[neonixie-l] Re: OT: oscilloscope probes
There is a very informative channel on youtube, which teaches about various problems in electronics. This video mentions the earth-to-clip connection and shows the result of forgetting about it. I highly recommend watching his videos, you can learn much about safety while having a good laugh and bad examples. https://www.youtube.com/watch?v=sI5Ftm1-jik The earth-to-clip moment is at 2:25. I learned about it from this video and it seems it is a common knowledge that nobody teaches. W dniu wtorek, 5 września 2017 04:40:39 UTC+2 użytkownik gregebert napisał: > > The probes themselves cause few problems, especially when in 10X/100X > mode, because they generally present a high-impedance load on the circuit. > > Ground-clips/leads are what cause you nightmares and can lead you in the > wrong direction when debugging noise issues, including ringing. Be aware > that the ground-clip on a scope-probe can cause ground-loops thru the > power-line GND and back to your circuit if your power supply or anything > else connected to your circuit is also grounded to the power-line. There > are quite a few good articles on the web about probing in a noisy > environment. > > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/ea0566a1-5757-4b56-9a72-61fbec42d53c%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] Re: OT: oscilloscope probes
The probes themselves cause few problems, especially when in 10X/100X mode, because they generally present a high-impedance load on the circuit. Ground-clips/leads are what cause you nightmares and can lead you in the wrong direction when debugging noise issues, including ringing. Be aware that the ground-clip on a scope-probe can cause ground-loops thru the power-line GND and back to your circuit if your power supply or anything else connected to your circuit is also grounded to the power-line. There are quite a few good articles on the web about probing in a noisy environment. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/fc70ac76-ddb2-4785-b9ff-feaf845d4068%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] Re: OT: oscilloscope probes
Yes, my scope can calibrate probes. I was actually reading the manual this morning! I should probably set aside some time to go over it! -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/a39a4d9b-89cc-45e7-a34f-69b109a3bedd%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[neonixie-l] Re: OT: oscilloscope probes
As long as there is a standard BNC connector on your scope, just about any probe should work. I bought some cheap ones on ebay for about $10-$15 a few years ago, and they work fine. You wont need an expensive probe for 20Mhz; you do need to compensate the probe with a decent square-wave. Most, and perhaps all, Tek scopes will have a test-point on the front to compensate the probe for optimum performance (sharpest-edge on a square wave). Your scope may want to see a specific type of probe attached so it can automatically set 1X, 10X, etc but that wont affect the actual measurement. Using AC-coupling will allow you to zoom-in to the ringing. Be aware that the 430A has 100Msa/sec sampling. 20Mhz is well-below Nyquist-limit for a sinusoidal waveform, but not an outright glitch. Most ringing I've looked at is a damped-sinusoid so you should be able to do some good debug for your circuit. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to neonixie-l+unsubscr...@googlegroups.com. To post to this group, send an email to neonixie-l@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/0fb0e76f-a628-452c-ba77-721794feb6fd%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
