I came across one of your videos I was looking for how to use a Multimeter and it's from 12 years ago, I'm really happy to see that you're still teaching and explaining. May God bless you and thank you for all your help.
Agree with the 'Rabbit Hole' Title, Good description of the hassles involved in creating and checking specs. Well done on description of working through it and the potholes in the road to the solution. Bet the engineers who determined the published specs needed to navigate around a few potholes themselves. Much food for thought (lettuce?). Nice video.
MJ, I ALWAYS appreciate your candor and honesty in your videos! Thanks for a great tutorial and sharing in your journey with the generator and evaluating its phase noise. BTW, I have a Rigol SiFi version of the two port, phase signal gen.
The measurement techniques that you’re using measure a combination of phase noise plus the amplitude noise. Some applications are sensitive to both while others are mostly sensitive to only the phase noise component. That’s the driver behind he more sophisticated (and expensive) measurement techniques that can differentiate and measure the two separately.
MJ, I measured the PN at 10KHz offset on a professional PN test set. The PN at this offset is -134 dB for the UTG962E I measured. Other offsets 100 Hz (-87 dB); 1 kHz (-128 dB); 100 kHz (-133 dB). The reference used was a 10 MHz Morion ultra low PN block. The output level of the UT was set to 0 dBm. I can email you the plots if you want. I have plots for PN, AM noise and ADEV.
Look into using the phase detector method-it’s probably the most economical way to get good measurements. There’s a good chance that some of what you were seeing was AM noise which can often be easily confused for phase noise.
Reminds me of when I sold an HP vco/pll test set to BlackBerry in the 90's. Half the cost was the ultra clean source required to allow the measurements to happen.
Great video. I really learned a lot. So what would be the spec for the 962 given your method? BTW, I own one and like it and I suspect, it meets my hobbyist PN needs.
How does one go about troubleshooting electrical noise/ interference/ harmonic resonance on AFCI and AFGF circuits? I am an electrician and nuisance trips are kicking my butt. I know LED/under cabinet lights can interfere with appliances/ equipment even though they aren’t on the same circuit. In addition, they won’t trip the circuit until there is a load (compressor or vacuum for example) which makes it extremely hard to recreate the unique circumstances causing the nuisance trip. What kind of tools should I use; multimeter, oscilloscope or something else? What should I be looking for; a sign wave, frequency, amperage, etc.?
I quite like the UTG962 for quickly creating some waveforms, though it does create all kinds of glitches and undefined waveforms whilst adjusting the settings with the output on. My TTi TGA1244 behaves much better in that respect.
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I came across one of your videos I was looking for how to use a Multimeter and it's from 12 years ago, I'm really happy to see that you're still teaching and explaining. May God bless you and thank you for all your help.
Thanks very much for you post.
Agree with the 'Rabbit Hole' Title, Good description of the hassles involved in creating and checking specs. Well done on description of working through it and the potholes in the road to the solution. Bet the engineers who determined the published specs needed to navigate around a few potholes themselves. Much food for thought (lettuce?). Nice video.
Thanks for you post.
MJ, I ALWAYS appreciate your candor and honesty in your videos! Thanks for a great tutorial and sharing in your journey with the generator and evaluating its phase noise. BTW, I have a Rigol SiFi version of the two port, phase signal gen.
The measurement techniques that you’re using measure a combination of phase noise plus the amplitude noise. Some applications are sensitive to both while others are mostly sensitive to only the phase noise component. That’s the driver behind he more sophisticated (and expensive) measurement techniques that can differentiate and measure the two separately.
Thanks for your input.
Something for Dr. Shahriar , the signal path
MJ, I measured the PN at 10KHz offset on a professional PN test set. The PN at this offset is -134 dB for the UTG962E I measured. Other offsets 100 Hz (-87 dB); 1 kHz (-128 dB); 100 kHz (-133 dB). The reference used was a 10 MHz Morion ultra low PN block. The output level of the UT was set to 0 dBm. I can email you the plots if you want. I have plots for PN, AM noise and ADEV.
Look into using the phase detector method-it’s probably the most economical way to get good measurements. There’s a good chance that some of what you were seeing was AM noise which can often be easily confused for phase noise.
Reminds me of when I sold an HP vco/pll test set to BlackBerry in the 90's. Half the cost was the ultra clean source required to allow the measurements to happen.
Very nice , we miss you , back to business again ❤❤
Ta!
Great video. I really learned a lot. So what would be the spec for the 962 given your method? BTW, I own one and like it and I suspect, it meets my hobbyist PN needs.
How does one go about troubleshooting electrical noise/ interference/ harmonic resonance on AFCI and AFGF circuits? I am an electrician and nuisance trips are kicking my butt.
I know LED/under cabinet lights can interfere with appliances/ equipment even though they aren’t on the same circuit. In addition, they won’t trip the circuit until there is a load (compressor or vacuum for example) which makes it extremely hard to recreate the unique circumstances causing the nuisance trip.
What kind of tools should I use; multimeter, oscilloscope or something else? What should I be looking for; a sign wave, frequency, amperage, etc.?
Nice to see you ❤
I quite like the UTG962 for quickly creating some waveforms, though it does create all kinds of glitches and undefined waveforms whilst adjusting the settings with the output on. My TTi TGA1244 behaves much better in that respect.
Thanks for your valuable input good man. Noted in the review I'm about to post.
First!
First!