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Subscribe print edition Click Here. Our Prestigious Advertisers.In may instances a computer will be available in an environment where electronic equipment is to be tested, and therefore using the processing power, screen and power supply of the PC or other computer makes sense, saving on cost and space. In view of the demand for USB oscilloscopes, a large variety is available, offering the full range of capabilities from entry level USB scopes right up to sampling oscilloscopes with bandwidths extending into the GHz region.
These test instruments enable considerable cost savings to be made without compromising on performance dependent upon the USB scope selected. It is possible for scopes using personal computers, PCs, to use a variety of methods to link to PCs. However in recent years USB has become standard on virtually all computers and as a result it does not require the use of an additional card like a Firewire card, etc to use one of these test instruments. The other advantage is that having a digital USB scope design enables the advantages and cost savings of quantity can be made.
Fewer variants are required for different interfaces, and therefore it is possible to focus on optimising the test instrument design for USB. It is also interesting to note that many boxed digital oscilloscopes adopt exactly the same approach and have the same basic circuit blocks, the only real difference is that the USB scope uses an external PC or other computer for the control and display.
This provides a convenient and sufficiently high speed data link by which the USB scope and computer can communicate. Although the test equipment from different manufacturers and those at different positions within the ranges from manufacturers will differ, there are some common aspects of these scopes that can be outlined. There are two main approaches that are used for USB oscilloscopes, one providing much cheaper, but lower performance scopes, and the other providing a much more satisfactory solution.
This form of USB oscilloscope uses an on-board microprocessor to control and undertake the measurements, but in this simple format there are some severe limitations. In terms of its operation, the incoming waveform enters the scope and undergoes analogue conditioning: attenuation; amplification; impedance matching, as required. It is then passed into an analogue to digital converter, ADC and the data is presented to a microprocessor.
In view of the architecture of the processor, typically the processor organises the data so that it can be sent to the computer for most of the processing. This means that a lot of data needs to be passed to the computer over the USB link and this can prove to be a bottleneck.
One of the main issues is that it is not possible to guarantee the start of the trigger, so it is possible to miss an important event on the signal. This could result in a lot of time being spent tracking an issue onto e signal because it cannot be seen by the scope.
These enable much more processing to be achieved within the USB scope itself and also in a much shorter time. These devices can be configured to perform the exact tasks required and therefore they can process the data much faster and they can handle much more data to ensure the best displays of the waveforms are obtained.
One important area where this can be experienced is for the triggering, where the much faster operation means that the scope is able to trigger properly, even at the full scope rate. The USB scope processes the data that is captured and then passes the waveform to be displayed to the PC or other computer using a lossless format over the USB link.United States. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for. Search instead for. Did you mean:. I am trying to write a VI that will control an oscilloscope through the Ethernet interface. I am having some trouble. Message 1 of 5. Re: ethernet programming. I am assuming that you osciloscope has an ethernet interface, and if that interface is enabled for ethernet communication with a PC there should normally be a.
If they do not support the scope with a nice and easy. Building a GUI that looks like the scope is easy after that. You could Use an image and overlay the controls and graph over the image and that gives it a really close look and feel to the scope. Message 2 of 5. NI Employee. If you cannot find one there, I would then ask the manufacturer for any drivers they may have.
These would be the recommended ways to communicate with your scope, since the interface would be already defined for you. There are some good links to our knowledgebase and some other forum posts about this. Jeremy L. National Instruments Jeremy L. National Instruments. Message 3 of 5.The Arduino can reliably gather voltage readings at a frequency of between and KiloHertz.
Transfered to a PC, these points can be accurately plotted against time. This Instructable will show you how the analogue input can be repeatedly added to a byte buffer and then transferred to a serial monitor.
The data is collected using a high frequency interrupt, whose period can be accurately determined. The frequency can be altered to produce a range of possible periods. I have written a PC interface to display the data and control the arduino. My PC program is presented as is - it would take a very long instructable to explain it! The data output from the Arduino is not complex. I am sure others will write interfaces for the operating system of their choosing I have written two slightly different versions for the Arduino data capture.
