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VME ST-201 Backplane Monitor

VME ST-201 Backplane Monitor



The ST-201 VME Backplane Monitor, powered by ITCN’s Real-Time Trace™ technology, is designed for use in VME 32 and VME 64 systems. The SystemTrace ST-201 is capable of monitoring and recording activity on all four backplane buses (Data Transfer Bus (DTB), Arbitration Bus, Interrupt Bus, and Utility Bus). This allows for analysis of data transfers between processors, or any other device that participates in data transfers and bus arbitration. Protocol interactions can be analyzed by specifying occurrences on the Arbitration, Utility and Interrupt Busses as “Events” for the SystemTrace VME to monitor and record. Any specific occurrence or group of occurrences on the bus may be recorded by setting up the SystemTrace VME to identify them as Events and selecting the Recording Action. Conditions for Event recording may be setup by the user, such as, number of Event occurrences, elapsed time, or a dependence on the occurrence of other Events. An Event may be designated as a Pre- or Post-triggering point for a recording. Activity on the Data Transfer Bus may be recorded as Address Range or Variable Events. Activity on the Utility, Interrupt, and Arbitration busses are recorded as Special Events. In addition to Event capture, a parallel circular History buffer with a 256K window may be enabled, allowing the SystemTrace VME to monitor and collect all activity from the time the target is powered up until the History buffer is triggered or the monitor is stopped. After the completion of monitoring sessions, the bus data collected may be uploaded and displayed on a PC for analysis and reporting.


  • Platform: VME Form Factor, SystemTrace Backplane Probe
  • Size: 6U, 4HP, VME Form Factor (Uses one 6U Card Slot, P1/P2 Connectors)
  • Supported Protocol: Meets ANSI/VITA 1-1994, VME64
  • User Event Filters: 256
  • Filter Criteria: Address, Cycle Type, Address Modifiers, Cycle status, Bus Error, Data Comparison
  • State Machine: 64 Levels + 1 continuous
  • External Event Triggers: 4 bi-directional, multi-drop, routed via TSL front connectors
  • Timer/ Counters: Two, configurable as timer or counter, used in state machine
  • Comparitors: Full data type comparison for Event qualification
  • Timestamp Resolution: 15 nsec
  • Time Sync PRT: 100 usec
  • Event Trace Buffer: 1,000,000 Records
  • Event History Buffer: 256,000 Records
  • Event Log Disk: 40 GBytes (Roughly 1.6 Billion Records) – User adjustable limits
  • Software Compatibility: Windows XP/2000
  • Supported Architectures: VME 32, VME 64
  • Data Types Supported: Bits, Unsigned Bitfields, Signed Magnitude Bitfields, signed, unsigned, floating point, double precision floating point, User Scale & Offset provided
  • Transfer Types Monitored: A64, A40, A32, A24, A16; D32, D16, D08 (EO); MBLT, M32, BLT
  • Network Interface: RJ-45, 10/100 Base-T
  • Performance Statistics Provided: Per second count of Bus Busy Time, Data Transfer Bus Busy Time, Bus Grants, Reads, Writes, Interrupts Acknowledged
  • Error Statistics Provided: Per second count of Read and Write Retries and Errors
  • Power Source: VME Backplane or External Connector
  • Power Consumption: 25W Measured, 40W Max

Multiple VME data streams can be monitored and tested simultaneously, in real-time.


  • Software Test & Evaluation
  • System Integration
  • Performance Monitoring
  • Operational Test (Land, Sea, Air)
  • Mission Monitoring
  • Diagnostics
  • Prognostics


  • Supports Entire Life-Cycle of System, Reducing Instrumentation Cost
  • Long-Term Collection Allows Capture of Infrequent Events
  • System-Wide View of Operations Correlated in Time Aids Analysis
  • Multiple Collection Scenarios Lower Session Costs
  • Collecting Only “Data of Interest” Increases Length of Observation Time and Decreases Analysis Time
  • RTNI Monitoring Gives Accurate Results
  • Scalable Architecture Supports Changing Requirements
  • Remote Monitoring of Targets Saves Time and Money
  • Open Data Interface Supports User Preferred Analysis Packages


  • Simultaneous RTNI Monitoring of up to 32 VME backplanes
  • Long-Term Data Acquisition & Storage
  • WINDOWS GUI for Set-Up and Analysis
  • Time-Correlated Data Collection
  • Easily Programmable Event (Capture) Filters
  • Filtered, Triggerable Event Trace Buffer
  • Long Term, Filtered Event Log Disk
  • Unfiltered, Triggerable Event History Buffer
  • Setup & Control via ETHERNET (10/100 Base T)
  • 4 Cross Module Triggers
  • 2 Timer/Counters
  • Run-Time Data Displays
  • Complex Triggers and Filters (64 Level State Machine)
  • Programmable Data Collection Scenarios
  • Multiple Scenarios per Session
  • Open Data Interface