Tektronix WCA230A, Programmer'S Manual

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Command Syntax
WCA230A & WCA280A Programmer Manual
2- 7
You can chain several commands or queries together into a single message. To
create a chained message, first create a command or query, add a semicolon (;),
and then add more commands or queries and semicolons until the message is
complete. If the command following a semicolon is a root node, precede it with a
colon (:). Figure 2--3 illustrates a chained message consisting of several
commands and queries. The single chained message should end in a command or
query, not a semicolon. Responses to any queries in your message are separated
by semicolons.
:CALC:MARK:X 100;:SENS:AVER:STAT ON;:DISP:WAV:Y:PDIV?;:READ:SPEC:CFR?
First command Second command Second query
The response from this chained message
might be
Response from first query Response from second query
100;1.2E+9
First query
Figure 2- 3: Example of chaining commands and queries
If a command or query has the same root and lower-level nodes as the previous
command or query, you can omit these nodes. In Figure 2--4, the second
command has the same root node (TRIG:SEQuence) as the first command, so
these nodes can be omitted.
First command Additional commands
(omitted the root nodes)
Identical root and lower-level nodes
:TRIG:SEQ:MODE NORM;:TRIG:SEQ:SLOP NEG;:TRIG:SEQ:POS 50
:TRIG:SEQ:MODE NORM;:SLOP NEG;POS 50
Figure 2- 4: Example of omitting root and lower-level nodes in a chained message
Chaining Commands and
Queries