VT1433B User's Guide

The Host Interface Library

Synchronization in Multiple-mainframe Measurements

A TTL Trigger line between VT1433Bs making group measurements keeps all modules synchronized. This is an open-collector line where each module holds the one designated as the SYNC line low until the module is ready to advance to the next measurement state. Another TTL Trigger line is designated to carry the sample clock to all modules. This shared sample clock may come from any VT1433B module in Mainframe A or from an external signal routed through the Slot 0 Commander in Mainframe A.

One module is responsible for pulling the SYNC line low to start each group’s state transition. Then, each module holds the line low until it is ready. When all modules are ready, the SYNC line drifts high. The unidirectional line prevents modules in Mainframe B from holding-off modules in Mainframe A.

The lowest logical address must be in Mainframe A because of VXI-MXI and Resource Manager (RM) constraints. Group constraints with the C-Library force modules in Mainframe A to have their FIFOs emptied last. The C-Library reads data in channel order, so the highest channel is read last. To get this to work automatically, the call to e1432_assign_channels() must list the logical addresses in descending order.

Channel triggering must be done only by modules in Mainframe A. A trigger in any other mainframe would not be communicated back on the SYNC line to Mainframe A. The C-Library itself selects the VT1433B with the highest channel number for synchronization.

VXI-MXI Module Setup and System Configuration

To set up a multiple mainframe system, follow the “Hardware Installation Rules” which appear in Chapter 2 of the Agilent/HP E1482B VXI-MXI Bus Extender User’s Manual. This allows the Resource Manager to configure the system.

The VXI-MXI Module setup in Mainframe A needs to be changed from those set by the factory. The VXI-MXI module is not the Slot 0 Controller for Mainframe A. See Table 2-1. Configuration Settings in the Agilent/HP E1482B VXI-MXI Bus Extender User’s Manual. This requires changing several switch settings.

￿Set the module as not being the Slot 0 Controller.

￿Set the VME timeout to 200 µs.

￿Set the VME BTO chain position to 1 extender, non-slot0.

￿Do not source CLK10.

￿Set the proper logical address.

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VXI VT1433B manual Synchronization in Multiple-mainframe Measurements

VT1433B specifications

The VXI VT1433B is a versatile and sophisticated instrument designed for testing and measurement applications, particularly in the realm of telecommunications and electronics. Designed with the needs of engineers in mind, it brings a comprehensive set of features and technologies that enable accurate and efficient performance.

One of the standout features of the VT1433B is its ability to function as a high-performance data acquisition system. With up to 32 input channels, users can capture a wide range of signals simultaneously. This capability is particularly beneficial for applications requiring the monitoring of multiple parameters or systems concurrently, such as in complex electronic testing scenarios.

The VT1433B utilizes advanced technology for signal processing and analysis. Equipped with high-resolution analog-to-digital converters, the unit ensures precise measurement of various signal types, including voltage, current, and frequency. This precision is critical for engineers who rely on accurate data to make informed decisions during the design and testing phases.

In addition to its measurement capabilities, the VT1433B also supports multiple communication protocols, including GPIB, USB, and LAN, allowing for easy integration into existing test systems. This flexibility enhances its usability in both laboratory settings and field operations, where different setups may be required.

The instrument also comes with a user-friendly interface, featuring a clear display and intuitive controls that simplify operation. This design consideration allows users, regardless of their experience level, to navigate the system seamlessly and access the features they need without unnecessary delays.

Moreover, the VT1433B incorporates robust software support, including various programming tools and libraries. This aspect allows for easy implementation of automated test sequences and extensive data analysis capabilities, streamlining the workflow significantly.

Another notable characteristic of the VT1433B is its reliability and durability, designed to withstand the rigors of continuous use in demanding environments. It is engineered to operate under a broad range of temperatures and conditions, making it suitable for diverse applications, from laboratory research to field testing.

In summary, the VXI VT1433B stands out as a comprehensive testing solution, characterized by its extensive input channels, high precision measurement capabilities, multi-protocol communication, user-friendly interface, and robust software support. This combination of features and technologies makes it an invaluable tool for engineers and researchers looking to optimize their testing and data acquisition processes in various fields.