User Manual
Protocol Analysis
R&S
®
Scope Rider RTH
164User Manual 1326.1578.02 ─ 08
To adjust the scaling of the decoded bus signal in scope mode
1. The horizontal size of the combs is defined by the horizontal time scale, which is
the same for input signals and the bus signal. Press the TIME keys to change the
time scale.
2. The vertical size is specific for the bus signal.
a) Tap the bus signal to set the focus to it.
b) Press the RANGE keys.
Protocol mode
In "Protocol" mode, you see the results table and the small signals below. Each table
row contains the information of one frame.
All menus that are relevant for protocol analysis are available, in particular, the "Bus"
and "Trigger" menus. Thus, you can adjust the settings without changing the mode.
Sometimes the row is too short to show the all frame information. To show the com-
plete information, tap the row. A window with values and time data of the selected row
opens.
8.1.3 Label Lists
For all protocols using ID or address identification, it is possible to create label lists
containing addresses or IDs, a symbolic name for each node (symbolic label), and
some protocol-specific information.
You can load label lists, and activate its usage for decoding. As a result, an additional
"Label" column appears in the "Decode results" table, containing the symbolic label.
The frame captions of the decoded signal show the symbolic label instead of the ID or
address values so it is easy to identify the messages of the different bus nodes.
You can also also use the label list to trigger on an identifier or address. Instead of
entering the value, you select the identifier on the label list.
Available file formats are PTT, CSV, and DBC (CAN only).
Label lists are protocol-specific. Their contents are described in the corresponding pro-
tocol chapters:
●
Chapter 8.2.4, "I²C Label List", on page 172
●
Chapter 8.5.3, "CAN Label List", on page 192
●
Chapter 8.6.4, "LIN Label List", on page 201
8.1.3.1 Using Label Lists
To load a label list and display the labels:
1. Save the label list file on a USB flash drive, or on the microSD card.
2. Press and hold the BUS key until the menu opens.
Basics of Protocol Analysis