Hi All, I was having a play today, got here an old 1987 Merc 230, I selected, Ignition > Distrubitor > Secondary (king lead) and got nothing on the screen, it was only when I moved the trigger right down did I get an inverted waveform, is there anywhere I can click to invert the waveform & any idea why it was inverted ?

In the probe settings.  Just choose the inverted or positive probe, as needed. You had to pick one to set it up.
Didn't you notice it has two choices ?

drdiesel1 wrote on Mar 30^th, 2012 at 7:31am:

In the probe settings.  Just choose the inverted or positive probe, as needed.

Thanks for the info, I was using the auto-probe MI074 that came with the kit, do I need to select the:
secondary ignition probe (inverted)
everytime i use this ?

Thanks Again

liteace wrote on Mar 30^th, 2012 at 7:35am:

drdiesel1 wrote on Mar 30th, 2012 at 7:31am: In the probe settings.  Just choose the inverted or positive probe, as needed. Thanks for the info, I was using the auto-probe MI074 that came with the kit, do I need to select the: secondary ignition probe (inverted) everytime i use this ? Thanks Again

The true signal is what you're seeing.  Most standard ignition scopes invert the signal automatically. Pico gives the true signal and you do as you please with it.
I learned how to read ignition systems on an old Sun machine, so I like it inverted because that's what I'm use to. You can do whatever you like.
That's the beauty of a Pico  [smiley=smiley-dance013.gif]

As you say most of the other scopes Ive had appart from the fluke was all auto, so when plugging into a conventional ignition system you got the waveform on the screen and didnt have to touch anything, with the Pico Ive still got a lot to learn, i'll get there one day

Thanks for your help

liteace wrote on Mar 30^th, 2012 at 7:47am:

As you say most of the other scopes Ive had appart from the fluke was all auto, so when plugging into a conventional ignition system you got the waveform on the screen and didnt have to touch anything, with the Pico Ive still got a lot to learn, i'll get there one day Thanks for your help

Now you're learning  [smiley=thumbsup2.gif]

You're welcome too  [smiley=smiley-dance013.gif] If you look in the help section in the tool bar of Pico Scope, you'll find a wealth of information the will help you  [smiley=ok.gif]

I did look in the help section, help > search, typed in "invert" & "inverted" it only come up with maths channels & digital setup dialog, nothing about custom probes !

Thanks

Hi Liteace

Don't know if you looked at the 'automotive' option on the top toolbar.

This will give you options of ignition set ups

It gives a good starting point that you can tweak till you get what you like.

HTH

Iain

Hi Liteace,

first up, you are using the presets from the menu in the pico program.This isn't a good choice, they aren't ideal settings. Use the probes that in the channel menu instead. Here's a couple of pics to show you what I mean  ;)

The only good thing about the presets in the pico menu is the tutorials for each test.

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