Hi Again Yes, all quite valid thoughts and yes, all and more tried over the last 12 years of owning Pico kit! USB cable is USB3 Pico brand for the 4 series but others inc Pico USB2 and third party leads, only USB2 with the 3 series scope (does not have usb3 capability) but both scopes tried with a v...

Hi Yes, I agree completely and had the engine been running for the captures that we had the issue with I might have gone further to see if the timing matched spark or injector or indeed any other coil based device that might be EMF back feeding ... but this was an KOEO (ignition only) set of tests. ...

Hi e2e4 Sadly it's not just the floating ground versions of the Pico Automotive scopes, even the old 3series has the same issues. some of this is down to excessive sampling, so that can be dialed back, but it's not completely down to that alone, and much of what you say will indeed have an influence...

I think this is best answered by Steve Smith or someone else at Pico ... In my historic research, which included lots of guidance from the Pico boys, into the figures and calculations, I did not focus on this particular aspect, but I can say from the data I have that in basic terms it uses some or a...

Thanks FF That's great, just wanted to see if it was a 2.5v base with something in the Engine ECU chipset pulling up the voltage to the weird levels, or if this was some other "new" operational voltage level ... clearly it should be 2.5v, which is re-assuring! Hope the weather is good out there, we ...

Hi FF

Amazing how some tools/chipsets can read from a single channel, that itself seems to be beyond usable!

Fat Freddy wrote:Applied maths looks good.

Could not see any maths (or undisplayed Maths channels) ?!

Separately do you have a capture of the same when fixed, curious as to voltage levels

Thanks

Richard

I cannot see the amp clamp revealing any more Precisely, and tongue in cheek, I'm saying to you as I did on the Phone, AMPS is a very good way to pinpoint the fault, or more precisely which of the lines in this instance might be overloading the "sensor A" circuit, which feeds probably 1/2 or 1/3 of...

STC The amp clamps will give an idea of the type of fault and location, if there is a high amp event during the failure moment, then you could use that to trace where the fault is, in that where on the 5v output line it shorts to earth (not the ecu return path), or if the sensor is indeed the earth ...

Hi Martin A few things, just IMHO 1. The noise is probably from over sampling, try lowering the current setting of 1MS to say 40ks (10k per channel per buffer = 100 samples per second), which should be more than enough. We've had lots of issues from excessive noise on high sample rates. Also try run...

Hi Martin
Many thanks for this confirmation.

Will try to get a capture later today and share.

Thanks
Richard