Questions tagged [oscilloscope]
A piece of measurement equipment which can visualize one or more signals simultaneously on a time scale.
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Can I use a 50 Ω attenuator with a high-Z scope?
In my project involving the measurement of current using a Pearson current transformer, the instructions specify the use of high-Z (1 MΩ) oscilloscopes. Given the need to attenuate the signal, I have ...
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Weird readings on oscilloscope [closed]
Its my first time using oscilloscope, I was trying to read output from AS1117 on an Arduino board, and this is what I get.
I was expecting square wave, but its nothing like it. Am I doing something ...
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Measuring 240v 3-phase circuits with an oscilloscope
I have an injection molding machine that has some odd behavior* going on in it which I need to diagnose. I've probed around with a multimeter, but I think I need to understand deeper what is happening....
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How to determine delay of sensor response after the stimulus event (with oscilloscope?)
I’d like to determine how long it takes a digital sensor to go low after the stimulus event (Ir break beam). I have no problem getting a trace from sensor: I can see it start to drop, the slope, ...
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Why does an AC Voltage reading on a DMM decrease as the frequency is increased?
I'm doing an assignment for a lab and I've found that frequency doesn't affect the voltage reading of an oscilloscope while it does for a DMM. Online, it says this is because an oscilloscope displays ...
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A 555 timer changes time when you touch it?
I designed a simple 555 astable 50% duty cycle square wave generator, assembled in China on SMT PCB. It works well: Except when you touch it, or even put your fingers near it, the timing changes ...
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Measuring electric generator AC frequency
I need to measure the AC frequency of a 230 V electric generator (gasoline powered).
I have a cheap but ok multimeter that does Hz but the reading is erratic (some 1 kHz...)
The reading on the mains ...
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How can I confirm the presence of an HDMI signal with a slow scope?
Per the title, I'm trying to troubleshoot a circuit and confirm if a device is putting out an HDMI signal but I only have access to "slow" (<=200MHz) oscilloscopes.
I don't need to know ...
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Oscilloscope showing weird AC wave on DC [closed]
I recently bought an oscilloscope and to test it I tried hooking it up to an Arduino.
Using the following connections:
Arduino 5V -> Scope 1
Arduino GND -> Scope 2
The Arduino itself is powered ...
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Connecting LVDS to oscilloscope using ferrite bead to isolate GND/SHIELD
I want to measure LVDS signals with a scope.
Will my solution work? (Shown at bottom.)
I know of other ways of doing this, but I am hoping this way is cleaner and easier.
Specs:
Frequency:~100MHz
...
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What to do with oscilloscope ground clip in a PC powered prototype board
I have a Cypress PSoC PL5 prototyping board. It has pins on the bottom which allow it to be mounted on a breadboard so that you can connect things to the GPIOs or ADCs. It gets its power from the ...
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How to Inject Noise into a DC Power Supply with a Function Generator
I am trying to test a filter I have designed on a PCB which aims to minimize the noise of the input power supply. To do this, I need to have a noisy power supply. I currently have access to a benchtop ...
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DS1102E oscilloscope not triggering above 200mV
Once adjusting the vertical scale of my Rigol DS1102E oscilloscope from 200mV to 500mV the signal appears to be lost. Instead of showing the "T'D" (triggered) icon in the top left it then ...
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Keysight vs Tektronix: AWG+RT SigAn or VSG+RT Oscilloscope?
I'm evaluating some new RF hardware for one of my university's research labs, for antenna testing. We are between a Keysight vector signal generator and a real-time oscope versus a Tektronix AWG and a ...
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Difference in voltage level using different probes [closed]
I have used an active probe and a passive probe to do the same measurement at the same site. However, the active probe has measured a lower voltage than the passive probe under DC coupling measurement....
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X-Deflection broken on C1-5 oscilloscope?
I recently acquired a C1-5 soviet-made oscilloscope in unknown condition that has been sitting in a workshop for 18 years. I was not able to find a manual.
