Products > Test Equipment
Test Equipment Anonymous (TEA) group therapy thread
Saskia:
urgs fever still high. hubby started coughing. eff
@bd I could offer you a Keysight 3054t or a 2002 with MSO options, etc.
interested?
cyclin_al:
--- Quote from: Kosmic on June 24, 2022, 01:49:14 pm ---
--- Quote from: Cerebus on June 24, 2022, 01:25:46 pm ---
--- Quote from: Kosmic on June 24, 2022, 04:05:52 am ---Might be just us, but around here electricity is so cheap it would only make sense to install solar panels if you can't get connected to the grid.
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It is just you. Most of us in most of the rest of the world don't have "hydro" as part of the local power company name.
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I understand about the rest of the world but was wondering about USA. Probably depend of the state you live in. It's true that we are exporting a lot of electricity so it has to be more expensive over there.
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Even within Canada, I suspect that 25_CPS pays double for electricity what Kosmic and I pay ...
vk6zgo:
--- Quote from: tggzzz on June 24, 2022, 08:51:20 am ---
--- Quote from: bd139 on June 24, 2022, 08:22:01 am ---
--- Quote from: tggzzz on June 24, 2022, 07:58:11 am ---
--- Quote from: bd139 on June 24, 2022, 07:26:55 am ---
--- Quote from: tggzzz on June 24, 2022, 07:20:22 am ---l
--- Quote from: bd139 on June 24, 2022, 07:16:41 am ---
--- Quote from: tggzzz on June 24, 2022, 07:10:03 am ---
--- Quote from: bd139 on June 24, 2022, 06:59:36 am ---
--- Quote from: tggzzz on June 24, 2022, 06:52:42 am ---
--- Quote from: mnementh on June 23, 2022, 11:26:22 pm ---Naaahhh... you're not wrong. Characterizing noise is one of the areas that, IMO, a good analog scope still excels at and in many ways beats out a DSO. In this scenario, it does the averaging by dint of its inherent nature. You don't need the absolute detail that digitizing gives you; you just want to see where the fuzz is thickest and where it ends.
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Amaze youngsters by using an analogue scope to quickly and easily measure the RMS value of wideband noise.
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At amaze them with an HP 3400A which is even easier :)
Talking of which I need one of them to measure noise figure on something.
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OK. Go on. Do that by the end of the week, rather than at some indefinite time in the future :)
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Considering I don’t have any analogue oscilloscopes at the moment I shall defer until some indefinite time in the future :)
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A clear demonstration of how unwise it is to dispose of anything.
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Theres a compromise somewhere there.
Actually if I’m remembering how to do it properly it might be possible to do it with intensity grading or persistence on the Siglent. I will have to make a noise source and try it. After I’ve moved!
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Do try it and let us know the result. Obviously a simple max/min/mean trace won't help. If you can determine the right colour or intensity, you might not need to use the second channel.
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Indeed. Experimentation time.
I need a reference power measurement to compare it against. That might neatly line up with the Bird wattmeter thread :-DD
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As per my .sig, how about a noisy resistor, an audio amp, and a moderate quality multimeter. Plus the scope, of course.
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Back in the day, we used to determine blanking level noise on video waveforms with a magic Tek device ( I think it was part of a Tek 148), which blanked out a portion of the DOT noise & inserted a known source of noise, calibrated in RMS volts.
When the DOT noise was the same level as the inserted noise, the value of noise was the same as that of the inserted noise, read off a scale on the tester.
mnementh:
huh. :o
Only $4400...
https://www.3bscientific.com/us/experiment-training-oscilloscope-ii-115-v-5060-hz-8000671-ue3070850-115,p_1425_28447.html
mnem
Cubdriver:
--- Quote from: factory on June 23, 2022, 08:08:51 pm ---Interesting & slightly badly listed vintage DVM for those in the USA, cheap start price but could be expensive as it has a reserve. :-//
https://www.ebay.com/itm/295045755315
David
--- End quote ---
I took a crack at it, but the reserve was higher than my bid. Oh well - I have too many projects already!
-Pat
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