Keysight Technologies B2961A - Message Unit Separator; Root Specifier; Query Indicator; Message Terminator

Keysight B2961A/B2962A SCPI Command Reference, Edition 6 1- 7
Programming Basics
SCPI Messages
*RST<NL>
VOLTage 20<NL>
Message Unit Separator
When two or more message units are combined into a compound message, separate
the units with semicolons.
STATus:OPERation?;QUEStionable?
Root Specifier
When it precedes the first header of a message unit, a colon is interpreted as a root
specifier. It tells the command parser that this is the root or the top node of the
command tree.
Query Indicator
Following a header with a question mark turns it into a query (VOLTage?,
VOLTage:TRIGgered?). The ? is the query indicator. If a query contains parameters,
place the query indicator at the end of the last header, before the parameters.
VOLTage:TRIGgered? MAX
Message Terminator
A terminator informs SCPI that it has reached the end of a message. The following
message terminators are permitted.
• newline <NL>, expressed in ASCII as decimal 10 or hex 0A
• end or identify <END> (EOI with ATN false)
• both of the above <NL><END>
• also <CR><NL>
In the examples used in this document, there is an assumed message terminator at
the end of each message.