Elenco Electronics LP-560 User Manual

LOGIC PROBE
MODEL LP-560
• TESTS ALL LOGIC FAMILIES (TTL, LSI, CMOS, ECT)
• CAPTURES PULSES TO 25ns (20MHz)
• AUDIO BEEPER, TWO SOUNDS HI & LOW
• MEMORY FUNCTION
SPECIFICATIONS
Working Voltage 4-18VDC
Frequency Response 20MHz
TTL: Logic “1” (HI LED) >2.3 +
0.2VDC
Logic “0” (LO LED) <0.8 +
0.2VDC
CMOS: Logic “1” (HI LED) >70% Vcc +
10%
Logic “0” (LO LED) <30% Vcc +
10%
Minimum Detectable
Pulse Width 25ns
Input Impedance 1MΩ
Input Overload Protection +
220VAC/DC, 15s
Supply Voltage Protection +
20VDC
Pulse Indicator Flash Time 500ms
Operating Temperature 32° - 122°F
USER INSTRUCTIONS
1. Set the TTL/CMOS switch to the correct logic
and the PULSE /MEM to PULSE.
2. Connect the red alligator clip to the positive
(+) supply and the black alligator clip to the
negative (–) supply of the test unit.
3. Touch the point to be tested with the probe tip
and refer to the chart below:
- LED on - LED off - LED Blinking - LED may be on or off
Memory Mode
1. Touch the point to be tested and set
PULSE/MEM switch to MEM. The pulse LED
lights with the first transition. The LED stays lit
until its reset by switching to the PULSE position.
Elenco
®
Electronics, Inc.
150 Carpenter Ave.
Wheeling, IL 60090 U.S.A.
www.elenco.com
(847) 541-3800
Made in CHINA
INPUT
SIGNAL
LED STATES
HIGH LO PULSE
SOUND
Logic tip is not connected or bad logic
level.
Low Logic “0”, no pulse activity.
High Logic “1”, no pulse activity.
Low Logic “0”, with positive single pulses.
High Logic “1”, with negative single pulses.
Low/High Square wave <200kHz.
Low/High Square wave >200kHz.
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Elenco Electronics LP-560 Specifications

General

Brand	Elenco Electronics
Model	LP-560
Category	Accessories
Language	English

Summary

Logic Probe LP-560 Specifications

Logic Level Specifications

Defines logic level thresholds for TTL (>2.3V for HI, <0.8V for LO) and CMOS (>70% Vcc for HI, <30% Vcc for LO).

Performance Characteristics

Details minimum detectable pulse width (25ns), input impedance (1MΩ), overload protection (+220VAC/DC for 15s), and supply voltage protection (+20VDC).

Indicator and Operating Parameters

Specifies pulse indicator flash time (500ms) and operating temperature range (32°-122°F).

User Instructions for Logic Probe Operation

Initial Setup and Connection

Set TTL/CMOS and PULSE/MEM switches, then connect alligator clips to power supply.

Basic Testing Procedure

Touch test points with probe tip and interpret LED states and sound for logic levels and pulses.

Memory Mode Operation

Set PULSE/MEM switch to MEM to capture and hold the first detected transition on the pulse LED.