When turning it on (y-input and x-input ...
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Button switch input signal reading was higher than VDD value at some point
I was monitoring a signal output from a button during debouncing on my oscilloscope and surprisingly as you can see in the image, the signal peaked at 5.92 volts and then went back to the VDD value ...
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Oscilloscope Signal Probing [closed]
I am using active differential solder-on N5382A Keysight Probe and found voltage drops on the signal. Is it caused by open drain signal. It is working fine with passive probes. The signal being tested ...
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Unstable oscilloscope reading in LC Tank circuit
I'm very new to LC circuits and signal generators but I would like to learn more about them. I have a capacitor which I do not know the exact value. But it is in the range of pF. Therefore I decided ...
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Understanding ripple in oscilloscope
I have a linear (non-switched) power supply that states in the specs a ripple of 10 mV p-p
Measuring it with the oscilloscope, as you can see in the image it measures Vpp = 30mV.
The oscilloscope is ...
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Connecting oscilloscope probe ground clips to virtual ground
As I have learned, the TT earthing system is primarily used in our country.
My power source is an unregulated AC/DC adapter. A transformer and a full bridge rectifier circuit are typically found in ...
user211748
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How does input impedance of oscilloscope affect circuit?
I am taking circuits 1 lab and we are learning with oscilloscopes right now. Apparently the input impedance of the oscilloscope can affect my circuit. I am most specifically interested in how it ...
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How should I store my oscilloscope and probes
What are the best practices for storing an oscilloscope and probes?
Should the probes be disconnected after use, etc.?
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LTspice simulation doesn't match oscilloscope measurement; is the circuit diagram correct?
This box should add DC offset to a resonant circuit. I drew the simulation on LTspice. However, it's not similar to the result in oscilloscope. So, my question is: Is my circuit diagram correct?
#1 ...
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Will I see a sine wave if I connect one oscilloscope terminal to the phase and another to the earth?
I have a doubt regarding a thought experiment I am conducting since I lack access to proper grounding at both my workplace and my house.
The experiment involves the following setup:
I intend to ...
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What adapter or probe will reduce my oscilloscope bandwdith (or rise time)?
I would like to make my 300 MHz oscilloscope behave more like a 50 MHz oscilloscope. What sort of a BNC adapter or probe would let me do this?
Specifically, I am interested in modifying how different ...
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Tektronix 453 - Time/Div dial has no effect
I recently picked up a Tektronix 453 Oscilloscope and it works pretty much flawlessly, but turning the time/div dial (the clear plastic flange) does nothing to the display. I tried hooking up CH 1 and ...
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Measuring Differential mode HF on mains with oscilloscope
I want to measure Differential mode HF 9kHz to 100kHz with 3dB accuracy on my 230V 50Hz mains. Is the following concept good?
Let's imagine a first-oder high pass filter with its entry voltage U_e ...
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What causes of multiple simultaneous oscilloscope traces in single channel?
Observing three simultaneous signals on a single channel - 802 Hz, 1161 Hz, and 1714 Hz sine waves - yields the following oscilloscope output:
Expected is a single line, but multiple fluctuating ...
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A question about scope's channel affecting other
I have the Digilent's USB scope and when I couple different signals to Ch1 And CH2, the channels affect each other. I didn't observe this with another USB scope.
If both are coupled I get the ...
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Why do oscilloscopes list max bandwidth separate from sample rate?
I would figure that if a scope has a sample rate of 200 MSa/s, it should be able to measure signals up to its Nyquist frequency, 100 MHz. But there are a lot of scopes whose max bandwidth do not match ...
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Hantek DSO2C10 measuring sawtooth wave
We recently bought an oscilloscope.
There is no signal generator on it.
I tried to do some tests to make sure that the scope works correctly.
Initially I tried to generate a square wave signal of 8 ...
user211748
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INA333 strange output, it's the same w/ and w/o input
This is the EOG (Electroencephalography circuit I'm working with)
The output is essentially noise when I hook up the electrodes to myself, hence I'm debugging each stage, hooking up to an ...
