* Question
Briefly describe the concept and classification of GPIB system devices
* Answer
Concept of GPIB System Devices
GPIB (General Purpose Interface Bus), also known as IEEE-488, is a standard digital interface used to connect and control multiple instruments (like oscilloscopes, signal generators, multimeters) from a computer or controller. It allows for multi-device communication in test and measurement setups, enabling centralized control, data acquisition, and automation.
Key features include:
Parallel 8-bit communication
Handshaking and bus arbitration
Multi-master and multi-slave configuration
Up to 15 devices in a single system
Classification of GPIB Devices
GPIB system devices are categorized into three primary roles:
Controller
Manages bus communication (sends commands, controls data flow)
Only one active controller at a time
Example: A computer or controller card
Functions: Talker, Listener, and Controller-in-Charge
Talker
Sends data to other devices (usually the computer)
Example: Digital multimeter sending readings
Only one device talks at a time
Listener
Receives data or instructions from the controller or other devices
Example: Signal generator receiving settings
Note: Some instruments are Talker/Listener hybrids—they can both send and receive data depending on the command sequence.
In summary, the GPIB system relies on a clear structure of controller, talkers, and listeners to ensure orderly communication and automation in electronic test environments.
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