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

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100 views

What should I expect the output of my line scanner to look like on an oscilloscope?

I'm trying to test my TSL1401R-LF line scan camera module by checking the reading on an oscilloscope. I've confirmed that my SI and CLK signal are running normally but the output looks very strange to ...
1
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1answer
122 views

Why does the Oscilloscope show a longer period of time than my code sets?

So I'm programming a TSL1401R-LF line scan camera module that reads in a a 1 X 128 array of pixels. I've run into a problem with the accuracy of the output. Basically the camera becomes less accurate ...
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0answers
62 views

Current flowing without return path through USB

Using a 'soundcard oscilloscope' I measured square wave output of an arduino , to my amazement I found out that I get the exact same output on my oscope software even with the ground cable of the ...
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0answers
54 views

Finding UART pins on a PCB header

I have a PCB with some headers exposed. I know for certain that some of those pins are UART connections (RX,TX, Ground). I'm hoping to find RS232 with TTL voltage levels but this is just an assumption....
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0answers
42 views

Measure 3-phase Power with Lecroy Waverunner

Please note that experience with a Lecroy Waverunner Oscilliscope is most likely required to answer this question. I'm attempting to measure the power draw of a brushless 3-phase motor with a Lecroy ...
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1answer
102 views

Oscilloscope probes, measurement

I'm new to electronics and have a question about oscilloscopes, if I understand this correct when attaching probes, one of the leads of the probe needs to be grounded, my question is why? Can't I use ...
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1answer
82 views

How to capture USB data on the oscilloscope?

Using 2 channel oscilloscope (BK precision 2542B), channel 1 trigger on the triggered signal, channel 2 is on the Data+ of the USB port. After sending the triggered signal to the bar code scanner, I ...
5
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1answer
148 views

calculate FFT based on an oscillogram

Hi, I'd like to understand the context in between an oscillogramm and the resulting FFT. My example is a full-wave rectifier and I am try to calculate some harmonics. Because the function is ...
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0answers
41 views

adapter to use a soundcard oscilloscope

I would like to use my soundcard as osciloscope to measure low voltage analog signal (between 0 and 5v). I would like to insert a circuit between the sound card input and what is measured The goal ...
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2answers
102 views

How does external trigger work in an oscilloscope?

I'm having hard time to find any easy explanation to understand how triggering and especially external triggering works. And it is even more confusing when a function generator's SYNC/TTL output is ...
6
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4answers
737 views

What is VAR knob used for and why should it be usually in CAL position in analog scopes?

I'm trying to understand the VAR CAL uses in analog scopes. Almost all the texts I read mention briefly about these and do not explain well. Here are some examples: CAUTION! There is usually a ...
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2answers
112 views

How to obtain the widest pulse on an oscilloscope?

I need to get the widest pulse from a train of pulses. In some tester you have the option to show only the highest measure, There's a way to do that with the pulse measure in a DSO? The DSO is an ...
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1answer
33 views

Measuring RF voltage transformed by a toroid

This evening I attempted to measure the voltage off of a transformer used for detecting RF currents. This transformer was implemented as a single turn of conductor, through the center of a toroid ...
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0answers
35 views

How to trigger a sampling oscilloscope on a PAM-5 signal

I am trying to acquire an eye diagram on a Gigabit Ethernet (PAM-5) signal, measuring differentially over pair 1. I am using a Tektronix DSA 71254c. I have not been able to successfully configure the ...
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1answer
61 views

Average of AC signal measured with oscilloscope

I'm wondering why the oscilloscope displays that average rectifier ripple voltage value measured in AC mode is higher than zero. Moreover, the minimum value happens also to be higher than zero. ...
3
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2answers
909 views

I released the smoke from oscillosope probes, how to repair?

I discovered that while my Siglent SDS1052DL oscilloscope has about a megohm of input impedance, the ground of each channel is actually common. I accidentally connected a 12 volt, 25 amp power supply ...
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0answers
41 views

Oscilloscope builds charge on ground even when it is connected to mains ground

I have a following situation - my scope (UT4102C if that matters) builds some charge (quite painful to touch) on its ground (BNC connectors outer hull) even when it is connected via proper IEC cable ...
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0answers
24 views

GeneratorScope 2 trace rotation?

