Author Topic: DS1074Z zoom bug?  (Read 2331 times)

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Offline mayor

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DS1074Z zoom bug?
« on: May 31, 2014, 01:43:22 am »
I have a square waveform, which appears fine until I zoom in below 200mV. Has anyone else seen this? The attached shows 500mV/div, but the odd one is after zooming in to 200mV and stopping capture, then going back to 500, for comparison to the running 500.

Anyone?
 

Offline Hydrawerk

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Re: DS1074Z zoom bug?
« Reply #1 on: May 31, 2014, 02:04:12 am »
I am not sure but isn't this caused by oscilloscope overdrive? This is a common problem or feature of most scopes. http://cp.literature.agilent.com/litweb/pdf/5989-0068EN.pdf
Amazing machines. https://www.youtube.com/user/denha (It is not me...)
 

Offline mayor

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Re: DS1074Z zoom bug?
« Reply #2 on: May 31, 2014, 09:01:31 am »
I am not sure but isn't this caused by oscilloscope overdrive? This is a common problem or feature of most scopes. http://cp.literature.agilent.com/litweb/pdf/5989-0068EN.pdf

 :palm: ...thanks.
 

Offline jimjam

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Re: DS1074Z zoom bug?
« Reply #3 on: June 02, 2014, 05:19:44 pm »
How are you liking the DS1074Z so far?
 

Offline max666

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Re: DS1074Z zoom bug?
« Reply #4 on: June 02, 2014, 06:44:12 pm »
I tried to reproduce your waveform on my DS1074Z, but wasn't able to get that result. I'm happy to try again, if you can provide more detail on what exactly you do, to get that waveform.

But I'm inclined to agree with Hydrawerk, I too think this feature might be caused by overdrive.
EDIT: Although you're looking at a 1.15kHz signal, so recovery time should be way quicker than what we see. Maybe it is a zoom bug.  :-//
« Last Edit: June 02, 2014, 06:53:23 pm by max666 »
 

Offline tom66

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Re: DS1074Z zoom bug?
« Reply #5 on: June 02, 2014, 09:27:34 pm »
This isn't a bug, and it happens with many oscilloscopes. By setting the gain that high, you are overdriving the input amplifier so it behaves poorly. It's not harmful but can cause confusing results. There was a thread about this on the 2000X Agilents too, iirc.
 

Offline alexwhittemore

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Re: DS1074Z zoom bug?
« Reply #6 on: June 03, 2014, 06:36:16 am »
I tried to reproduce this too but had no luck. If anyone comes across a set of conditions that seems repeatable, I'd love to hear about it.
 


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