Burst Electronics MCG-2 - Manual (Page 59)

58 MCG-2 Micro Character Generator
Also if the command has more than one parameter a comma must
separate each parameter. This error may also be produced if a comma is
misplaced. This would be the case if a command wanted two digit
parameters and was issued with single digit parameters. Example: The
page position command (P
P P P PP P P P P) needs two digit parameters. The
command sequence P P P P PP,9,6 P,9,6 P,9,6 P,9,6 P,9,6 would produce an error, while the
command sequence P P P P PP,0 P,0 P,0 P,0 P,09,0 9,0 9,0 9,0 9,06 6 6 6 6 would not.