VT1433B User's Guide

The Host Interface Library

Channel and Group IDs

Most functions in the VT1432A C-Language Host Interface Library take an ID parameter which specifies what channel or group of channels the function should apply to. The ID can either be a channel ID or a group ID. If a group ID is used, then the function is applied to each channel contained in the group.

Channel IDs

Channel IDs are logical IDs which are created by a call to

e1432_assign_channel_numbers. The e1432_assign_channel_numbers function must be called exactly once, following the call to e1432_init_io_driver, in order to declare to the library the logical addresses of the VT1433B modules that will be used.

This function checks the existence of a VT1433B module at each of the logical addresses given in a list of logical addresses and allocates logical channel identifiers for each channel in all of the VT1433Bs. Input channels, source channels and tach/trigger channels are kept logically separated. Channel numbers for each type of channel are numbered starting from one, so there will be input channels 1 through M, source channels 1 through N and tach/trigger channels 1 through P, where M is the number of input channels, N is the number of source channels and P is the number of tach/trigger channels.

As an example, suppose two logical addresses 100 and 101 are passed to the function and the logical address 100 has two 4-channel input SCAs and a

2-channel tach/trigger board, while logical address 101 has three 4-channel input SCAs and a 1-channel source board. In this case, input channel IDs 1 through 8 are assigned to the eight input channels at logical address 100, while input channel IDs 9 through 20 are assigned to the twelve input channels at logical address 101. Tach/trigger channel IDs number 1 and 2 are assigned to the two tach/trigger channels at logical address 100 and Source channel ID number 1 is assigned to the source channel at logical address 101.

To use the ID of an input channel, the input channel number is given as an argument to the E1432_INPUT_CHAN() macro. (For backwards compatibility with the Agilent/HP E1431A, the macro does nothing.) To use the ID of a source channel, the source channel number is given as an argument to the E1432_SOURCE_CHAN() macro. To use the ID of a tach/trigger channel, the tach/trigger channel number is given as an argument to the

E1432_TACH_CHAN() macro. A channel ID is always positive.

For example, to set the range of the third input channel to 10 volts, the source code would look something like:

status = e1432_set_range(hwid, E1432_INPUT_CHAN(3), 10.0);

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VXI VT1433B manual Channel and Group IDs

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.