Fluke 125 - Page 59

Field Bus Measurements
Reading the Screen
4
4-5
Property Explanation
1
VBias
CAN-Rec. H-L
CAN-Rec. H
CAN-Rec. L
V High
Vpk-pk
Bias voltage
CAN-recessive high to low level voltage
CAN-recessive high level voltage
CAN-recessive low level voltage
High level voltage
Peak to peak voltage
2
V-Level High-Bias
V-Level Bias-Low
CAN-DOM. H-L
CAN-DOM. H
CAN-DOM. L
V Low
V-Level pk-pk
V-level high
V-level low
High level to bias level voltage
Bias level to low level voltage
CAN-dominant high to low level voltage
CAN-dominant high level voltage
CAN-dominant low level voltage
Low level voltage
Peak to peak voltage
High level voltage
Low level voltage
3
Data
Data Baud
Bit width
Baud rate
4
Rise Rise time as % of bit width
5
Fall Fall time as % of bit width
6
Distortion Jitter
Distortion Overshoot
Distortion Amplitude
Jitter distortion
Signal distortion, over- and undershoot
Amplitude distortion (AS-i bus)
Table 4-3. Bus Test Screen Indicators
: bus activity indicators.
Bus activity indicator 1:
Q (filled) : voltage measured
{ (open) : no voltage measured
Bus activity indicators 2 and 3:
{ { (both open) : no activity
ÑÑ(blinking) : activity
Busy, the test tool is measuring/processing
data.
No reading available.
Test OK. Measurement results are within 80%
of allowable range, see figure 4-3.
Warning. Measurement results are between
80% and 100% of allowable range, see figure
4-3.
Test failed. Measurement results are out of
allowable range, see figure 4-3.