r/oscilloscope

▲ 11 r/oscilloscope+1 crossposts

Can oscilloscope triggering be used to reject jittered signals during averaging?

Please correct me if I should place my question in a different subreddit.

Hi there, I'm using a pulsed laser to illuminate a detector, and then measuring signal from detector on the oscilloscope. I use electronic "trigger out" from laser to position on my signal. Actual light pulse starts a little later after electronic trigger. However, some of my laser pulses are probably jittered, and not all them have equal spacing from the trigger. It can be seen as oscilloscope signal frequently starting at later time (signal jumps back and forth by ~1-1.5 ns).

My question is: is it possible to setup some more advanced triggering, so after triggering by electronic trigger, the signal would be acquired only when it starts at the correct time (to reject the rest of the jittered signals comming later than some starting point)? Maybe you have any other ideas for extracting correct unjittered signals? My goal is to average only the correct signals.

My scope is quite decent for my needs, but also quite old, and might not have some modern features (Keysight DSO90805A).

u/Low-Doughnut793 — 1 day ago
▲ 26 r/oscilloscope+2 crossposts

Oscilloscope & Other Old Equipment Available (South Jersey)

I bought a home two years ago. The previous owner worked for RCA for 40+ years. Electrical engineer. He left a bunch of equipment (and smaller doodads and whatnots). I do not want to throw it out, and I do not want to sell it on ebay. I wouldn't even know how to test them or ship them. If anyone is in the South Jersey/Philly area and would like to have a look, there may be a bounty of things in my basement you would be interested in. I understand they are worth some money but I'm not looking to get top dollar, I just want them to go to someone that will use and appreciate them.

u/BBQTartolini — 4 days ago

Anyone know what's causing this?

I just got this FNIRSI 2C53P yesterday and I've been dealing with what it's doing in the video and I have no clue what is causing it, I updated the firmware that is available on the FNIRSI website and it's still doing it

u/PomegranateBig1361 — 4 days ago

Looking for oscilloscope recommendations around £200.

Looking for a good oscilloscope around £200 for hobby electronics and power electronics work.
Any recommendations? Used models are fine too.

Thanks.

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u/Admirable_News4789 — 5 days ago

Found a old T912 and don’t really know anything about oscilloscopes is it working right?

I cant get it to stop flickering or going really fast and if you move the level knob it just turns off is what I have good?

u/Normal_Onion8070 — 6 days ago

Best cheap oscillscope for Arduino based sound?

I am doing a project in which I am using an Arduino to output sound. I would like to be able to be able to see the waveform to see how well it's working. I won't be trying to output audio at more than 24khz samples per second. What is a good cheap oscillscope? Is a 50$ handheld oscillscope+multimeter sufficent?

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u/ViolinistWaste4610 — 8 days ago

Is this broken? I’ve got this in my classroom and I’d really like to display some waveforms for students but I’m pretty lost when it comes to troubleshooting

I just want to display some wave forms but I can’t get anything to display. Is this repairable or am I just missing something obvious?

u/Gingerlyhelpless — 9 days ago

Tektronix 475

I was given this oscilloscope couple of weeks ago are they still serviceable as I dare not plug it in just it case it goes with a bang lol

u/stonedgees — 12 days ago

Came across this PC Scope!

Cam across this scope in a thrift store. Priced right at $2.00. Seemed fair. Took it home and went onto the Hankek website where I not only found the drivers for Windows 10 but also the application software that runs the scope. Fired it up and it works! Limited bandwidth but for the few times that I need a scope should work out just fine!!!

u/W0CBF — 11 days ago

Just bought this 2445

Picture is a bit fuzzy and from what I can tell it works. I also see that this radio I have must have been hacked up because holy is it flat topping and pinching the negative peaks, looks like Iv got my first project for this scope. Only one slight thing, I have no clue what I’m doin lol

u/jimmyy69420 — 11 days ago

Rigol MHO984 arbitrary waveform generator vs. standalone

Hey guys,

new here but I hope it's the right place to ask.

Initially I was in the market for a arbitrary waveform generator and eyed the Siglents (SDG2042X with license "upgrade" or SDG3082X). I currently run a Tektronix 2235 and I'm happy with it, does all I need, no laggy or buggy interface and buttons/knobs I can actually remember, but...

Then I noticed that the Rigol MHO934 ("upgraded" to MHO98 specs) that goes for less than 1k, has a 2 channel 100MHz arbitrary waveform generator integrated and, well I don't need a 1GHz scope, but if I get it for a few bucks on top of a waveform generator, I wouldn't say no.

So my question is, how does the integrated waveform generator of the MHO98 compare to, say a Siglent SDG3082X? Am I missing something or is this a crazy good deal? I mean, no I don't need a 1GHz scope (or a digital scope for that matter) but it would be a cool toy nonetheless.

Probably a stupid question but would be grateful for a helpful answer.

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u/Annual-Advisor-7916 — 12 days ago

Eliminating Common Mode Noise from Power Supply

Hi there,

I want to measure the output ripple from a buck converter I designed. I watched an EEVBlog video on how to measure power supply ripple, and I was thinking I would adapt it for my use case.

However, the video suggests using a differential probe and measuring it that way, but I don't want to spend a few hundred bucks to buy a differential probe.

I then had an idea, which I want some advice on its credibility.

  1. Hook up a normal probe to the power supply output (AC coupling)
  2. Hook up a normal probe to the buck converter output (AC coupling)
  3. Subtract the power supply ripple from the buck converter ripple

My main idea is that the ripple from the power supply would be transferred into the output from the buck. So if I subtract the power supply ripple, it would cancel out?

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u/EGMxGolden — 12 days ago