SCPI Commands
SCPI command headers may consist of several keywords (mnemonics), separated by the colon character (:).
Each keyword in a SCPI command header represents a node in the SCPI command tree. The leftmost keyword is the root level keyword, representing the highest hierarchical level in the command tree.
The keywords following represent subnodes under the root node.
Example: :SYST:CONF "Sample Interval=15ms"
In this example first colon (:) referers to the root of the tree. Next, SYST refers to an item under root, and CONF referes to an item under SYST.