Tindel

What else do you use the external trigger input for? in your experience

 

I suggest you wait until you have more experience using an oscilloscope.
When you need external triggering you will realize it.

Why on earth would you say something like this? The OP is just trying to learn something. If you don't feel like trying to explain it, then don't respond!

 

Tindel

What else do you use the external trigger input for? in your experience

Think of the external trigger just like a third input into your scope that doesn't display on the scope. I just use it when I need to see a couple channels but don't really care for seeing the third signal because I've already looked at it.

I've also used it to trigger 3 scopes at the same time so that I can see 12 channels at once! I didn't want to see the same trigger signal on each scope (wasting 3 channels and forcing me to needing an additional scope.) Triggering 12 signals at once is helpful to see startup / shutdown sequencing.

 

I've also used it to trigger 3 scopes at the same time so that I can see 12 channels at once!

So you convert 3 0-scopes into a logic analyzer

But what kind of signal can you use to sync up 3 scopes at the same time?

If you have are measuring time intervals or time duration , time periods

I have 3 scopes at works that are 2 channels only , but a lot of times i need it be like 10 channels to measure time periods of 10 different channels

How can I sync these 3 scopes up please? what kind of sync signal or signal do i need to use for the external trigger input?

 

Could not be more well said than that. I thought the video made that very clear. A scope is capable of so much more other than ext trigger.

Add a digital scope to your toolset and you get even more toys.

 

A clock signal should work in syncing your 3 scopes. But you'll only be able to see 6 total channels if you have 3 scopes that are each 2 channel. But you can sync all three scopes using your clock signal into the external trigger inputs.

 

So you convert 3 0-scopes into a logic analyzer

But what kind of signal can you use to sync up 3 scopes at the same time?

If you have are measuring time intervals or time duration , time periods

I have 3 scopes at works that are 2 channels only , but a lot of times i need it be like 10 channels to measure time periods of 10 different channels

How can I sync these 3 scopes up please? what kind of sync signal or signal do i need to use for the external trigger input?

This has already been explained ad nauseum. Hook ext trigger of each scope to common trigger and each channel of the scope to each output. With 3 scopes of 2 channels would get 6 channels to monitor.

You need to know what you are triggering off of. You have been given plenty of examples but the possibilities are endless.

 

What else can I use besides the clock signal? to sync up multiple O scopes?

 

Simply hook the ext trigger of each scope to a common trigger

What kind of use as a common trigger?

This is what i don't know

 

What kind of use as a common trigger?

This is what i don't know

How many times does it need to be explained? A clock signal is one example. Perhaps one of your outputs. Lots of things.. A trigger is what to triggers the sweep on your input channels.

 

How about:

A trigger signal is any signal or event that generates a signal that is synchronized with the signal or signals of interest.

 

A trigger is what to triggers the sweep on your input channels.

Yes I understand this

I just don't know what to use as a common trigger or what to use as a trigger signal for the external trigger input

Is you know so many, can you please list them so i can learn from it

List some common triggers or common inputs for the external trigger input for the O scope please

 

You trigger the scope with whatever is available to trigger the scope that is in sync with the signal you are interested in.

 

For example, you are trying to see 20μV noise at 60Hz line frequency.
If your scope does not already have 60Hz trigger option, then apply 60Hz line frequency to the external trigger input.

 

you are trying to see 20μV noise at 60Hz line frequency.

Why would you want to be looking for noise on a line frequency? its in microvolts why should that matter? it's not doing any harm right

 

Are you trolling for shrimp or what?

 

just trying to learn or understand what you're saying , cause i don't get it sorry

 

Why would you want to be looking for noise on a line frequency? its in microvolts why should that matter? it's not doing any harm right

Because I said "noise at line frequency" not "noise on line frequency".

If I am testing an amplifier and the signal in is 20μV and the noise is 20μV @60Hz surely it should matter.

 

I have the patience of Job and can outlast any of you guys.

 

just trying to learn or understand what you're saying , cause i don't get it sorry

Either you have no businesses getting anywhere near a scope or this is your idea of a joke. I think the later.