Viavi 3550 Operation Manual page 47

2-2. FUNCTION TABS AND FUNCTION WINDOWS (cont)
F u n c t i o n s a n d T i l e s - P T C
( O p t i o n a l F u n c t i o n s a r e s h o w n f o r d i s p l a y p u r p o s e s o n l y . )
2 - 4