Skip to main content

Questions tagged [oscilloscope]

A piece of measurement equipment which can visualize one or more signals simultaneously on a time scale.

Filter by
Sorted by
Tagged with
1 vote
2 answers
74 views

Understanding dBm value of FFT measurements

I am getting familiar with the FFT functionality of my oscilloscope. I am using a Siglent SDS2204X Plus that has been firmware upgraded to 350 MHz. Testing of the FFT function involves the use of a ...
mike's user avatar
  • 137
0 votes
1 answer
48 views

How to Read Unipolar Square Waves on TRMS Multimeter

I'm trying to switch from reading my high-voltage unipolar square wave signal from a benchtop oscilloscope to a handheld multimeter, but I don't understand why my multimeter is giving the voltages it'...
asyndeton256's user avatar
-1 votes
0 answers
46 views

Good Oscilloscope for Power Electronics [closed]

Hoping to get recommendations on a good oscilloscope for testing power electronics in the 20W-240W range. My main use case will be to troubleshoot AC/DC power supplies. A specific need I'm concerned ...
Perry's user avatar
  • 1
0 votes
1 answer
67 views

Driving 50 Ω coax cable for doing measurements with oscilloscope

This is a follow up question to Using 50 Ω coax cable instead of passive probe. In the linked question I asked whether it would be possible to use a 50 Ω coax cable instead of the passive probe for ...
Marco's user avatar
  • 1,019
6 votes
4 answers
742 views

Using 50 Ω coax cable instead of passive probe

Preface, why am I asking this question? Instead of using a passive probe with a ground clip, I want a more "permanent" and reliable connection for my measurements. Note: I'm not talking ...
Marco's user avatar
  • 1,019
2 votes
0 answers
79 views

How does one find out if a multichannel digital oscilloscope is doing real time sampling?

By "real time" I mean the time interval between samples is not subject to jitter. Economies of hardware design may cut corners and allow asynchronous access to sample memory and other ...
James Bowery's user avatar
1 vote
0 answers
31 views

Tektronix 2000B series oscilloscope trigger not triggering camera

We have a Shimadzu high speed camera connected to a Tektronix oscilloscope. We got a new cord for the force sensor and since that point the camera has not been triggered correctly. It used to be that ...
helpoatmeal's user avatar
0 votes
0 answers
81 views

Why is my oscilloscope math mode showing an RMS voltage in gigavolts (unexpectedly high value)

I'm experiencing an issue with my Rigol DS1202 oscilloscope. When using the math function to measure the RMS voltage of the difference between two channels (A - B), the RMS value is displayed in ...
raymysterioso's user avatar
0 votes
1 answer
53 views

Why would changes in the impedance of a transducer affect the voltage displayed on the oscilloscope?

In my setup, a function generator is connected to an amplifier that drives a transducer. The amplifier output is connected to both the transducer and an oscilloscope via a tee connector. I do not ...
UltrasoundNeuro's user avatar
0 votes
2 answers
49 views

Bridge Tied Load Amplifier Measurement - Oscilloscope Probe Ground Reference

Apologies, my electronics is a little rusty. Wanting to measure the output of an bridge tied load amplifier and getting a little confused as what to use as the ground reference signal for the ...
user avatar
0 votes
3 answers
88 views

Why is my encoder showing abnormal spikes on the oscilloscope readings? Any suggestions on what might be causing it?

So to summarize, I have these winch drives that I've put together. One of them went berserk during testing and now I'm diagnosing the problem. I have attached an oscilloscope to where the KEB servo ...
Brandon Ringfield's user avatar
2 votes
2 answers
303 views

Is there anyway to estimate the time average power without knowing the power factor?

I am driving a transducer with a function generator connected to an amplifier. I need to work out the time average power entering the transducer for safety reasons. I understand it can be calculated ...
UltrasoundNeuro's user avatar
0 votes
1 answer
83 views

Oscilloscope Low Sampling at uHz Sinus Signal

I tried to measure a sinus signal at 1000 µHz with my R&S RTC1000 oscilloscope (bandwith 300 MHz). The function generator that I used was the EDU33212A. I set the T/div=100s and the oscilloscope ...
DarkKnight's user avatar
0 votes
2 answers
65 views

Dedicated ground vs power cord ground?

So my Siglent 1104X-E oscilloscope has no dedicated ground- it uses the power cord's ground. My Siglent function generator has a dedicated ground (screw terminal with banana plug option). Obviously I ...
Rahman's user avatar
  • 51
1 vote
4 answers
72 views

Can differential probes be used with floating oscilloscopes, such as handheld/tablet scopes?

