Protocol analysis
R&S
®
RTO6
505User Manual 1801.6687.02 ─ 05
3. Tap the "Source" button and select the "Serial bus" trigger source.
4.
Select the serial bus that is set to I²C.
5.
Select the "Trigger type".
6. For more complex trigger types, enter the address and/or data conditions: address,
acknowledge bits, R/W bit, and data pattern.
For details, see Chapter 13.2.3, "I²C trigger", on page 499
13.2.4 I²C decode results
When the configuration of the serial bus is complete, the signal can be decoded:
1. In the "Serial Bus" dialog > "Setup" tab, enable "Decode".
2. In the "Serial Bus" dialog > "Display" tab, select additional result display settings:
"Show table" and "Show binary".
3. If required, enable "Zoom coupling"
For a description of the display settings, see also Chapter 13.1.3, "Display",
on page 487.
The instrument captures and decodes the signal according to the standard definition
and the configuration settings.
The color-coding of the various protocol sections and errors simplifies the interpretation
of the visual display. The decode information condenses or expands, depending on the
horizontal scale. Various data formats are available to show the result values.
Decode Results Table
The results are shown in two tables:
●
"Decode results": contains information about all decoded frames
●
"Details frame": contains more detailed information about the selected frame in the
"Decode results" table.
Table 13-2: Content of the Details frame table
Column Description
State Overall state of the frame.
"Insuffcient waveform length"
indicates that the
frame is not completely contained in the acquisition.
Change the horizontal scale, or move the reference
point to the left to get a longer acquisition.
Frame start Time of frame start
I²C (option R&S RT
O6-K510)
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