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Oscilloscope probe attenuation setting
I am trying to use a differential probe that has attenuation setting of 50X and 500X. However, my oscilloscope only has 1X, 10X, 100X, and 1000X. Would it cause any issue if there's a mismatch between ...
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How do I sweep across pins with scope probe for signal without bricking the scope?
Solution: Using the auto set feature on the FNIRSI 1013D oscilloscope without a voltage across the probe leads (i.e., shorting gnd lead to signal on the probe) will brick the scope.
I was recently ...
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Why is my oscilloscope showing noise when I short both terminals of the probe and connecting them to any metal surface?
My understanding that when the terminals of an oscilloscope probe are shorted, the voltage level shown should be around zero.
Today, in my lab, I shorted both terminals and then connected the probe to ...
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Genesis ROM + Level Shifter Circuit: Game Fails Without O'scope Probe
Problem:
In an effort to learn digital electronics, I've designed and had fabricated a modern Sega Genesis cartridge. But I'm having a problem getting the cartridge to work without the help of an ...
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Understanding connection of floating function generator to oscilloscope
I'm working with a function generator that has a floating output. At one point, I looked at the signal on both the center conductor of the BNC connector and on the shield of the BNC connector relative ...
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Why does my square wave signal from an Elegoo Uno R3 have 3V overshoot/undershoot?
I've just purchased my first oscilloscope, a Siglent SDS1202X-E, and am experiencing an issue with a square wave signal generated from an Elegoo Uno R3 board. I've calibrated the probes, and I'm quite ...
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BLDC motor - strange phase waveforms
I trying implement bldc motor driver based on below schematic.
The color circles on schematic correspond to waveforms from oscilloscope (all probes are connected to common GND of MCU and PSU that ...
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What is the name of the oscilloscope-like software shown in this screenshot?
I'm trying to figure out what this tool is, to use it as an oscilloscope. I found it here.
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How can I find the time period for two sine waves using the oscilloscope in Multisim?
The formula for calculating the phase difference requires a time delay and a time period which is given in the formula:
Φ = td/tp × 360
Where ...
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Differential amplifier and modulation
I conncected this differential amplifier circuit:
The input V1 was 50mV,5kHZ and V2 was grounded
When I measured the output VO1, the oscilloscope gave me a weird signal that was not sinusoidal but ...
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Making measurements with oscilloscope on vehicle when earth and ground are common
I'm trying to make a small system that reads my engine data on my old bus.
I've used an LM1815 and to be sure, I've checked the input signal and output of the lm1815.
I've placed my probes and ground ...
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Measuring peak voltages on two resistors in series using an oscilloscope [closed]
A circuit consisting of a function generator that produces a sinusoidal voltage, and two resistors R1 and R2 connected in series is set up according to the image. An oscilloscope is used to measure 3 ...
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Oscilloscope front end - over voltage protection
I have been looking around at different front end implementations for a DIY oscilloscope and came across a variant that I found simple enough as a starting point.
I have a question about protecting ...
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Pots in an old Tek 2205 Scope change when wiggled
I have a Tek 2205 scope I picked up from Ebay. Thing is fully functional except I had to replace the pot for the trace rotation. I'm going through a calibration procedure.
I've cleaned all the pots ...
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Help for identifying an oscilloscope [closed]
I'm trying to identify an oscilloscope used for anything related to power management, cellular, and chips. Here are two pictures of the oscilloscope.
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What causes the trough of a sine wave to become sharp?
I am using a white LED to send a 5 V p-p: +2.5 V to +7.5 V, DC offset of 5 V, sine wave of frequency 1 kHz as shown in the transmitter circuit. The current generated by the photodiode is converted to ...
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50 Ω or high-Z setting on waveform generator?
I have an arbitrary waveform generator that allows me to set the load as 50 Ω or high-Z.
This generator is connected to an amplifier that has as input an unbalanced BNC connector, 10 kΩ, single-ended.
...
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