Introduction
Chapter 1
GPIB-140 User Manual
1-2
© National Instruments Corp.
Hardware Description
The GPIB-140 and GPIB-140/2 are high-speed bus extenders that are used in pairs with
fiber optic cable to connect two separate GPIB (IEEE 488) bus systems in a functionally
transparent manner.
Although the two bus systems are physically separate, as shown in Figure 1-1, devices
logically appear to be located on the same bus, as shown in Figure 1-2.
POWER LINK
ERROR
GPIB-140
FUSE
POWER LINK
ERROR
GPIB-140
FUSE
Printer
(Listener)
Computer
(System Controller,
Talker, and Listener)
GPIB-140 or
GPIB-140/2
GPIB Cable
GPIB Cable
GPIB Cable
Multimeter
(Talker and Listener)
Signal Generator
(Listener)
Unit Under Test
Fiber Optic Cable
GPIB-140 or
GPIB-140/2
Figure 1-1. Typical Extension System (Physical Configuration)
Computer
(System Controller,
Talker, and Listener)
Printer
(Listener)
GPIB
Multimeter
(Talker and Listener)
Signal Generator
(Listener)
Unit Under Test
Figure 1-2. Typical Extension System (Logical Configuration)
