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IM 701610-61E
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C-Bus Signal Analysis Function
Items to Be Analyzed
The following data can be analyzed:
• Historical data.
• Data that are displayed when the waveform acquisition is stopped.
• Loaded acquisition data (ACQ data).
Analysis is performed only on the waveform selected by “Select Record” for historical
data.
Analysis Range
Analysis is performed on the acquisition data within the display screen. Up to 40000
bytes of the analysis results can be displayed. The displayed result varies depending on
the number of bytes analyzed as follows:
• When the total analysis result is less than or equal to 40000 bytes
All points are displayed regardless of the position of the Reference Point.
• When the total analysis result is greater than 40000 bytes
The displayed result varies depending on the number of analysis results on the Pre*
and Post* sides as follows:
• When the Pre side = 30000 and the Post side = 30000
→
Pre side = 20000 and
Post side = 20000
• When the Pre side = 10000 and the Post side = 50000
→
Pre side = 10000 and
Post side = 30000
• When the Pre side = 50000 and the Post side = 10000
→
Pre side = 30000 and
Post side = 10000
* Pre: Start from the reference point and display back (to the left)
Post: Start from the reference point and display forward (to the right)
Notes When Performing Analysis
• Analysis and search cannot be performed while the waveform acquisition is started.
• Analysis and search cannot be performed on accumulated waveforms.
Executing the Analysis
When analysis is performed, the results are listed on the right side of the screen.
• List of Analysis Results
The following items are displayed.
No.: Up to 40000 points can be displayed.
Hex: The analyzed data is displayed using hexadecimal notation. However, if a byte
of data is less than 8 bits, the data is not displayed. If indefinite data exists, “*”
is displayed. Indefinite data is considered the same value as the previous bit for
the analysis. If the first data is indefinite, it is considered 0 for the analysis.
Ack: Displays the Acknowledge bit condition.
Note
If you execute the analysis and select (highlight) an arbitrary byte in the list of analysis
results, the Zoom Position moves to the head of that byte. In addition, if you move the Zoom
Position, the highlighting moves to the corresponding byte in the list of analysis results.
1.5 Analyzing/Searching Data
