VT1433B User's Guide

Using the VT1433B

Channels and groups

This section gives some information about using channels and groups. For more detailed information see the VT1433B help text.

Channel Groups

In the VT1433B VXIplug&play driver, a channel group is the basic unit of hardware control. To control any channel, it must first be assigned to a group with the hpe1432_createChannelGroup function. In addition to creating the group, this function returns a “handle” that uniquely identifies the group. This handle can then be used to direct functions to all channels in the group.

When a channel group is created, all input and tach channels in the group are automatically activated and all source channels are inactivated. But when deleted, input and tach channels are not automatically inactivated. Any input or tach channel that remains active after its group is deleted will continue to supply data to its module’s FIFO buffer during a measurement — consuming module resources. For this reason, the channels in group should always be explicitly inactivated before deleting them. Channels can be inactivated with hpe1432_setActive. Channel groups can be deleted with hpe1432_deleteChannelGroup and hpe1432_deleteAllChanGroups.

Also when creating a channel group, channels which are not mentioned in the new group are not turned off. Any channels that are not to be active must be explicitly inactivated. (An exception is a power-up when only the channels in the initial channel group are active.)

Initialization

The command used to initialize the system is hpe1432_init. This function initializes the VXIplug&play library and registers all VT1433B modules. It also checks the existence of a VT1432A module at each of the logical addresses given in the resource list and allocates logical channel identifiers for each channel in all of the VT1432As. Input channels, source channels and tach/trigger channels are kept logically separated.

Most other functions cannot be used until after hpe1432_init, but there are two functions which can be used before initialization to get information needed by hpe1432_init. These are hpe1432_find and hpe1432_getHWConfig. hpe1432_find searches the VXI mainframe and returns the VXI Logical Address for every VT1433B found. hpe1432_getHWConfig returns additional information about the hardware.

After hpe1432_init is run, use hpe1432_getNumChans to get the total count of inputs, sources and tachometers for all VT1433B modules named in the hpe1432_init call.

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VXI VT1433B manual Channels and groups, Channel Groups, Initialization

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.