When doing a compression test with 2 traces (one trance on amp probe other on control wire on cop) I was getting an Erratic signal on the cop trace on control wire , not the on off signal I expected like described in ch1 page 16 video, what should my scales be set on and should I use a filter ?
Jonathan Haffer
The following user(s) said Thank You: aboudi.naddaf
I have seen some odd looking signals on the control wire of Nissan 3 wire COP but if you could attach a screen cap we could help you better. Other thing is the make sure the channel is on DC In terms of electrical interference the engine bay of a car is pretty noisey environment, coils, injectors, alternators, fans even fuse boxes even batteries put out a lot of electromagnetic noise so try and route your connections as far as possible away from these parts,
Filters are really best left for removing excess high frequency for example if you are doing a cranking compression and want to look at the low frrequency humps.
" We're trying to plug a hole in the universe, what are you doing ?. "
(Walter Bishop Fringe TV show)
The following user(s) said Thank You: Jonathan Haffer, aboudi.naddaf
