4-1
Chapter 4
Field Bus Measurements
Introduction
Fieldbuses are bi-directional, digital, serial control
networks used in process control and industrial
automation.
The test tool can indicate the status of the following
aspects of the OSI model Physical Layer:
• Voltage levels (bias, high level, low level)
• Bit width – baud rate
• Rise and fall time
• Distortion
Moreover the test tool can show the bus signal waveform
in the Eye-pattern mode, see page 4-7.
The test tool operates in full automatic (ranging and
triggering) mode. Test limits are preset, but can be
changed, see page 4-8.
For supported bus types and protocols see Chapter 10,
section Fieldbus Measurements.
For extended information on Fieldbuses and fieldbus
measurement please consult Appendix A of this manual.
Note
To check a suspected cable you can perform
resistance measurements and capacitance
measurements using the Scope/Meter mode.
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