In 1987, IEEE introduced Standard Codes, Formats, Protocols, and Common Commands, IEEEВ 488.2. These standards formalized the mechanical, electrical, and basic protocol parameters of GPIB, but said nothing about the format of commands or data. The standard was revised in 1987, and redesignated as IEEEВ 488.1 (IEEEВ 488.1-1987). In 1975, the IEEE standardized the bus as Standard Digital Interface for Programmable Instrumentation, IEEEВ 488 it was revised in 1978 (producing IEEEВ 488-1978). As GPIB became popular, it was formalized by various standards organizations. It became known as the General Purpose Interface Bus (GPIB), and became a de facto standard for automated and industrial instrument control. HP licensed the HP-IB patents for a nominal fee to other manufacturers. For example, the HP 59501 Power Supply Programmer and HP 59306A Relay Actuator were both relatively simple HP-IB peripherals implemented in TTL, without the need for a microprocessor. The bus was relatively easy to implement using the technology at the time, using a simple parallel bus and several individual control lines. They developed the HP Interface Bus (HP-IB) to enable easier interconnection between instruments and controllers (computers and other instruments). In the late 1960s, Hewlett-Packard (HP) manufactured various automated test and measurement instruments, such as digital multimeters and logic analyzers. 7 Comparison with other interface standards.

Ieee 488.2