Dave investigates two very serious issues with jitter on the Rigol DS1000Z series oscilloscopes, including the DS1104Z and new DS1054Z Some sort of modulated sampling/trigger jitter problem at 5 microsecond intervals (the "5us jitter problem"). And severe jitter with the AC coupled trigger mode, a problem which is also present on the DS2000 series scopes as well.
NOTE: So many people have been confusing AC trigger coupling with AC input coupling people will be more familiar with. This issue has *nothing* to do with AC input coupling, it is AC trigger coupling!
Did you know you can use your frequency counter to detect gravity? You've likely done it before and you didn't even know it!
Dave demonstrates the phenomenon of 2g-tipover on quartz crystal oscillators in an Agilent 53131A frequency counter.
Related videos:
How a rubidium frequency standard works: https://www.youtube.com/watch?v=I55uLRRvLCU
FE-5680A Rubidium Standard Teardown: https://www.youtube.com/watch?v=FRdGsSu5Nec
Forum: http://www.eevblog.com/forum/blog/eevblog-646-gravity-detection-using-a-frequency-counter!/
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Trap for young players, beware of crap quality banana plugs!
Dave discovered his gold plated rotating spring leaf lantern style contact banana plugs are craptacular!
Forum: http://www.eevblog.com/forum/blog/eevblog-1052-beware-crap-banana-plugs!/
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Resultsw of the 2021 EEVblog survey. Thanks to everyone who contributed!
NOTE: The test equipment live prize draw will be on the EEVblog2 channel soon.
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Inside the Keysight U1461A Insulation Resistance Multimeter
Forum: http://www.eevblog.com/forum/blog/eevblog-894-keysight-u1461a-insulation-resistance-multimeter-teardown/
HY3131 datasheet:
http://www.hycontek.com/attachments/DMM/DS-HY3131_EN.pdf
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48 Hours left!
http://www.kickstarter.com/projects/eevblog/current-gold-precision-multimeter-current-adapter
Dave assembles and tests the first 10 Kickstarter uCurrent units.
The PCB's are from: http://project-pcb.com/
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Part 2 of the Fluke 23 multimeter repair by digging into the bunker meter archives from episode #84
Experimenting with alfoil
Part 1: https://www.youtube.com/watch?v=-9kNSR4ozT4
High energy Multimeter destruction: https://www.youtube.com/watch?v=M-FZP1U2dkM
LCD Technology tutorial: https://www.youtube.com/watch?v=mo4_5vG8bbU
Forum: https://www.eevblog.com/forum/blog/eevblog-1425-fluke-repair-2-electric-boogaloo/
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Part 3 of designing a better uCurrent series.
Measuring the noise and consumption of the OPA189 compared to the MAX4239 using a dynamic signal analyser and an oscilloscope.
How to measure opamp noise: https://www.youtube.com/watch?v=Y0jkPLuFdnM
Forum: https://www.eevblog.com/forum/blog/eevblog-1328-ucurrent-op189-measurements/
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#uCurrent #Design #Measurement
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What's inside a 10kW linear power supply for a Coherent Skylight 300C 10W Argon Ion Laser? Teardown time!
Daryl Tewksbury: https://theamphour.com/521-outdoor-laser-projection-object-mapping-with-daryl-tewksbury/
Forum: https://www.eevblog.com/forum/blog/eevblog-1381-10kw-argon-ion-laser-psu-teardown/
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