Products > Test Equipment

Siglent SDG1032 as bad as rigol DG812?

<< < (8/28) > >>

Mortymore:
Are you referring to some overshoot when the generator is turned OFF with the outputs still on, right?

It seems that it could happen depending were the square wave is caught at power off. Sometimes it doesn't happen, sometimes overshoots up, other down.







Anyway, I suppose that the ON/OFF output buttons serves a purpose, and that doesn't happen when they're used

EDIT: It would be so much easier for everybody if at least you had the trouble to proper stand your case with adequate description and images. After all you have the devices.

temperance:
That what you are seeing is probably a common mode transient caused by you switching of the function gen with the power switch. You will probably see the same signal even with the output disabled.

Infact, let me try that. Yes, it is a common mode transient caused by the almost infinity fast opening and closing times of mechanical switches.

@ eTobey

your problem has nothing to do with a language barrier. It's the non stop bashing. For example the tittle of this topic:

Siglent SDG1032 as bad as rigol DG812?

-You could state: Weird signal on SDG1032 output when switched on and off.
-In your post you explain in a proper technical way the problem. Instead you scream high and low, insult people and don't provide a proper context.

In the end after the dust has settled and it turns out to be your fault your next step is bashing the manual.

Go and think for a while where this common mode noise is coming from and why your scope is displaying this signal (You might learn something very valuable and something you might find useful one day). What are the rise and fall times of a mechanical switches?

EDit: something to make you think a little harder and to mess with your mind in a positive way:
connect a shorted probe to the signal gen BNC GND. Set the scope to something like 5 µs and 1 V div. normal trigger 0.5 V. Switch the function gen on/off a few times and observe what happens.

nctnico:

--- Quote from: temperance on May 18, 2024, 03:16:12 pm ---That what you are seeing is probably a common mode transient caused by you switching of the function gen with the power switch. You will probably see the same signal even with the output disabled.

--- End quote ---
It is too slow to be a common mode transient. Those are typically in sub-microsecond time spans. What you see in the screenshots is typical for less than optimal power-supply sequencing at power down.

2N3055:

--- Quote from: nctnico on May 18, 2024, 04:05:26 pm ---
--- Quote from: temperance on May 18, 2024, 03:16:12 pm ---That what you are seeing is probably a common mode transient caused by you switching of the function gen with the power switch. You will probably see the same signal even with the output disabled.

--- End quote ---
It is too slow to be a common mode transient. Those are typically in sub-microsecond time spans. What you see in the screenshots is typical for less than optimal power-supply sequencing at power down.

--- End quote ---

Except that nobody can reproduce it in such form.
And you that don't own that AWG (or even similar one) are making conclusions based on some scope images that are made God know how. Scope was sampling at 2Ms/s using Peak detect mode. Any high frequency would be sampled as outside envelope, not as base frequency..

I don't have SDG1000X either. But believe RF-Loops results, who made VERY comprehensive tests at the time. He knows it inside out.
If some specific test could be defined he could run it.

But the way I see it, whatever is on the scope screen has more to do with what and how was tested.
You and I might disagree from time to time but one thing I agree with you 100% is your signature.

OP should connect scope to an AWG directly, use full memory, maximum sample rate, and try then.
To exclude DUT, it's power supply, connection to computer ground via ICP connector etc etc..
When something is wrong, you reduce variables. Eliminate sources of confusion. Reduce problem complexity.

eTobey:

--- Quote from: temperance on May 18, 2024, 03:16:12 pm ---EDit: something to make you think a little harder and to mess with your mind in a positive way:
connect a shorted probe to the signal gen BNC GND. Set the scope to something like 5 µs and 1 V div. normal trigger 0.5 V. Switch the function gen on/off a few times and observe what happens.

--- End quote ---
I will do this, but only if you tell me, what you expect to see/happen.

And dont anybody else dare to answer this request!

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod