IEEE 488 is a short-range digital communications 8-bit parallel multi-master interface bus specification developed by Hewlett-Packard as HP-IB (Hewlett-Packard Interface Bus). It subsequently became the subject of several standards, and is generically known as GPIB (General Purpose Interface Bus).
What limits the data rate in the IEEE 488 bus?
GPIB features / parameters summary
| IEEE 488 bus / GPIB Features Summary | |
|---|---|
| Parameter | Details |
| Bus management lines | 5 |
| Connector | 24-pin Amphenol (typical) D-type occasionally used. |
| Max data rate | ~ 1 Mbyte / sec (HS-488 allows up to ~8Mbyte / sec). |
Why IEEE 488 bus is used in microprocessor based measuring instruments?
Figure 6.28 shows a block diagram of a microprocessor based impedance measuring instrument. The operation makes interface with the instrument via the IEEE 488 bus to allow control by, or to make the measurement available to, a large external computer system.
How many devices can be connected to a single IEEE 488 bus?
15 devices
Interconnection Cabling Any individual IEEE-488 bus is limited to 15 devices including the controller.
What is PCI GPIB?
PCI, IEEE 488 GPIB Instrument Control Device—The PCI‑GPIB is a plug‑and‑play IEEE 488 interface for PCs and workstations with PCI expansion slots. The PCI‑GPIB can sustain data transfer rates of more than 1.5 MB/s using the IEEE 488.1 three‑wire interlocked… Read More.
What is GPIB address?
A GPIB address is made up of two parts: a primary address and an optional secondary address. Most devices just use primary addressing. The GPIB Controller manages the communication across the GPIB by using the addresses to designate which devices should be listening or talking at any given moment.
What is the IEEE-488 bus?
Since IEEE-488 bus is well standardized and tested; the majority of manufacturers of automated measuring systems and instruments build GRIB interfaces into their devices as the main data transfer channel.
What is the IEEE 488 or GPIB connector?
This provides an ideal physical interface for the standard. The IEEE 488 or GPIB connector is very similar in format to those that were used for parallel printer ports on PCs although the type used for the GPIB has the advantage it has been changed so that several connectors can be piggy-backed.
What is GPIB (general purpose interface bus)?
GPIB is an interface bus or connection system used primarily to link electronics test equipment to a central controlled to run automated tests although it can be used for many data communication requirements. The GPIB or General Purpose Interface Bus or IEEE 488 bus is still one of the more popular and versatile interface standards available today.
What is the difference between ieee488 and HPIB?
To be sure the IEEE488 interface is an old and dated method of commanding a piece of equipment. But again, if you only need to transfer an 8-bit command every few seconds the HPIB will continue to be found on lab gear; although not on all new gear. A quick check indicates that a high speed BERT does include a GPIB interface as an option.
