Agilent Technologies Infiniium 90000 Series Programmer's Manual page 141

8
Programming Conventions
In this example, the leading colon before CHANNEL1 tells the parser to go
back to the root of the command tree. The parser can then recognize the
:CHANNEL1:OFFSET command and enter the correct node.
Agilent Infiniium 90000 Series Oscilloscopes Programmer's Reference 141