I am in the market for a differential probe (and possibly a handheld oscilloscope down the track for field work). One seller I came across has a warning for many of the probes that they sell saying &...
daviegravee's user avatar
0 votes
1 answer
57 views

Oscilloscope slow sampling with GPIB

I have a 12 GHz oscilloscope with a 40 GSa/s sampling rate from Keysight, and I have a National Instruments GPIB-USB-HS with it. Sampling for 30 seconds with no averaging of data, it only gives 20 ...
science enthusiast 's user avatar
0 votes
1 answer
45 views

Function Between Oscilloscope Trigger and Sampling Storage

I have a query where maybe is stupid but anyway I will dare to ask. How the oscilloscope knows when to start to save the sampling data in his RAM memory in order to process them and display them? I ...
DarkKnight's user avatar
0 votes
2 answers
82 views

How to properly trigger and measure a modulated square wave signal with an oscilloscope

I'm having trouble getting a stable trigger on my Rigol DS-1202 oscilloscope for a complex waveform. The waveform is composed of a 25.5kHz carrier square wave modulated by a 200Hz square wave, both ...
raymysterioso's user avatar
4 votes
1 answer
80 views

Photodiode Signal Temporal Broadening Below Saturation

I'm a physics PhD student working on a project to use silicon photodiodes for detection of longwave infrared (6-10um) ultrashort pulses. (Specifically doing higher-order autocorrelation) Despite ...
UltrashortGiraffe's user avatar
2 votes
1 answer
181 views

Partially nice waveform on debugger pin

I am looking at the waveform on my SWDIO pin during programming and most edges look very nice, but some do not. Is this likely to be problematic? What are probable causes?
Alexander Ohm's user avatar
0 votes
1 answer
91 views

Oscilloscope Total Record Samples Vs Signal Frequency

I have the oscilloscope R&S® RTC1000 at 300MHz / 2GS/s / 500Mpts (Mega Points) with 12 horizontal divisions on the screen. 1st Example: If I have a signal 1Hz the total samples that the ...
DarkKnight's user avatar
0 votes
1 answer
68 views

Troubleshooting an RF driver for acousto-optic deflectors [closed]

I inherited an old acousto-optic deflector scanner but the catch is that one axis isn't working, and I want to troubleshoot why. These acousto-optics deflectors are powered by an RF driver and that's ...
Omnistic's user avatar
1 vote
0 answers
55 views

How to debug a noisy oscilloscope

I've had an inexpensive handheld integrated digital oscilloscope for close to a year, and used it well on various projects. It's been on the shelf for 6 months, and the signal I get now is very noisy,...
SRobertJames's user avatar
  • 1,119
1 vote
1 answer
89 views

How are oscilloscopes able to fill DDR SDRAM memory without interruptions from memory refresh?

From the many teardown videos, it is clear that modern oscilloscopes mostly use DDR memory. But this memory needs to be refreshed periodically. Which should interrupt the data stream. I understand ...
Dmitry's user avatar
  • 23
1 vote
3 answers
109 views

How to match multiple impedance discontinuities?

I am trying to design a circuit to transmit various digital high frequency signals over cables, connectors and pcb to an oscilloscope. The simplified circuit looks like this: simulate this circuit &...
Robert's user avatar
  • 49
0 votes
0 answers
13 views

question about pir sensor lhi878

I am conducting an experiment with the Lhi 878 sensor, and when I input 5V, the output is connected to an oscilloscope without any significant load. The output is detected around 1V within a range of ...
Akak Uwu's user avatar
1 vote
0 answers
14 views

How to display Wavegen output along with the scope, in AD2 using Waveforms?

I have an Analog Discovery 2, and am using it to study a couple of analog filters. I've created a sine signal from the Wavegen tool, and am probing the output on both the Oscilloscope channels. From ...
eccentricOrange's user avatar
0 votes
1 answer
98 views

How can I measure a 100 MHz signal with unknown source impedance with an oscilloscope?

As a part of a device I designed, I have to measure multiple higher frequency square wave (and sinusodial) signals with unkown source impedance. The intended signal path is shown in the picture: My ...
Robert's user avatar
  • 49
0 votes
5 answers
137 views

Oscilloscope is acting really weird [closed]

While not connected to a probe it acts fine but as soon as I connect a probe to it it acts up and gives me a weird signal that increases and decreases as my hand gets closer and farther from the probe....
Dušan Novković's user avatar
0 votes
2 answers
56 views

Oscilloscope or Logic Analyzer for Studying Serial Communication? [closed]

I have been programming microcontrollers with serial interfaces (the usual: I2C, SPI and UART) mostly for learning purposes and would like to see the signals, if they conform to the timing diagrams in ...
First User's user avatar
0 votes
1 answer
46 views

Wiring non-inverting opamp

I have an Texas Instrumentes OP07 and am trying to wire it as non-inverting amplifier. I have made some photos. On the "near" photo you can barely see the "orientation circle": I ...
Hansebenger's user avatar
0 votes
0 answers
14 views

Pulse width modulation using ML4800CP

I am working on a SMPS (450 V output). It use an ML4800CP IC to control and manage 450 V DC. How can I measure the PWM signal using an oscilloscope? I attached it, and it worked well for the PFC ...
Muhammad Hafeez Rehman's user avatar
1 vote
3 answers
120 views

Unexpected Overshoot with Switch Bounce

I am measuring switch bounce on a breadboard with a simple push button switch in series with a 100K resistor. Circuit power is s 3 channel Siglent SPD 3303C. Measurements completed with a Rigol ...
luther_stanton's user avatar
0 votes
0 answers
36 views

How to estimate the required scope BW given rise/fall times?

