National Instruments GPIB-140A User Manual - page 10
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Chapter 1
Introduction
Hardware Overview
Note
You cannot use the GPIB-140A or GPIB-140A/2 bus extenders to
communicate with either a GPIB-140 or GPIB-140/2 bus extender. The GPIB-140A
and GPIB-140A/2 bus extenders use a different protocol to communicate with each
other across the fiber optic cable.
The GPIB-140A and GPIB-140A/2 are high-speed bus extenders that you can use in pairs with
fiber-optic cable to connect two separate GPIB 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.
Figure 1-1.
Typical Extension System (Physical Configuration)
Figure 1-2.
Typical Extension System (Logical Configuration)
PO
WER
LINK
ERR
OR
GPIB-140
FUS
Printer
(Listener)
GPIB Cable
Computer
(System Controller,
Talker, and Listener)
GPIB Cable
Fiber-Optic Cable
Signal Generator
(Listener)
Unit Under Test
Multimeter
(Talker and Listener)
GPIB-140A or
GPIB-140A/2
GPIB-140A or
GPIB-140A/2
GPIB Cable
PO
WER
LINK
ERR
OR
GPIB-140
FUS
Computer
(System Controller,
Talker, and Listener)
Printer
(Listener)
GPIB
Multimeter
(Talker and Listener)
Signal Generator
(Listener)
Unit Under Test