VT1433B User's Guide

Module Description

The VT1433B VXI Device

Address Space

The VXI system architecture defines two types of address space. A16 space consists of 64 kBytes and A24 consists of 16 MBytes.

The VT1433B has a 32-bit port through which it has access to the A16 and A24 space. It can also use D32 to send and receive data though the port. Or it can use the port for 16-bit data transfers by using only 16 of the 32 bits available.

The VT1433B performs a different type of VME cycle depending on the number of bits transferred per cycle (two cycles for 16-bit transfers and one cycle for 32-bit).

Shared Memory

Shared memory provides a way for the VT1433B to transfer data to a controller. The shared memory in the VT1433B is mapped to the A24 VXI address space. The controller can then access that same address space to receive or write data. A function can be called to retrieve the data. See the chapter on “The Host Interface Library.”

Memory Map

The following discussion of memory mapping is included as supplemental information. It is not needed to operate the VT1433B because this functionality is hidden when using the VT1432A Host Interface Library software.

Refer to the VT1433B block diagram (Figure 5-1). The VXI interface maps some of the VT1433B’s B-bus internal memory space so that it is visible to the VXI Bus. The port connecting the A and B busses also allows the VXI Bus access to the SRAM, DRAM and inputs which are on the A bus. (SRAM stands for Static RAM; DRAM is Dynamic RAM.)

The VXI interface has two “windows” on the B bus memory space. Each is 512 kbytes, which is 128 32-bit words. One of the windows is fixed and the other is movable. The movable window allows the VXI Bus access to many different parts of the memory space. The fixed window contains:

￿The A16 registers

￿The B-bus SRAM

￿The hardware registers

￿The FIFO (which is in DRAM)

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VXI manual VT1433B VXI Device, Address Space, Shared Memory, Memory Map
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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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