I have a open uni generator scope ii Don't know how to adjust the trace rotation as it is not level I've already tried looking for the adjustment pot on the outside but can't find it
2
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1answer
146 views

Pulling the circuit's voltage to the ground with grounded probe

When measuring a point on an isolated circuit board with my grounded oscilloscope, I fear my oscilloscope ground will pull the measured point to ground level but this has never happened, I am always ...
3
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1answer
49 views

Should I connect ground for differential measurement with oscilliscope?

Suppose I need to view voltage between two arbitrary points of a circuit with an oscilloscope. For that I can use two probes and A-B math, but should I connect the ground lead to the circuit? How to ...
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2answers
39 views

Input impedance of oscilloscope and BNC terminator

Assuming an oscilloscope has the input impedance of 1MΩ, you could adjust it to 50Ω by using 50Ω BNC terminator. And I think you could do the same thing by just changing input impedance option in the ...
0
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2answers
145 views

Power cord without ground cable

Ground cable was ripped from the power cord of most expensive oscilloscope in the lab . Neutral and line cables are stil there . Do you think this is done on purpose ? if so , why ?
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1answer
34 views

Oscilloscope training resources

I would like to learn to use an oscilloscope properly. I used them a few times at school, but that was a long time ago and I've forgotten most of what I learned about their use. I'm now working with ...
9
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1answer
1k views

Capacitor discharging theory vs experiment doesnt match

I am trying to discharge my 1F capacitor over a 47 ohm resistance which i connected in parallel with the capacitor . İ have calculated the time it would take to discharge from 5V to 4V as 10.55 ...
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1answer
98 views

will there be any difference between the output of a 555 oneshot and one made with a 74123?

I think there won't be any difference because the professor wants us to build both with 10 us pulse and with a duty cycle of 25%. I didn't have enough time to build both MMV, so that's why I am ...
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2answers
83 views

Oscilloscope probe measure squarewave

As I was trying to validate our pcb design, I measured the impedance matching on the digital transmission lines, and got stuck with the oscilloscope not showing what I expected. We are using the ...
0
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1answer
52 views

Duty cycle and electronic circuits

A function generator with an internal resistance of $$50\Omega$$ is set to produce a 1kHz square wave with $$20v_{p-p}$$ The duty cycle is 80%. The signal is run through a $$50\Omega$$ resistor. I ...
3
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1answer
83 views

What frequency should an oscilloscope be rated at to measure USB signals

I'm trying to understand how I can figure out the minimum requirements of an oscilloscope in order to measure for example USB 2 full speed signals at 12mbps. I know it's not safe or correct to say ...
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4answers
140 views

reverse engineering a serial protocol with a scope

In lieu of a serial capture device are we able to look at the output of an rs-232 feed and correlate what we see on the scope with ASCII/hex representations (do certain voltages tend to correspond ...
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4answers
119 views

Are there any alternatives for a cathode ray oscilloscope

I am conducting a few basic electronic experiments at my home. To measure the variables of these experiments, I need to analyze their input and output wave forms. This would require a cathode ray ...
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1answer
91 views

Oscilloscope ground oscillating [closed]

I turn on the oscilloscope, work a little, then I remove the cables and after a while when I want to use it again, I notice the ground has moved 0.4 or 0.6 V upper or lower than it was half an hour ...
0
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1answer
55 views

Power at the differential output

I was measuring the voltage at the intermediate frequency output of this tuner http://superkuh.com/gnuradio/R820T_datasheet-Non_R-20111130_unlocked.pdf using the oscilloscope. The tuner has a ...
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votes
4answers
153 views

What analog circuit i should use to shifting a signal from -5..5v into 0..10v? [duplicate]

I want to output my circuit from -5..5v into 0..10v. My circuit generate -5..5v. What should i do to generate that signal? what analog circuit i should use? thanks
0
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1answer
42 views

Find the inductance using function generator, oscilloscope, capacitors, resistors, multimeter, voltage generator

I am trying to find the inductance of a inductor. I have tried many different methods such as putting the inductor in parallel with a capacitor to form a tank circuit and in series with a resistor ...
1
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2answers
69 views

Which oscilloscopes can reliably measure losses in an inverter for an AC motor?

