Tektronix / CDS VX4521 Advanced Resource Manager

The Tektronix VX4521 Advanced Resource Manager is a VXI C-size Slot 0 module that serves as the VMEbus system controller and VXIbus Resource Manager for complex automated test systems. Installed in the primary slot of a VXIbus mainframe, it initializes the system, identifies all VXIbus devices, builds configuration tables, and manages commander/servant hierarchies. The module provides the 10 MHz differential ECL clock driver for the backplane, functions as a VMEbus arbiter and interrupt daisy chain driver, and interfaces with station computers via IEEE-488 GPIB. It supports VXIbus Specification Version 1.3 while maintaining backward compatibility with Version 1.2 devices.

– Technical Specifications

• VXIbus Conformance: Version 1.3; compatible with Version 1.2 and 1.3 devices
• Module Type: VXI C-size, Slot 0 device
• System Clock: 10 MHz differential ECL clock driver for backplane
• VMEbus Functions: Bus arbiter, interrupt daisy chain driver, bus time-out function, system clock driver, VMEbus master
• Power Supply: +5 V DC (4.75 V to 5.25 V DC operating range); all power supplied by mainframe
• Dimensions: 262 mm H × 352 mm D × 31 mm W
• Weight: 1 kg

– Key Features

• Automatic system initialization and device discovery on power-up or reset
• Configuration table generation with device status, self-test results, slot location, manufacturer ID, and model code
• Address map configuration and system hierarchy setup at logical address 0
• IEEE-488.2 Talker/Listener interface
• MODID line transceivers for device identification
• Support for Word Serial Protocol, Fast Handshake, and VME Read & Write communications

– Typical Applications

Aerospace, defense, and telecommunications automated test systems requiring coordinated VXIbus instrument control and resource management.

– Compatibility & Integration

Designed for Slot 0 installation in VXIbus mainframes such as the Tektronix VX1400 C-size chassis. Functions transparently as VMEbus System Controller, eliminating user-level bus management overhead.