To be able to capture voltage pulse shapes as short as 0.5ns and with rise and fall times down to 100ps, is there a basic way to roughly estimate the minimum required analog BW and sample rate ect of ...
ty_1917's user avatar
  • 1,016
0 votes
1 answer
46 views

Coax cables, impedance matching and BNC extensions

I'm trying to understand how to do proper measurements with a Voltage Differential Probe ( TT-SI 9010. This probe has an output impedance of 50ohm and has a BNC (It doesn't specify it in the data ...
Santi Ospina's user avatar
1 vote
1 answer
51 views

Coax cables and input impedances

I'm doing a voltage measurement with the help of an Active Differential Probe (TESTEC TT-SI 9010) with an output voltage of +-7V. This voltages have rise times of the order 500ns. The set up looks ...
Santi Ospina's user avatar
10 votes
2 answers
1k views

Trying to get the full potential of my 100 MHz oscilloscope

I posted a question yesterday in which I realized a 100 MHz oscilloscope with 100 MHz x10 probe will have hard time capturing high frequency signals such as the ringing on rising/falling edge, and ...
Jimmy.D's user avatar
  • 569
22 votes
2 answers
5k views

100 MHz probe and 200 MHz probe show very different waveform on 1 MHz signal

Recently I purchased my very first scope and noticed something I'm really curious about its cause. It's a 100 MHz scope, when I was testing to see the ringing of a 1 MHz clock signal with different ...
Jimmy.D's user avatar
  • 569
0 votes
1 answer
98 views

Measuring if a capacitor on mains is turned on by measuring radiated electrical fields far away

There is a house connected to German mains with hot, neutral and ground. Some distance away in the village there is a PWM source (most propably a solar inverter) which shows as 17kHz on the mains ...
Hansebenger's user avatar
5 votes
3 answers
913 views

Just inherited a digital phosphor oscilloscope and trying to figure out why the sine wave is doubled

I was just given a Tektronix TDS 3014B and I wanted to learn how to use it. I setup a simple sine wave generator and I'm working through all the menus. When I start the sine wave, everything looks ...
joe_coolish's user avatar
0 votes
0 answers
39 views

PWM signal for DC motor vs voicecoil

I'm working on a project where I want to design my own current driver to drive different kind of loads. A friend of mine lent me a motor, an Arduino UNO to generate the PWM and half-bridge IC (L293D) ...
Kike Rueda's user avatar
1 vote
0 answers
287 views

Is a 100MHz oscilloscope good enough for SPI, UART, I2C and CAN?

I am having trouble with microcontrollers (STM32s mainly) on custom PCBs. I want to get an oscilloscope to help me solve these issues. Naturally budget is small so I want to know is if a 100 MHz ...
Calvin Alberts's user avatar
4 votes
3 answers
394 views

Expanding oscilloscope bandwidth by amplifying higher frequencies

Is it possible to increase the oscilloscope bandwidth by: Adding an amplifier circuit to the oscilloscope input. This circuit would have a frequency-dependent gain selected in such a way as to ...
piotr's user avatar
  • 292
2 votes
1 answer
79 views

“Old school” Virtual Oscilloscope SWF [closed]

There used to be a seriously good virtual oscilloscope that I used in my classroom which happened to utilize shockwave flash, but is now no longer accessible due to flash no longer being supported. ...
Brandon Fleming's user avatar
0 votes
1 answer
80 views

Signal gets amplified in oscilloscope

I am fresher and doing a semi-conductor experiment at my university. I have some problems with my oscilloscope. Signal from my university's oscilloscope: My input signal is 2V peak to peak, with the ...
CÔNG NGUYỄN DUY's user avatar
1 vote
2 answers
165 views

Emitter circuit on a breadboard

I am working on an emitter circuit that has a 2N3904 NPN transistor. I have simulated the circuit before and got the results. I am trying to build it in the lab so I can compare the results to my ...
Ben Müller's user avatar
0 votes
2 answers
116 views

Is this modified or pure sine wave...or something else?

I have a 12 volt dc to 120 volt ac inverter built into my custom van. I've been curious if it produces a modified or pure sine wave because I have a need to occasionally plug a ebike battery charger ...
HLM's user avatar
  • 1
0 votes
0 answers
10 views

AD2 waveforms oscilloscope data logging question

Does anyone know a good way to log oscilloscope data for a specified time duration using Waveforms software and an AD2? I am trying to read a raw signal with the oscilloscope function in Waveforms ...
rtx_q505's user avatar
4 votes
1 answer
84 views

Unknown signal source

Using my oscilloscope near my TV(a Panasonic TH-L42U20A) seems to introduce an unidentifiable source of noise. The scope probe is floating, neither probe or ground clip is connected to anything, ...
lemon's user avatar
  • 590
0 votes
2 answers
211 views

Issue with LED and capacitor circuit

I have recently downloaded and am familiarising myself with LTspice, and to do so I started with a basic circuit. I had never used a scope prior to this and thought a capacitor discharging to an LED ...
Smi Jay's user avatar

1
2 3 4 5
29