Chroma 66201 - Traversal of the Command Tree

Using Remote Control
Response Message Terminator (<RMT>):
A response message terminator represents the end of a response message. Three permitted
terminators are:
When sets the SYSTem:TRANsmit:TERMinator as 0 :
(1) LF( i.e.: NL, new line) : line feed which is a single ASCII-encoded byte 0A (10
decimals).
(2) LF+EOI : line feed with end or identify(EOI).
When sets the SYSTem:TRANsmit:TERMinator as 1 :
(3) CR+LF : cursor return and line feed which are a single ASCII-encoded byte 0D
(13 decimals) and a single ASCII-encoded byte 0A (10 decimals).
(4) CR+LF+EOI : cursor return and line feed with end or identify(EOI).
5.7 Traversal of the Command Tree
Multiple program message unit elements can be sent in a program message. The first
command is always referred to the root node. Subsequent commands are referred to the same
tree level as the previous command in a program message. A colon preceding a program
message unit changes the header path to the root level.
Example:
TRIGger : STATe? All colons are header separators.
: TRIGger : STATe? Only the first colon is a specific root.
TRIGger : STATe? ; : VOLTage : RANGe V150 Only the second colon is a specific root.
Headers
Data
Message Terminator
Root Specifier
CURR : SHUN LOW ; RAN
G A001 ; : MEAS : CURR ?
<
LF
>
Query Header
Headers Separator
Message Unit Separator
Figure 5-1 The Structure of Program Message
5-7