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How to trigger a combined signal
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tooki:

--- Quote from: RAPo on October 16, 2022, 02:31:49 pm ---
--- Quote from: tooki on October 16, 2022, 02:26:15 pm ---Can you link to the original magazine in question instead of a poorly-cropped low-resolution screenshot in which nothing can possibly be read? I can make out that it’s Popular Electronics, so it’s almost certainly available for us on worldradioarchive.

--- End quote ---
Here it is: https://worldradiohistory.com/Archive-Poptronics/90s/92/PE-1991-07.pdf

--- End quote ---
404 not found.

You sure about that URL?
RAPo:
I'm sure about: https://worldradiohistory.com/Archive-Poptronics/90s/91/PE-1991-07.pdf
(downloaded at my side).
RAPo:

--- Quote from: tooki on October 16, 2022, 02:57:09 pm ---It’s on page 63 of the catalog here: https://www.yumpu.com/en/document/view/5663030/electrical-machines-elwe-lehrsysteme . (Use the login from http://bugmenot.com/view/yumpu.com if you want to download the PDF.) 

The manufacturer went out of business and was bought up years ago by a company called LD Didactic, which is still around. They may be able to supply the manual. (They have a downloadable archive of manuals, but requires registration to download.)

--- End quote ---
ow wow, many thanks. My apparatus has the signal out channels at the back, the one you linked to has them on the right front side.
tautech:

--- Quote from: StillTrying on October 16, 2022, 02:45:13 pm ---"I'm trying to trigger on 1 channel (the yellow one),"

It should be possible to get some sort of temporary stable trigger on that yellow because Signal 3 always shoots up to Signal 1 giving a long +ve edge.
Perhaps move the trigger level away from the middle Signal 2 level, trigger on AC coupled, or add "Noise Rejection" to the trigger, can't think of much else. :)



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100%, this is the only edge to target but it must be done with Holdoff to prevent retriggering until the next same edge so a Holdoff of ~550us should work just fine.
Other smaller edges can be targeted in exactly the same way albeit with a more defined trigger level.
tooki:

--- Quote from: RAPo on October 16, 2022, 03:03:32 pm ---I'm sure about: https://worldradiohistory.com/Archive-Poptronics/90s/91/PE-1991-07.pdf
(downloaded at my side).

--- End quote ---
Ah! The first time around, you wrote “…/92/…” instead of “…/91/…”


--- Quote from: RAPo on October 16, 2022, 03:05:51 pm ---
--- Quote from: tooki on October 16, 2022, 02:57:09 pm ---It’s on page 63 of the catalog here: https://www.yumpu.com/en/document/view/5663030/electrical-machines-elwe-lehrsysteme . (Use the login from http://bugmenot.com/view/yumpu.com if you want to download the PDF.) 

The manufacturer went out of business and was bought up years ago by a company called LD Didactic, which is still around. They may be able to supply the manual. (They have a downloadable archive of manuals, but requires registration to download.)

--- End quote ---
ow wow, many thanks. My apparatus has the signal out channels at the back, the one you linked to has them on the right front side.

--- End quote ---
Still, it should work the same. Maybe they can get you the manual.
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