Author Topic: How to trigger a combined signal  (Read 3259 times)

0 Members and 1 Guest are viewing this topic.

Offline tooki

  • Super Contributor
  • ***
  • Posts: 13157
  • Country: ch
Re: How to trigger a combined signal
« Reply #25 on: October 16, 2022, 02:59:40 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.
Here it is: https://worldradiohistory.com/Archive-Poptronics/90s/92/PE-1991-07.pdf
404 not found.

You sure about that URL?
 

Online RAPoTopic starter

  • Frequent Contributor
  • **
  • Posts: 858
  • Country: nl
Re: How to trigger a combined signal
« Reply #26 on: October 16, 2022, 03:03:32 pm »
 

Online RAPoTopic starter

  • Frequent Contributor
  • **
  • Posts: 858
  • Country: nl
Re: How to trigger a combined signal
« Reply #27 on: October 16, 2022, 03:05:51 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.)
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.
 

Online tautech

  • Super Contributor
  • ***
  • Posts: 29810
  • Country: nz
  • Taupaki Technologies Ltd. Siglent Distributor NZ.
    • Taupaki Technologies Ltd.
Re: How to trigger a combined signal
« Reply #28 on: October 16, 2022, 06:24:31 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. :)


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.
Avid Rabid Hobbyist.
Some stuff seen @ Siglent HQ cannot be shared.
 

Offline tooki

  • Super Contributor
  • ***
  • Posts: 13157
  • Country: ch
Re: How to trigger a combined signal
« Reply #29 on: October 16, 2022, 08:08:30 pm »
I'm sure about: https://worldradiohistory.com/Archive-Poptronics/90s/91/PE-1991-07.pdf
(downloaded at my side).
Ah! The first time around, you wrote “…/92/…” instead of “…/91/…”

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.)
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.
Still, it should work the same. Maybe they can get you the manual.
 
The following users thanked this post: RAPo

Online nctnico

  • Super Contributor
  • ***
  • Posts: 28429
  • Country: nl
    • NCT Developments
Re: How to trigger a combined signal
« Reply #30 on: October 16, 2022, 09:16:53 pm »
If you want to trigger separately on 3 or 4 channels there's no way to do that, there's no analogue ALT like option. All the sampling and displaying timing is locked to the one trigger channel so you can't stabilize different frequency inputs.
That is not entirely true. Some DSOs (some models from GW Instek for example) offer alternate triggering. In that mode the DSO triggers on each channel seperately. Now this won't give you an image where the signals are correlated (as in sampled the same time) but it does allow to put stable signals on screen which have no synchronisation between eachother. This can be handy every now and then.
« Last Edit: October 16, 2022, 09:22:10 pm by nctnico »
There are small lies, big lies and then there is what is on the screen of your oscilloscope.
 

Offline StillTrying

  • Super Contributor
  • ***
  • Posts: 2850
  • Country: se
  • Country: Broken Britain
Re: How to trigger a combined signal
« Reply #31 on: October 16, 2022, 11:33:00 pm »
Some DSOs (some models from GW Instek for example) offer alternate triggering.

I know, :)  my CML+ does ALT with 2 separate triggers and timebases.
https://www.eevblog.com/forum/testgear/siglent-cml-firmware/msg1177621/#msg1177621

But not the  https://www.batronix.com/files/Rigol/Oszilloskope/MSO5000/MSO5000_UserGuide_EN-V2.0.pdf
.  That took much longer than I thought it would.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf