Oscilloscope Pc Based
Violette Ransone
Ultra-compact range of 8-bit oscilloscopes and mixed-signal oscilloscopes (MSO). 2000B models offer more memory and bandwidth. All models are USB-powered and have a built-in function generator and AWG.
General-purpose 8-bit oscilloscopes and mixed-signal oscilloscopes (MSO) that combine fast sampling rates with class-leading deep buffer memories. All models have a built-in function generator and AWG.
High-resolution oscilloscopes with 12 to 16-bit resolution. Low noise and distortion provide unmatched signal fidelity. All are USB-powered and most include an AWG. Series includes differential-input models.
Flexible Resolution Oscilloscopes. Breakthrough ADC technology allows a range of hardware resolutions from 8 to 16 bits. Combines the high sampling rate of the PicoScope 3000 Series with the high resolution of the PicoScope 4000 Series.
High-performance oscilloscopes with up to 3 GHz bandwidth, 8 or 8-12 bit flexible resolution and ultra-deep capture memory that delivers 200 ms capture duration at maximum sample rate of 10 GS/s. Optional MSO pods add up to 16 digital channels.
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I'm building a hobby oscilloscope on an ATmega16 microcontroller. The main problem is that I receive a large amount of noise while measuring the signal. I used LF353 amplifiers to shift voltage and I suspect that they might be causing the noise.
Any voltage rail that you apply directly to the analog signal path through resistances such as your R6 will have to be dead quiet to prevent noise problems. It also is obvious that using the 5V supply to bias the signal path the way that you are will result in the signal input to the A/D having a dependency on the absolute value of this supply voltage.
I would think that you will want to rethink your design some so that the only thing directly biasing the signal path is the input voltage and the op-amp outputs. This way you remove the effect of variations of the supply voltage by a factor of the PSSR (power supply rejection ratio) of the op-amps used.
Finally I think for best bandwidth support, as you refine your technique, you will want to drive your A/D input from as low of impedance source as possible. Your current source impedance is approximately 33K 82K. This seems rather high and may need to be significantly lower if you plan to ever be trying to multiplex several channels in sequence.
The last comment I'll make is that you should try to leverage separate AVCC and AGND pins on the MCU such that you use a separate filtered 5V and GND for the analog circuitry and connect them to the MCU GND right at the MCU.
The difference between PC-based USB oscilloscopes (referred to as a USB oscilloscope) and stand-alone oscilloscopes is that a USB oscilloscope does not have buttons or a screen and is connected to a computer through a USB. The device is then controlled by the computer, and results are displayed on the computer screen. The following picture is an illustration of a USB oscilloscope in use:
Compared with stand-alone oscilloscope, PC-Based USB Oscilloscopes have the following advantages:
1. Small size, easy to carry.
2. PC screen is larger so the waveforms can be seen more clearly.
3. No screen component so the price is lower.
4. PC interface makes it easy to process and edit files.
5. Users can design their own programs to control the oscilloscope.
Many USB oscilloscope software use a conventional window design because it is the easiest to design. However, such a design does not comply with the actual use of oscilloscopes and causes difficulties and inconvenience for users.
In the overview function, the top of the screen shows the entire waveform and the magnified portion of the waveform is shown below that. The grey area can be dragged at the top or the scroll bar at the bottom can be used to change the section displayed.
The equivalent sampling function: for periodic signals, this function analyzes signals and graphs them at a sample rate of 4 GS/s. It increases the sampling resolution and provides the user with more details.
The logic analyzer mode can decode bus data and save development time. This Mode can decode common protocol such as: I2C, UART, I2S, PS2, CAN Bus, 1-Wire, S/PDIF, Lin Bus, Microwire, Miller, Manchester, SM Bus, and Modbus. Will continue to be added and free update.
Perytech USB Oscilloscope comprises a black aluminum alloy case with an excellent texture. The alloy case receives hair-line surface treatment to ensure the exterior is very trendy. The exterior is very trendy, with great texture. The device is small, light, and convenient to carry.
*The hardware trigger is an important part of an oscilloscope. Some low-priced oscilloscopes do not include this feature because it increases the cost, however, absence of this feature leads to numerous problems. Please view the following video to understand the importance of hardware triggers:
Hi all,
New to Ardunio - been using LV for a while. My boss seems to think that there is a way to use an Arduino Uno land its on-board DAC ike an oscilloscope to read voltage vs. time and plot the waveform in a VI. Struggling to wrap my head around it. I can plot a sine and a square wave with the Analog Read within LINX, but it simply runs as # of samples on the x-axis and I can't control it with time (or slow down the # of ssmples collected). Has anyone ever written (or tried to write) an o-scope code for an Arduino in LabView? Any logic suggestions, a screenshot or example code (for LV 14 and down) would be useful. Thanks in advance!
Thanks for the tips. 10 KHz is a bit slow, but as a proof of concept, it'll work for this purpose. The signal never excdeeds 4V (it can't due to an inline pre-amp installed before the scope) and is properly terminated/grounded so I am not worried about spikes.
You are correct - the LINX toolkit is all on-demand, so I will likely have to wire this the old-fashioned way through the VISA protocols. If you have any other suggestions or examples you can point me to, please share. Thanks!
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This work was supported by DARPA through the optical arbitrary waveform generation programme and by the Center for Nanoscale Systems, supported by the NSF and the New York State Office of Science, Technology and Academic Research.
The latest state-of-the-art oscilloscopes can achieve single-shot waveform measurements with a resolution of about 30 picoseconds. But ever greater telecommunication data rates and an expanding interest in ultrafast chemical and physical phenomena mean that there is now a demand for devices that measure optical waveforms with subpicosecond resolution. The sensitivity of conventional oscilloscopes is limited by the electronic bandwidth of photodetectors and circuits. Now Foster et al. demonstrate an all-optical method for real-time measurement of temporal optical waveforms with a resolution a hundredfold higher than electronic techniques. The heart of the device is a silicon photonic chip made with the same materials and techniques as standard microprocessors but which manipulates photons instead of electrons. The potential integration of this device in microelectronics could produce an instrument that could be used in many branches of science where simple measurements of optical waveforms are required.
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