Logic Probe Logic Probe

Product Description

A high quality logic probe for use with TTL DTL & CMOS ICs. The probe has a memory function which can detect the occurrence of single pulses or logic level. One shot & low repeat rate narrow pulses which are nearly impossible to see even with a fast scope are easily detectable & visible. The probe has three LEDs red for high logic level green for low logic level & yellow for pulse. The intensity of the pulse LED is directly proportional to the duty cycle of the signal observed. All single pulses or pulse trains are recognised from 30ns up to 500ms. The probe is supplied with approx. 500mm lead terminated in a red & black probe clip. In use the red clip should be connected to the positive of the circuit under test & the black to the negative. When making the connection the yellow LED may blink once or twice but if it continues to blink the power supply has excessive ripple. With the switch in TTL position a 5V supply must be used but in CMOS position voltage may be between 3V & 18V DC. Pulse detector High speed pulse train or single events or
- transitions activate 500ms pulse stretcher. In memory position first transition lights & latches LED. Detection Levels Logic Lights LEDDTLTTLCMOS1 Red Hi 2.3V plusmn 0.2V70 of VS plusmn 100 Green Lo 0.8V plusmn 0.2V30 of VS plusmn 10 Bad No indication 0.8V to 2.3V30 to 70 of VSDetectable pulse width 30ns min Input impedance 1MOmega Input signal Frequency 17 M Hz Input overload Protectionplusmn 220V DCAC for 15s Probe power 25m A to 40m Aat 5V to 15V DCProbe power Protectionplusmn 20V max with leadreversal protection Dimensions 212 x 26.5 x 18mm Weight 65g