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TDS3000 TDS3034B Excessive offset before warmup?

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msdaniel924
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Joined: July 5th, 2018, 2:15 am
Country: Great Britain

TDS3000 TDS3034B Excessive offset before warmup?

Post by msdaniel924 » July 5th, 2018, 2:30 am

Hi,

I recently acquired a second-hand TDS3034B which shows quite large errors during warmup. The screenshot shows the offset recovery during warmup at 10 secs per division. Channel 2 is almost a volt out at switch on, although this is at the worst case vertical setting of 1V per division, higher sensitivities have much less offset.

http://dl.dropbox.com/u/8977728/TEK00007.PNG

After a warmup of 5 mins or so, the offset is negligable and Signal Path Compensation passes. Amplitude measurements are good over a wide frequency range.

Can someone put my mind at rest and tell me this is normal !?

Cheers,

David N
Tektronix Applications
Tektronix Applications
Posts: 525
Joined: July 31st, 2008, 8:26 am

Re: TDS3000 TDS3034B Excessive offset before warmup?

Post by David N » July 10th, 2018, 11:02 am

For performance verification the service manual states: "The oscilloscope must have been operating continuously for ten minutes in an environment that the meets the operating range specifications for temperature and humidity."

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