VT1433B User's Guide

Using the VT1433B

Multiple-module/mainframe Measurements

Grouping of Channels/Modules

The interface library for the VT1433B is designed to allow programming of several channels from one or several distinct modules, as if they were one entity. Each VT1433B module has up to eight channels. The library may control up to a maximum of 255 VT1433B modules (8160 channels).

The function hpe1432_createChannelGroup can be used to declare any number of groups of channels, possibly overlapping. Each group can be uniquely identified by a group ID.

The ‘target’ of a library function is either a channel, a group or (rarely) a module, depending on the nature of the call. When the same library function may be called with either a channel or a group identifier, its ‘target’ is shown by a parameter named ID.

Multiple-module Measurements

A channel group that spans more than one module will need to be configured to use the TTL trigger lines on the VXI Bus for inter-module communications. This configuration is automatically performed in the hpe1432_initMeasure call unless defeated using hpe1432_setAutoGroupMeas.

The following discussion outlines what hpe1432_initMeasure does automatically. This must be done by the user if hpe1432_setAutoGroupMeas has been used to defeat auto configuration.

There are eight VXI TTL trigger lines that can be used for multi-module synchronization. Often, these lines are used in pairs, one for sample clock and one for Sync/Trigger. The hpe1432_setTtltrgLines function selects which TTL trigger lines to use; this function always uses the TTL trigger lines in pairs. Calling hpe1432_setClockSource with the group ID will set all modules to the same pair.

All modules need to be set to use the shared sync line rather than the default setting of internal sync. This can be done with the hpe1432_setMultiSync function, using the group ID.

One module of the set of modules needs to be set to output the sync pulse. The module with the lowest VXI logical address is called the “system module” and is assigned this duty. This can be set with the hpe1432_setMultiSync function call, using the lowest channel ID in the group (NOT the group ID).

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VXI VT1433B manual Multiple-module/mainframe Measurements, Grouping of Channels/Modules, Multiple-module Measurements
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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.
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