Clues Needed

[Ord Millar]

+/- internal - usually means triggers off the 50 or 60hz ac supply, either
on the rising or falling zero volt cross.  (could mean that the trigger is
extracted from the signal input in some cases)
+/- external - triggers off the the sense lead, either on the rising or
falling edge.  There should be a setting for level - whenever the input
voltages cross this level the scope makes a trace.
Auto - just triggers as soon as one h-sweep is finished.
When using a seperate trigger, hook it to something that's in sync with what
you want to measure - think of it like a timing light.

-----Original Message-----
From: Bruce Plecan <nacelp at bright.net>
To: diy_efi at esl.eng.ohio-state.edu <diy_efi at esl.eng.ohio-state.edu>
Date: Friday, May 21, 1999 11:05 AM
Subject: Clues Needed


>Being new to the scope world, and after reading a scope manual, I'm still
at
>a lose, and hope someone could clear these meanings up for me.
>  When using the triggering mode selection there are these options.
>Auto
>+ Internal
>- Internal
>+External
>-External
>Auto-seems to mean that the pulses are displayed as they occur, and the
>trigger
>  sense lead need not be connected.
>ALSO, for these 4 other options where would one hook the sense lead to.
>Any help here appreciated.
>Bruce
>     Happy used to, really chase the skirts.
>     But, having visited Scotland last weekend, has left him confused......
>
>