For my next project at my workplace I am looking for an oscilloscope which gives me good support in measuring the losses in one of the half-bridge switches over one commutation period. The last time I ...
1
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1answer
76 views

How can I calibrate my sound card based oscilloscope?

I'm using Soundcard Oscilloscope software that presents as below You'll notice that the display has a grid, and in the example is set for 100mV/div. Since it's using the sound card integral to my ...
10
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4answers
613 views

Why did my oscilloscope hookup trip my RCD?

I was attempting to investigate an SPI interface on a power line meter (typical model that measures Voltage, Frequency, Amps, Watts). I opened the module and found the SPI pins broken out. So I ...
3
votes
2answers
64 views

Is the measurement accuracy of a test instrument consistently the same?

Let's say, for example, an oscilloscope (could be a multimeter, power supply, or other type of equipment) has a voltage tolerance of +/- 3%. I input a signal with a known voltage and determine this ...
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1answer
101 views

Oscilloscope malfunction: Can someone help with a diagnosis?

This is the screen on my Tektronix 2465 oscilloscope when I power it up. It used to have the lines going all the way across and and when I would connect the probe to the stereo output (as a ...
0
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1answer
40 views

How to evaluate equivalent 'samples per second' from Time base value?

The following is from Tek DSO manual about the Time base and sample rates. When i turn the knob further, i am able to read values like M 100ms or M 250ms. What woud these evaluate to in terms of '...
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0answers
49 views

Inverting op amp gain using high value resistors and using oscilloscope measuremnts

I built an inverting op amp circuit as shown in above figure using varying values for Rf and Rin. When I used Rf=10kohm and Rin=100ohm, my measured gain (using national instrument's virtual ...
2
votes
1answer
45 views

Ungenerated Voltage across the DMM and random spikes across the Oscilloscope

I am working with piezoelectric material known as PZT-P-43 MY PZT datasheet (please look at the red outlined). So far I have been trying to find the Energy that is being delivered to my 100uF ...
1
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0answers
51 views

Frequency of Natural Resonance with Parasitic Component due to Oscilloscope

So, I've just performed a lab on measuring the resonance of an LCR circuit. I rearranged the circuit so each time the component in question had one lead on the ground plane, and then measured it's ...
0
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1answer
36 views

Changing the data logging rate on a Tektronix DSO

Currently, for a continuous waveform, i am able to log data from the Tektronix TBA 1064 DSO as .csv files. The time interval between two samples currently is around 4 * E-08 (by default). My ...
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1answer
67 views

Non-rectified Voltage output across the capacitor

So I am testing my PZT Piezoelectric material's Voltage output across a Capacitor of 1000uF after converting AC to DC using an Oscilloscope. Oscilloscope model: Gwinstek GDS-2102. The diagram is my ...
6
votes
2answers
165 views

How is a 50Ω “back-termination” accomplished on a scope probe line?

I've just been watching Jim Williams' very excellent video on Measuring Switching Regulator Noise. At 1:58 Jim mentions a "50Ω back termination" in the probe setup that looks something like this (but ...
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2answers
95 views

TIP-Barrel test of oscilloscope

I am trying to measure the noise at the output of my buck regulator. I am getting some ripples. I feel that the ground loop caused by my oscilloscope GND ref might have a small impact here. I was ...
0
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1answer
93 views

Pic18f4550 oscilloscope

I've built a simple pc oscilloscope using pic18f4550 and a 20 MHz crystal. I've made a simple application using vb2010 which is able to show the frequency oscillation on pc. The problem that I have ...
2
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1answer
133 views

How to measure supply currents ranging from 1μA to 10mA?

I’m building a battery powered data logger with a microcontroller and several sensors. I’d like to measure the supply current of individual parts with idle currents in the μA range and peak currents ...
1
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3answers
331 views

calculating the average power using the oscilloscope

I am trying to measure the real power of an inductor, and in the manual it is said that I have to connect a resistor with low resistance to the inductor and then see the voltage difference between the ...