Pico Automotive have introduced a new 8-channel Automotive
Oscilloscope called the 4823. It is the world's first high-resolution,
8-channel automotive oscilloscope fast enough for CAN, CAN-FD and FlexRay,
including serial data decoding.
Why are 8 channels necessary?
PicoScope 4225A, 4425A and 4823 Automotive Oscilloscopes
Eight channels facilitates testing of five, six and eight cylinder engines.
V6 / V8 CAM timing (4/6 cams plus crank, and sometimes a WPS500X Pressure Sensor ),
and VVT timing systems. Trucks, earthmoving and agricultural vehicles often require
a mix of electrical and hydraulic measurements on multiple valves simultaneously to
diagnose problems with system interaction. The 4823 is ideal for full system diagnosis
on components (including power, ground, signals, current) and general engine diagnostics
where many signals need to be monitored simultaneously.
The 4823 is very similar to the 4225A and 4425A oscilloscopes (i.e. 12 bits, 20 MHz) but
there are a few specifications and features that are different. Please refer to the
specifications for full details. We have summarised notable differences below:.
A useful addition is an arbitrary waveform and function generator, which allows you to simulate
waveforms to test and stimulate actuators and mimic responses from sensors. Please note that you
may need a special isolator, buffer amplifier or driver to use this feature successfully in the
field due to the relatively high impedance and low over-voltage specification of the output. Please
contact us should you require any assistance with this feature.
Deciding between a 4425A and a 4823
The 4425A is much more rugged than the 4823. It has a convenient hanging strap and a rubber boot
to protect it in the harsh automotive environment. Its inputs can withstand much higher voltages
than the 4823 (250V vs 100V). It has floating grounds and has a much higher sampling rate
(400MS/s vs 80MS/s). The 4823 has many specialised applications but the general workshop
technician should, as a general rule, always choose the 4425A unless there is a really
pressing need for an eight channel instrument.