Fluke 19xC, User Manual

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Fluke 19xC-2x5C
Users Manual
76
Profibus PA/31.25 kBit/s
Default probe setting 10:1. Use the Fluke 10:1 probe.
1 Connect the red probe to test tool input A
2 Connect the probe ground lead to the PA bus -
3 Connect the probe tip to the PA bus +
DATA +
DATA -
Figure 42. Profibus PA Measurement Connections
Warning
Profibus PA is optimized for process control
with focus on explosion safety.
When planning tests on this bus type, make
sure the proper safety rules are adhered to!
Table 8. Profibus PA Tested Signal Properties
Signal Description
V-Level Bias Bias voltage level
V-Level Peak-peak voltage
Data Bit width
Rise Rise time as % of bit width
Fall Fall time as % of bit width
Jitter Jitter distortion
Signal Dist. Signal distortion
Noise-HF High Frequency noise >39.1 kHz
Noise Mid Frequency noise 7.8 -39.1 kHz
Noise-LF Low Frequency noise < 7.8 kHz
Note
The bus normally has continuous data traffic.