as simulation systems. Each SCRAMNet GT node provides the high-speed transfer of data between the control and feedback systems that may be running on many dissimilar computers in the system. Typical simulation systems include:
> Aircraft simulators
> Missile simulators
> Video Information Distribution
> Power generation plant simulators
> Ship simulators
> Land vehicle simulators
> Mission planning simulators
> Force-level training simulators
> Virtual reality systems
> Location-based entertainment systems
The tight control-feedback loops required by many instrumentation and control systems demand the low-latency performance of SCRAMNet GT for accurate, real-time data acquisition and control. SCRAMNet GT provides the nearly-instantaneous availability of critical data that enables system evaluation and adjustment in real-time. Typical instrumentation and control applications include:
> Range and telemetry systems
> Flight test
> Wind tunnels
> Engine test stands
> Robotics
> Particle accelerators
> Industrial process control
While precise and deterministic control is critical in real-time systems, many applications generate large amounts of data which must be shared and processed without compromising system performance. SCRAMNet GT maintains tight control while transferring large amounts of streaming data, all on the same high-speed fiber. Applications with these demanding data requirements include:
> High-fidelity video simulations
> Data streaming sensor systems
> Multi-sensor data acquisition systems
> Distributed sensor-to-processor systems
> High-speed video inspection
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