Input impedance : 1M£[.
width of min. pulse : 30 ns.
max. input frequency : 17MHz.
measurable Logic Gate : TTL and CMOS
Logic 1 (red LED Lights)and then buzz. 2.3V±0.2V 70% Vcc
Logic 0 (green LED lights)and then buzz. 0.8V± 0.2V 30%
input overvoltage protection : ±220V DC/AC 15 sec.
Pulse (yellow LED) flashing time : 500ms.
Power supply protection : ±20V.
Special functions for LP-3500
Two audio tones.
Two external terminal.
is also available for LP-2800 but at extra-pay
The K&H LP-540H
logic pulser is a very effective tool for
inspecting and repairing the logic circuits. It can be
used direcetly to inject a signal into the logic circuits
without removing the IC or reading the circuits. Using
the logic probe as a monitor, you can not only know the
wiring errors but also check out components malfunctional.
The reason is that it can produce a very large transient
current in a moment. Since the average power to be
produced under these conditoins is very small, the
injected signal will not destroy any one of the
componetns in the circuits. Further, the pulser takes
advantage of the voltage produced by a current flowing
through the inherent resistance of the circuit to produce
the injected signal.
Logic Pulser can produce a 10µ s pulse signal at 100mA
The signal frequency may be switched to either 0.5Hz or
and as a result the Logic Pulser is a fairly powerful
pulser. At the
same time, the Logic Pulser can produce a 90% high
at square wave output terminal, and it is easier to
trace circuits by using oscilloscope. The logic Pulser
has a sync input point, which can be used to produce an
Frequency : 5Hz ~ 40MHz
Duty cycle : 0.01% ~ 49.9%
Pulse width : 9nS ~ 999µS
Input signal : TTL or CMOS level (5V system)
Input impedance : 400k
Sample cycle : 400mS
Display rate : 2.5 reading/second
LP-420D µ ¡¦P DIGITAL LOGIC PROBE
SPECIAL FUNCTION FOR LP-420D
Duty cycle meter
Pulse width meter
Auto range, auto display