Anritsu MG3641A - Manual (Page 122)

SECTION 6 GPIB
6-16
(3) Program message unit
• The program header of the IEEE488.2 common command is prefixed by an asterisk (*).
• The program header of the program query is suffixed by a question mark (?).
(4) Program data
’
SP Program header Program data
Numeric program data
Logical program data
Character program data
Suffix data (unit)