46 Keysight E8402A, E8404A C-Size Mainframes User and Service GuideProgramming the Enhanced Monitor Understanding SCPI CommandsCommand SeparatorA colon (:) always separates one command from the next lower-level commandas shown in the example subsystem above.Abbreviated CommandsThe command syntax shows most commands as a mixture of upper- andlowercase letters. The uppercase letters indicate the abbreviated spelling for thecommand. For shorter program lines, send the abbreviated form. For betterprogram readability, you may send the entire command. The instrument willaccept either the abbreviated form or the entire command.For example, if the command syntax shows DISPlay, then DISP and DISPLAY areboth acceptable forms. Other forms of DISPlay, such as DISPL or DISPLY willgenerate an error. You may use upper- or lowercase letters. Therefore, DISPLAY,display, and DiSpLaY are all acceptable.Implied CommandsImplied commands are those which appear in square brackets ([ ]) in thecommand syntax. (Note that the brackets are not part of the command and arenot sent to the instrument.) Suppose you send a second-level command but donot send the preceding implied command. In this case, the instrument assumesyou intend to use the implied command and it responds as if you had sent it.Examine the example subsystem above. The second level command [:WINDow]is an implied command (indicated by square brackets []). You can use eitherform::DISPlay:WINDow <display window> or :DISPlay <display window>
