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EEVblog #384 - Agilent 4000X Oscilloscope Teardown

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nitro2k01:


It's subtle, but I noticed you kept the video speed-up going through the boot process. And it still feels like it's taking forever. :-DD

SeanB:
4 channel USB hub with one connected to the touchscreen.

kg4arn:
What's the switch for (S3400) @ 8:03?

OOPS  I see it now on the back panel of the scope.

JackOfVA:
Is the reason for a higher quality time base to improve the jitter, not overall frequency accuracy? The worse the clock jitter the more trace to trace dispersion - maybe not important at 1 MHz but at 300 MHz a cycle is 3.3ns, so a jitter of 33 ps would cause 1% trace to trace shift.

Or is there some magic software inside the DSPs that averages out or compensates in some other fashion for time base jitter?

Jack

ejeffrey:

--- Quote from: JackOfVA on November 14, 2012, 06:40:37 pm ---Is the reason for a higher quality time base to improve the jitter, not overall frequency accuracy?

--- End quote ---

Maybe they decided that since they were adding the 10 MHz out it would be embarrassing if a $20k scope had a really crappy reference output :)

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