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Restrictions
3026 Programmer Manual
C
B
A
F
Linear Configuration
A
B
C
Combination of Star and
E
Linear Configurations
D
A
C
B
Figure 1 3: GPIB system configurations
Consider the following restrictions when distributing instruments on the GPIB
bus:
1. No more than 15 total devices (including the controller) can be included on a
signal bus.
2. In order to maintain the electrical characteristics of the bus, one device load
must be connected for every two meters of cable (most often, each device
represents one device load to the bus).
3. The total cable length (cumulative) must not exceed 66 feet (20 meters).
4. At least two-thirds of the device loads must be powered on.
Star Configuration
D
E
D
E
F
F
G
H
Getting Started
1 3
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