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Tree Traversal Rules
Command headers are created by traversing down the command tree. A legal
command header from the command tree would be :TIMEBASE:RANGE. This
is referred to as a compound header. A compound header is a header made up
of two or more mnemonics separated by colons. The compound header contains
no spaces. The following rules apply to traversing the tree.
Tree Traversal Rules
A leading colon or a program message terminator (<NL> or EOI true on the last byte)
places the parser at the root of the command tree. A leading colon is a colon that is
the first character of a program header. Executing a subsystem command places
the oscilloscope in that subsystem until a leading colon or a program message
terminator is found.
In the command tree, use the last mnemonic in the compound header as a
reference point (for example, RANGE). Then find the last colon above that
mnemonic (TIMEBASE:). That is the point where the parser resides. You can
send any command below this point within the current program message
without sending the mnemonics which appear above them (for example,
REFERENCE).
Programming Conventions
The Command Tree
5-5
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