One utilizes software triggering for when an accurate change in voltage is required, before the oscilloscope triggers. The second, uses hardware edge triggering based on an interrupt on Arduino pin 2. The hardware version runs a little faster at the highest frequency.
The PC interface now includes the option to set the voltage reference to accurately reflect the real value of the Arduino "5V" line. There are also small adjustments to the Arduino software. If there is interest, let me know.
Did you use this instructable in your classroom? Add a Teacher Note to share how you incorporated it into your lesson. The following component works- alternatives may be viable with program tweaking- I leave that to you!
Simple Buffer box to accept analogue voltages: Only required if you don't already have voltage buffers. The trigger level can be specified in mV.It was designed to be a project that can be constructed by any electronics hobbyist, without too much of effort. That is why this scope is aimed at those engineers who find full-fledged oscilloscopes too expensive for their liking but at the same time require an oscilloscope to debug their designs or test signals.
Since this is an inexpensive design of an oscilloscope, there are certain limitations to what the oscilloscope can do. For instance, the bandwidth is lower than of a commercial scope, so its use is limited to kHz and below signals. Its sample buffer is also smaller than of a commercial scope but is good enough to handle most oscilloscope functions. The maximum sampling rate is 1 MHz, with a sampling mode of 5 MHz equivalent.
It supports USB, serial and parallel ports. Jonathan Weaver, who created this tool for general use at his home, made the tool available for anyone who would benefit from his software and schematics. Working The scope connects with your Windows computer and communicates with the OS to display the captured waveform in both time and frequency domains.
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Get help. Create an account. Electronics For You. Home Buyers' Guides Software Reviews. Please enter your comment! Please enter your name here. You have entered an incorrect email address! Follow our Social Channels. IOT Zone. Intern Technical-Engineering 15 April Frontend Developer — Intern 14 April Angular Developer 13 April Popular Articles. Door-Ajar Alert with Countdown Timer. Smart Lighting with LiFi. Professional Electronics Design.Oscilloscopes are an essential tool for electronics hobbyists and professionals to verify that their designs would work as expected.
PC based Oscilloscope score over standalone oscilloscopes due to their compact size, low cost and ability to do offline analysis. Here we describe how you can make your own oscilloscope at a very low cost using your PC and an Arduino board as the hardware for signal acquisition. You can use this oscilloscope to capture frequency signals up to 5kHz. We have provided here an Arduino sketch, which you can compile and load directly to the Arduino. You also need to install an executable file or application in your Windows PC.
This application works as the front-end to plot input signals as waveforms on your computer screen. For this project, you can use any variant of the Arduino as hardware.
In the project, we use pin A0 to capture the input signal. The sampling speed of the oscilloscope is limited by the baud rate of the UART. The PC scope set-up is quite simple and straightforward as shown in Fig.
Any external power supply for the board is not required as the board is powered by the USB only.
You need Arduino sketch pcscope. Install PCScope. Connect the Arduino board to the PC and flash the sketch into the microcontroller on the Arduino board. So it is advisable to add a small protection circuit to limit the input voltage to 5V and clamp the negative voltage.
A low-power, fast-switching diode like 1N can be used to protect the input pin. Connect a kilo-ohm resistor in series with the input. It will work as a current limiter in case the input goes beyond 5V. Additional voltage dividers can be used in case you need to measure voltages higher than 5V. Arduino sketch. The sampling rate of this PC scope application is limited by the rate at which the data is sent to the PC.
It is important to get the ADC signals much before this time to get reliable data plotting. PC software. The serial port data is captured through Arduino at regular time intervals and plotted as a graph on the screen using the Plot function library.
The display points along X-axis are calculated based on the user-defined time scale. The Y-axis range is set using the voltage selection control. When the board gets connected to your PC, you will get a confirmation message for three seconds as shown in Fig. Feed any squarewave input of up to 5kHz at CON1. The software must plot its output waveform on your PC. Square and triangular output waveforms of Hz and Hz captured on the screen during testing are shown in Figs 4 and 5, respectively.
Similarly, you can feed rectangular or pulse inputs but not sine waves to get output waveforms. Feel interested? Check out more electronics projects.Why not get more profit from your Amazon Sponsored Product Ads with less work?
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USB Oscilloscope: PC based scope
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