Can you post the .psdata file
or a screen shot of the properties so we know the sample rate
Views -> View properties

Benno

The scope can not put out a higher voltage.
Then you need to amplify.
Or use an external generator.
I use the following external generator
https://aliexpress.com/item/1005004050858944.html
It can go up to 20V top top.

Benno

Scopes only measure voltages and not current. If you want to measure current then you need to use a current clamp or a shunt in your circuit. https://circuitdigest.com/electronic-circuits/how-to-measure-current-with-an-oscilloscope If you mean what leakage current will run to the scope when you meas...

Ary you using separate threads (1 for reading data from the SDK) and an other for doing the FFT calculations ?

Benno

the SDK streams the data in chunks of various size depending on the pc speed and cpu load.
So you have to make the ringbuffer yourselves (simple buffer of 30 MSamples (60 MB)) and an integer that increases every chunk of data from the SDK with the size of the data from the SDK.

Benno

ok then I would use a ringbuffer of about 25 - 30 Msamples and loop it in streaming mode as in previous post. Then you can take the last 10M samples at any moment in time by taking the most recent 10Msamples from the head index down (and loop to the end at 0) In that case if your FFT is fast you can...

What sample rate are you planning on sampling (no of samples per second) I usually use a single ring buffer with a head and tail index. Scope is wring incomming samples at the head index. and increases the head index after the write (loop around at the end) And 2nd thread reading the data from the r...

You should expect the min and max values on the right to represent the correct values. The goal was to have a quick detection of the biggest and the smallest time between the up and down switches. For deep measure you need to sort on the timing and you only have the complete cycle not the high time ...

below psdata file

https://www.ans-net.nl/picotech/2024011 ... red.psdata

With the rules I measure 34 ms and the measuring give 10 ms.

Benno

If you do a low pass filter of 20kHz then you even can go to -3 mV but you wont get the positive only pulses. And if possible set the sensitivity to +/- 100 mV for the counting pulses the overvoltage is no problem in your data the 8bit ADC noise is a far bigger problem. P.S. if you export the data t...

If you want to do it for all 3 phase at the same time you need at least a 6 channel scope. So that leaves only 1 option the 4824A You will need additional 3 HV differential probes (normal 1:100 probes are not safe for mains measurements) You need 3 or 4 current transformers or current probes (4 th i...

It looks like the problem is the pulses are not symmetric High = 102us = 9800 Hz Low = 106us = 9400 Hz
I don't have the RS232/485 specs in my head what the variation is allowed in these timings.
But somehow the picoscope software is very picky about the bit timing and missing te start bits.

Benno

He is sampling at 500kS / sec so it is 50 samples per bit
This should be enough.

P.S. I misunderstood the downsampling. why is that ?
is this also true for CAN bus ?

Benno

yes you can save it as a .pssettings file and then double click on it to open picoscope with that settings.

Benno

Any news on this, the problem still exists in the latest version.

Benno