Logic Probe EM4610A configuration

Introduction
This unit is a logic troubleshooting instrument which gives visual (LED light) and audio indications for logic levels and pulses. 
It can also capture positive or negative events as short as 30 nanoseconds. 

Operation Instruction 
1.Connect the black alligator clip to ground or common of the circuit to be tested, the red alligator clip to Vcc of the circuit. 
2.According to the type of logic to be tested, select TTL or CMOS with the TTL/CMOS switch. 
Note: The level is nominal 0 to 5 VDC, and CMOS levels are 0 to 5-15VDC . 
For Pulse or Logic level testing, set the PULSE/MEM switch to PULSE position 
3.Touch the probe tip to the circuit point to be tested, The unit will give LED and sound indications indicating the logic level or signals. 
4.Setting the PULSE/MEM switch to MEM position allows the unit to capture a positive or negative pulse, the yellow LED will light and PULSE position.