Tektronix AFG2021 Programmer's Manual page 25

Command Syntax
NOTE. The numeric suffix of a command or query may be included in either the
long form or short form; the instrument will default to "1" if no suffix is used.
Chaining Commands and
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
Queries
(;), 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 (:). The following figure 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.
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 the following figure, the second
command has the same root node (TRIGger:SEQuence) as the first command,
so these nodes can be omitted.
Figure 2-4: Example of omitting root and lower-level nodes in a chained message
Unit and SI Prefix If the decimal numeric argument refers to amplitude, frequency, or time, you can
express it using SI units instead of using the scaled explicit point input value
format <NR3>. (SI units are units that conform to the Systeme International
d'Unites standard.) For example, you can use the input format 200 mV or 1.0 MHz
instead of 200.0E-3 or 1.0E+6, respectively, to specify voltage or frequency.
AFG2021 Arbitrary Function Generator Programmer Manual 2-7