*20
	12-D6BB
	 
	VR12 DISPLAY TST
	 
	ST ADD
	LOC 20
	 
	SW SET
	SSW0=1 RETURN TO DIAL MONITOR
	STRIKING F KEY ON TTY DIRECTS   THE PROG TO LOCK ONTO THE CURRENT DIS
	STRICKING ANY OTHER TTY KEY WILL DIRECT THE PROG TO ALTERNATE BETWEEN   THE THREE PATTERNS