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8563E Unknown Fault

Question asked by k_purden on Aug 30, 2011
Latest reply on Aug 31, 2011 by tabbott

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Hi

I am experiencing problems with a 8563E spectrum analyzer. Upon startup, or whenever the unit is preset it shows a block of green above the noise floor, making the unit unuseable. The only way to rid the unit of this is to turn on the video averaging, but I would like to know why it is doing this.

See uploaded picture for what it looks like

Thanks in advance

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tabbott

Aug 31, 2011 8:54 AM

Hi -

It looks like your positive peak detector on the interface board has gone bad. If you go into the menu and select detectors and switch between sample negative peak and positive peak you will see the same effect on the positive peak selection .

Regards -

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tabbott

Aug 31, 2011 2:03 PM

Hello again -

A good peak detector will look like a thin-line version of a normal trace. A bad peak detector will be a straight line near the top of the screen, indicating the peak detector circuit is railed.

I hope this helped -

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tabbott Aug 31, 2011 8:54 AM
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Hi -

It looks like your positive peak detector on the interface board has gone bad. If you go into the menu and select detectors and switch between sample negative peak and positive peak you will see the same effect on the positive peak selection .

Regards -
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tabbott Aug 31, 2011 2:03 PM
Mark Correct
Correct Answer
Hello again -

A good peak detector will look like a thin-line version of a normal trace. A bad peak detector will be a straight line near the top of the screen, indicating the peak detector circuit is railed.

I hope this helped -
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8563E Unknown Fault

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