I've thrown a simple "breakout harness" together, to take a measurement. The measurement though is very noisy.
First a (attached) picture from a Tek 2246 (sorry, dark surroundings, a bright screen and a phone isn't the shit to make pictures) - I does not help to put the HF, LF or Noise reject on to the triggercirciut, which i don't understand 100%.
A pic from a DSO Nano (Yeah, i know
) The Nano just don't measure the correct voltage. At the Tek it's measuring approx. 13V
It should be a 1 KHz squarewave at ~12V (car battery voltage). As i can see, my only other option is to measure the output direct on the VN05 driver, to see if it is noisy too?
It is a Citroën Xantia Activa HA2 suspension controller. The load is a solenoid measuring 4 DC ohms.
My question is, can this little breakout-cable pick up so much noise? Why is the noise gone at the Nano?