Rohde & Schwarz RTP044 - Ethernet Decode Results

Protocol analysis
R&S
®
RTP
637User Manual 1337.9952.02 ─ 12
13.9.4 Ethernet decode results
When the configuration of the serial bus is complete, the signal can be decoded:
1. In the "Protocol" dialog > "Setup" tab, enable "Decode".
2. In the "Protocol" dialog > "Display" tab, select additional result display settings:
"Show decode table" and "Show binary signals".
For a description of the display settings, see also Chapter 13.1.3, "Display",
on page 514.
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 13-12: Content of the Decode results table
Column Description
State Overall state of the frame: either OK or the relevant error condition (preamble,
length)
Start Start time of the frame
Type Frame type
Destination Destination address of the frame
Source Source address of the frame
Type/Length The subprotocol (e.g. HTML, video, etc.) determines what meaning this field has.
Since the content of this data area is not decoded, the interpretation of this field is
ambivalent. It could either be the word type (specific for the subprotocol) or the
word length.
Data Values of the data bytes in a frame. The table shows a truncated version; to see all
the bytes in a separate data table, activate "Show details". The data format is
always hexadecimal.
CRC FrameCheck (Cyclic Redundancy Code, CRC)
Ethernet 10BASE-T and 100BASE-TX (option R&S RTP-K8)