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WF1947/WF1948 Instruction Manual (External Control)
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(B) Current path movement
The current path is a level within the command tree, and becomes the first level from which the parser starts the
search when the user sends the next command. The parser determines the current path according to the
following rules.
(1) At power-on and reset
The current path is set to the root.
(2) Message terminator
Upon reception of a message terminator, the current path is set to the root.
(3) Colon (command separator)
When a colon is placed between two keywords, the colon moves the current path one level down in the
command tree.
(4) Colon (root specifier)
When a colon is placed at the beginning of a command, the current path is set to the root.
(5) Semicolon
Semicolons do not affect to the current path.
(6) Space
Spaces do not affect to the current path.
(7) Comma
Commas do not affect to the current path.
(8) IEEE488.2 common commands
Common commands do not affect to the current path.
By using semicolons properly, multiple commands can be sent efficiently.
For example,
:SOURce:VOLTage:LEVel:IMMediate:AMPLitude 1.0; OFFSet 1.0
is the same as sending the following two commands:
:SOURce:VOLTage:LEVel:IMMediate:AMPLitude 1.0
:SOURce:VOLTage:LEVel:IMMediate:OFFSet 1.0
When an optional keyword is omitted, you should pay careful attention to the current path movement.
For example,
:VOLTage 1.0
sets the current path to ":SOURce." Therefore, if following two program messages
:SOURce:VOLTage:LEVel:IMMediate:AMPLitude 1.0
:SOURce:FREQuency:FIXed 1000.0
are send as one program message,
:SOURce:VOLTage:LEVel:IMMediate:AMPLitude 1.0; FREQuency:FIXed 1000.0
Содержание Wave Factory WF1947
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