66 Keysight E8402A, E8404A C-Size Mainframes User and Service GuideProgramming the Enhanced Monitor DISPlay SubsystemDISPlay[:WINDow]:TEXT[:DATA] DISPlay[:WINDow]:TEXT[:DATA] displays a user defined message string on themainframe’s display. The message remains on the display until a key is pressed,the display window is changed programmatically, or the screen saver turns offthe display.ParametersComments– Four lines of text can be displayed. The display uses a proportional font;line length can vary from 25 to 45 characters. The string will be clipped at45 characters if there is not an embedded ‘\n’, or it will be clipped at 4lines, or at 186 characters. There is no error generated if the string isclipped. Text is white letters on a black background.)– Embed a ‘\n’ to cause a second, third, or fourth line. For example, thecommand DISP:TEXT “this is a test\nof the immediate\nmessage capability.” executed from an RS-232 terminal will createthe following display:this is a testof the immediatemessage capability.– Pressing any front panel key (up/down arrow keys or ENTER key) orexecuting a DISP:WIND command will remove the text.Error ConditionsThe following table lists the most common error conditions and causes. Errornumbers and corresponding messages can be found using SYSTem:ERRor?query.Name Type Range Default Description<string> string 186 characters none Message to display on screen. Can be any ASCIIcharacter (decimal value 20 to 225).Number Message Probable Cause-128 “Numeric data not allowed” The started with a number.-148 “Character data not allowed” Quotation marks were left off.-151 “Invalid string data” An embedded new line in the string insteadof a ‘\n’.-221 “Settings Conflict” The mainframe’s power is off.
