© TRIGGERING MODE (TRIG MODE) Selector Switchesand LEDsS w i t c h e s and L E D s used to select the trigger operationmodes.A U T O / N O R M : Pressing the s w i t c h turns on the LEDand selects the automatic mode. S w e e pis triggered by the trigger signal. Ab-sence of the trigger signal causes freerunning and displays a trace line.Another press of the s w i t c h turns offthe LED and selects the normal mode.S w e e p is triggered by the trigger signal.Different from A U T O , however, no traceline is displayed if appropriate trigger sig-nal is provided.S I N G L E : Pressing the s w i t c h turns on the LED andselects the single s w e e p mode. In this mode,the A s w e e p and B sweep cannot be observedsimultaneously.This s w i t c h also serves as the reset switch forthe single sweep mode. T o reset setting of thesingle s w e e p mode, press the A U T O / N O R Ms w i t c h to set to A U T O .R E A D Y : By pressing the S I N G L E s w i t c h in the singles w e e p mode, the ready state is selected andthe L E D lights up, w h i c h remains lighting un-til s w e e p is completed.F I X / F L D 1 / F L D 2F I X : Pressing the s w i t c h turns on the LED andthe A s w e e p trigger level is fixed. In thisc a s e , triggering is made regardless of AL E V E L control @) setting.Another press of the s w i t c h turns off theL E D and restores the normal condition.N O T E : In the single s w e e p mode, thez i R E F or D E L A Y P O S I T I O N , A,P O S I T I O N , and S W E E PV A R I A B L E controls are not oper-able. T h e clock correction modecan also be unselectable.F L D 1 / F L D 2 :Used for switching between FLD1 and F L D 2in the T V C O U N T E R mode. F L D 1 and F L D 2alternate each time the s w i t c h is pressed.S I N G L E + F I X :Pressing S I N G L E and F I X simultaneouslywhile in the T V C O U N T E R mode enablesswitching between the N T S C and P A Lmodes. N T S C and P A L alternate each timethe s w i t c h is pressed.@ Carrying HandleThis carrying handle is fixable at every 15 degrees forhorizontal or tilted installation of the instrument. T h eattached probe holder shall be put on the metal portionof the handle.