VT1433B User's Guide

The Host Interface Library

Upon entering the ARM state the VT1433B starts saving new data in its FIFO. It remains in the ARM state until the Sync/Trigger line goes high. If the VT1433B is programmed with a pre-trigger delay, it collects enough data samples to satisfy this pre-trigger delay and then releases the Sync/Trigger line. If no pre-trigger delay has been programmed, it releases the Sync/Trigger line immediately. When all modules in a system have released the Sync/Trigger line (allowing it to go high), a transition to the TRIGGER state occurs.

Upon entering the TRIGGER state the VT1433B continues to collect data into the FIFO, discarding any data prior to the pre-trigger delay. The VT1433B remains in the TRIGGER state until it sees a high-to-low transition of the Sync/Trigger line. The Sync/Trigger line is pulled low by any VT1433B which encounters a trigger condition and is programmed to pull the Sync/Trigger line. If any VT1433B is programmed for auto triggering (with e1432_set_auto_trigger), the Sync/Trigger line is pulled low immediately. The Sync/Trigger line may also be pulled low by an explicit call to the function e1432_trigger_measure.

Upon entering the MEASURE state the VT1433B continues to collect data. The VT1433B also presents the first data from the FIFO to the selected output port, making it available to the controller to read. The VT1433B holds the Sync/Trigger line low as long as it is actively collecting data. In overlap block mode the VT1433B stops taking data as soon as a block of data has been collected, including any programmed pre- or post-trigger delays. (It starts again when another trigger occurs). In continuous mode, the VT1433B stops taking data only when the FIFO overflows. When data collection stops, the VT1433B releases the Sync/Trigger line. When all VT1433Bs are finished and the Sync/Trigger line goes high, the VT1433B goes into the IDLE state again.

The measurement initialization and loop may be interrupted at any time with a call to e1432_reset_measure, which puts the module in the TESTED state.

Register-based VXI Devices

The VT1433B is a register-based VXI device. Unlike message-based devices which use higher-level programming using ASCII characters, register-based devices are programmed at a very low level using binary information. The greatest advantage of this is speed. Register-based devices communicate at the level of direct hardware manipulation and this can lead to much greater system throughput.

It is not necessary to access the registers to use the VT1433B. The VT1433B’s functions can be more easily accessed using the VT1432A Host Interface Library software. However, if information about the registers is provided see Appendix A: Register Definitions for reference.

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VXI VT1433B manual Register-based VXI Devices
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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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