Protocol analysis
R&S
®
RTP
755User Manual 1337.9952.02 ─ 12
it overwrites any subsequent frame description. However, instead of using a "catch all"
frame description, the built-in "undescribed bits" display as mentioned above may be
the better approach to create frame descriptions.
It is in the responsibility of the user to define unambiguous settings for each frame
type. For a description of these conditions in XML file format and the required XML
grammar and syntax, see Chapter 13.15.2.4, "XML syntax", on page 760.
Remote command:
BUS<m>:CMSB:FRAMe<n>:TYPE on page 1942
BUS<m>:CMSB:ADDFrame on page 1942
BUS<m>:CMSB:CLR on page 1942
BUS<m>:CMSB:FCOunt? on page 1942
Field name
A field description (which is represented by one row in one frame description) can be
created at any position of a frame description by clicking on "Insert". This brings up a
new field description in the active frame description, on top of the selected position.
The "Append" button adds a cell description at the end of a frame description, below
the lowest existing cell description. The number of Field descriptions is not limited. The
"Remove" button deletes a selected field description from the active frame description.
The field result can be selected to be displayed in a specified result column of the
decode table (see "Result" on page 760).
Note: The cell descriptions must be sequential and complete. No gaps are allowed,
since the "Bis" are used to calculate the start position of the next cell.
A frame type is identified when all user-defined cell conditions are met, which can be
regarded as related by the Boolean AND operator.
This can also locate a synchronization pattern, specified by the equal operator in the
field. For example, if you define a "Preamble" cell with the condition =FFFFFFFF, the
decoder scans the data for this pattern, and then synchronize to it.
The field in a frame are described by:
●
Field Name
●
"Bits" on page 756
●
"Condition" on page 756
●
"Format" on page 759
●
"Color" on page 760
●
"Result" on page 760
Remote command:
BUS<m>:CMSB:FRAMe<n>:CCOunt? on page 1943
BUS<m>:CMSB:FRAMe<n>:APPend on page 1943
Field Name
The strings in the column title describe cell names. They do not have to be unique; cell
names are just for user support.
Remote command:
BUS<m>:CMSB:FRAMe<n>:CELL<o>:NAME on page 1943
Custom: Manchester / NRZ (option R&S
RTP-K50)M
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