User manual

Protocol Analysis
R&S
®
RTO
256User Manual 1316.0827.02 ─ 06
The editor displays the pattern in two columns. The left column always shows binary data.
For the right column, you can select the format, the default depends on the data specifics.
You can edit data in the left or right column. The keypad adapts itself to the column format,
only keys appropriate to the format are enabled.
The data is grouped and converted in bit groups. The size of a bit group depends on the
address or data specifics and is set by the instrument. Groups are automatically sepa-
rated by blanks. The maximum size of a bit group is 64 bit, the most common group size
is 1 byte.
"Overwrite mode": If disabled, the data behind the new digit is shifted to the right. Bit
groups are rearranged. automatically.
Format-specific information:
●
Binary: 0, 1 and X (dont care) are allowed.
●
Decimal: If you enter a decimal number that is too large for the defined bit group, the
number is truncated and a message appears. X (don't care) in the decimal column
sets all binary digits of the bit group to X.
●
Hex: most common format in the right column.
●
Octal: Each digit represents 3 bit.
●
ASCII: In the ASCII column, "X" is the character X. The binary X (don't care) is not
allowed. If an X is included in the binary value in the left column, the ASCII columns
displays "§" to indicate that the value is not defined.
Where applicable, frequently used values are provided in a "Predefined values" list below
the pattern table, for example, reserved end words of data packets in the UART protocol.
10.2 I²C
The Inter-Integrated Circuit is a simple, low-bandwidth, low-speed protocol used for com-
munication between on-board devices.
I²C