From Boxcar to OFDM: The Signal Theory You Actually Need (Without the Math)

#frequency #oscilloscope #SpectrumAnalyzer #electronics

https://www.youtube.com/watch?v=iL5ylKrsFYA

https://blog.gslin.org/archives/2026/05/14/13039/%e7%a4%ba%e6%b3%a2%e5%99%a8%e6%8e%a5-ups-%e7%9a%84-ac-%e8%bc%b8%e5%87%ba/

示波器接 UPS 的 AC 輸出

#ac #current #hardware #oscilloscope #sinewave #ups #wave

Testing UPS Output Waveforms

이 글은 사무실에 있는 여러 UPS(무정전 전원 공급 장치)를 오실로스코프와 프로그래머블 AC 전원 공급 장치를 이용해 출력 파형을 측정하고 분석한 탐구성 테스트 결과를 다룹니다. Eaton SMART1500PSRTNC는 순수 사인파 출력을 제공하는 반면, 저가형 APC BE750G는 모의 사인파를 출력해 민감한 장비에 영향을 줄 수 있음을 확인했습니다. APC BN1500M2-CA 모델은 일부 장비가 배터리 모드에서 비정상적인 파형을 보여 고장 가능성을 시사합니다. 테스트는 고전압 안전 문제를 고려해 절연된 AC 소스를 활용해 진행되었으며, UPS 전환 시 파형 변화와 지연 현상도 관찰했습니다.

https://www.lttlabs.com/articles/2026/05/12/ups-exploration

#ups #powerwaveform #oscilloscope #acsource #powerbackup

Show HN: WfmOxide a Rust parser (.wfm/.isf) with CLI and time axis

WfmOxide는 Rust로 작성된 고성능 제로 카피 파서로, Rigol과 Tektronix의 독점 오실로스코프 바이너리 파일(.wfm, .isf)을 빠르게 파싱한다. 메모리 매핑과 병렬 처리(rayon)를 활용해 Python 순수 구현 대비 최대 7배 빠른 처리 속도를 제공하며, NumPy 배열로 직접 데이터를 반환해 딥 메모리 데이터 파이프라인에 최적화되어 있다. PyPI에서 사전 컴파일된 휠로 배포되어 Rust 툴체인 없이도 설치 가능하며, CLI 도구도 함께 제공해 다양한 변환 작업에 활용할 수 있다. 모듈화된 구조로 새로운 장치 지원 확장도 용이하다.

https://github.com/SGavrl/WfmOxide

#rust #parser #wfmoxide #oscilloscope #numpy

Added some oscilloscope measured waveforms to my blogpost about the hc-sr04 ultrasonic distance sensor. Trigger pulse width was off from the expected width on linux. Ultrasonic pulses clearly visual as well

https://embeddedjourneys.com/blog/sensor-hc-sr04/

#embedded #hc-sr04 #debugging #oscilloscope

MeldaProduction’s MMultiAnalyzer multi-track analyzer on sale for $27 USD https://rekkerd.org/save-on-meldaproduction-mmultianalyzer-multi-track-analyzer/

#AAX #AnalyzerAndMonitor #AU #loudness #MeldaProduction #oscilloscope #PluginBoutique #Sale #VST

A while back I got a new digital 'scope. The one I'd been using was okay, but only 8-bit and had some other limitations. The vertical resolution was actually starting to make it difficult to get accurate-enough readings of some things I was working with.

The new one is 12-bit. That is likely to be better than I will ever need. I'm happy with it. Being several years newer (and a different brand) it brings some new #features to the table.

One is that you can use it as a digital logic analyzer - it can sample a whole lot of inputs (rather than just 4 analog channels) quickly if it only has to tell on from off. But you have to get a whole lot of #signals into the #scope before you can do that, so you need a #connector with a lot of pins/signals.

You could use something standard for this type of application (which is still going to be a limited-audience part), or a custom thing, but those options are expensive. So instead, if you're the manufacturer, you find a common (and therefore #cheap) #connector with lots of #pins, and you re-use that. Done and dusted!

They picked ... the HDMI connector. It's there at the bottom of the middle of the control panel. And in the manual is the prominent (not) warning:

> WARNING: Non-standard HDMI interface, Siglent device ONLY, or you will damage your device.

Yes, if you plug anything HDMI-related into this obvious #HDMI port, you will cause damage to your 'scope, or your other device.

#oscilloscope #DSO #MagicSmoke #BadUI #bang

Looking to turn my #Pico2 in a rudimentary #oscilloscope. Have been checking the ADC's samplerate and tried measuring an ultrasonic distance sensor's echo pulse. Not quite there yet, USB throughput is still a limiting factor.

https://embeddedjourneys.com/blog/pico-rudimentary-oscilloscope-1/