R&S PR100 User Manual
ASCII character # introduces the data block. The next number indicates how
many of the following digits describe the length of the data block. In the
example the 4 following digits indicate the length to be 5168 bytes. The data
bytes follow; a single character for each byte. Data elements comprising more
than one byte are transmitted with the byte being the first that was specified
by SCPI command "FORMat:BORDer".
During the transmission of the data bytes all flow-control (e.g End-of-Line) that
is sent as an ASCII character is ignored until all bytes are transmitted. Note
that e.g. a VXI-11 connection also has flow-control that is not sent as ASCII
characters.
Expressions
Expressions must always be in parentheses.
Syntax Elements
Table 1 offers an overview of the syntax elements.
Table 1: Syntax Elements
Element Comment
: The colon separates the key words of a command. In a command
line the colon after the separating semicolon marks the uppermost
command level.
; The semicolon separates two commands of a command line. It
does not alter the path.
, The comma separates several parameters of a command.
? The question mark forms a query.
* The asterisk marks a common command.
“ Quotation marks introduce a string and terminate it.
# ASCII character # introduces block data.
A "white space" (ASCII-Code 0 to 9, 11 to 32 decimal, e g blank)
separates header and parameter.
() Parentheses enclose an expression (channel lists).
9.2 Status Reporting
The status reporting system stores all the information on the present operating
state of a device and on errors that have occurred. This information is stored
in the status registers and in the error queue.
For each remote client of a device there is a separate status reporting system
that offers access to all registers of the error queue. The registers form a
hierarchical structure. The register “status byte” (STB) defined in IEEE 488.2
and its associated mask register “service request enable” (SRE) form the
uppermost level.
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