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Found 114 results

  1. Analog Discovery: Measuring Transients The following question was posted on our Analog Discovery Quickstart Video: "How do you measure the transient in a circuit breaker using the Analog Discovery?" Thank you for your help, Studio Manager
  2. I lost the USB cable that came with my Analog Discovery. Can I use any standard USB A to micro B cable ? If so, what cable length is recommended ?Thank You
  3. I am a teacher new to Analog Discovery. I am attempting to use the Analog Discovery Module with Waveforms software to demonstrate the electrical behavior of typical logic gates (NAND, NOR, XOR, AND, etc.) to a section of high school seniors. The IC chips that I am using have been tested with LEDs and push buttons and display the intended outcomes. However, when I attempt to run logical patterns through the chips using ADM, logical lows on the output just appear to bounce around. I am attaching files showing Logic, Pattern and Supplies screens. Output is being measured by DIO2. I have also tested the same connections by slowing down to 1Hz and .5Hz with the Static IO screen and the light (for NAND, for example) goes {on, on, on, flickers}, giving an equivalent output to that seen on the Logic screen. The output from the NAND gate shown, below, uses an M74HC00 that works satisfactorily when LEDs and physical switches are used to control input signals. Thoughts, ideas or suggestions? M74HC00B1_quad_2input_NAND.pdf
  4. Hi! In Waveforms 3, one can choose Clock as the output type in Digital Pattern Generator. However, Waveforms SDK offers only 3 choices i.e. Pulse, Custom and Random. Is there any way to directly set the clock or one is is required to customize the Pulse or Random to behave as a clock?
  5. A customer asked, Can I use the Analog Discovery with National Instruments Software Ex. LabView Or LabWindows CVI? Thank You,
  6. Hi, Does the Analog Discovery - Logic Analyzer support probing of logic lines upto 0-5V? Or does it only work upto 3.3V? Thanks!
  7. Hi, I run analog discovery Analog In Trigger input code. I want to save the every acquisitions in file but in this code the while loop is not break or ends. can anyone help me in breaking/ending this while loop. loop is: for iTrigger in range(1,101): #begin acquisition dwf.FDwfAnalogInConfigure(hdwf, c_bool(False), c_bool(True)) x = "i" while True: dwf.FDwfAnalogInStatus(hdwf, c_bool(1), byref(sts)) print " i am here!!%s", i i = i+1 if sts.value == DwfStateDone.value : break time.sleep(0.001) dwf.FDwfAnalogInStatusData(hdwf, 0, rgdSamples, 8192) dc = sum(rgdSamples)/len(rgdSamples) print "Acquisition #"+str(iTrigger)+" average: "+str(dc)+"V" any guideline or suggestion? or verified answer
  8. Hi, I am trying to analyze a weak photoplethysmography signal using the oscilloscope feature of Analog Discovery. I am seeing an additional shadow plot in the background of the actual signal. I am curious what does the background plot indicate? I didn't find any information regarding this in your manuals. Please see the attached figure. Thanks, Raj
  9. The Analog Discovery SDK has a number of functions for sampling and reporting "noise." I cannot tell from the documentation what the noise refers to. It appears that the length of the noise data is 1/16th the length of the analog sample data. Is it simply a way of doing min/max samplings on the regular analog data? Is there a discussion of these functions somewhere? I'd be most grateful for any further information on this topic.
  10. I'm using the python version of the Analog Discovery SDK to directly access the device. When I interrogate the device for its analog input ranges, it tells me that it has two: 5.0 and 50.0 volts. If I run the Waveform software I see many more possibilities, many decades of 1-2-5 steps. A 14 bit adc with an input range of 5V has a step of about 300 uV. From this I infer that the extra resolution Waveform provides is not simply a matter of zooming in on the 5V range. Does anyone know what's going on?
  11. Juergen Sauermann published a classic oscilloscope like application for Linux, based on Qt and WaveForms SDK. This project can be found on the following location:
  12. I have been trying to find the vertical and horizontal accuracy specs of the Analog Discovery's scope in Digilent's documentation but with no success. Any suggestions where I might find this or has anyone done a measurement comparison?
  13. I have an external event that operates at a frequency of 10-20 kHz that can be accessed through a TTL signal. This TTL signal has negative peaks that last about 2 us which could potentially be used as trigger events. I also have a custom waveform that I'd can load into the waveforms software via the custom tab and what I'd like to do is use the external TTL signals as a mechanism to march through each row of the custom waveform. When the number of external clock pulses exceeds the custom waveform length I'd like the row to simply reset (e.g. modulo operator). Now to top it off I'd like this whole process to be triggered by yet a second master pulse that starts the whole crazy sequence. Is this doable? If so might someone point me to the appropriate Waveforms SDK functions? Better yet, if some python pseudo code could be produced and you visit Pullman I will buy beers. The problem I have now with simply setting the frequency and using a master signal trigger is that there is some jitter that creates a scenario where the custom waveform "marches" out of sync with the master pulse. Cheers, Brian
  14. I used an analog discovery a lot for a class last year, but just pulled it out for the first time in a while. I used the +5VDC supply to power a MCU project but kept getting current overdraw warnings after a few minutes. With all instruments closed and the analog discovery's pin header completely disconnected, the device is still drawing ~425 mA, which seems a bit high. Is it normal for the AD to have only ~75 mA of headroom for the voltage supply tool? I remember it being able to handle much more in the past.
  15. Hi! First of all I would like to say great thanks for the Real Analog class. Great lecturer and material! It seems to me that I found an minor error in course material of chapter 3. On page 19, example 3.3, the first equation written for supernode A misses the current, flowing through R1 resistance (Va+2*Vx-Vb)/R1 Best regards, Andy.
  16. Hello Probably i want order a Analog Discovery. Before that i have some requirements/questions about the possibilities of the equipment/ software. 1) Can i record my Inputs/ Outputs related/synced to each other? This for later calculations in GNU Octave… (fs_max = 200 kHz) 2) Is it possible to record inputs and outputs based on a trigger in one of the recorded signals. Let say i record 2 inputs and the trigger is one of the inputs?. Is this trigger adjustable? So that in a noisy environment the trigger not start. 3) I Work mostly with OSX or Ubuntu and I don't have experience with programming outside GNU Octave/ Matlab. What are the possibilities of WaveForm SDK and GUI? Is that something what is easy to learn are there some tutorials or other stuff? 4) Is it posible to work with (long) delays? sends signal on OUT1 and about 1 sec later i get a (complex and longer) response on IN1 how to deal with this. including recording of question 1 Thanks Jan-Bert
  17. Hi, I am running Waveforms 3 beta on my macbook and i have encounterd a problem. When trying to capture and voltage impulse from my accelerometer the Scope never reacts to it. I have set Mode to normal, with condition: rising and level:0.2V And it never captures anything. I have checked the single acq. with the waveform generator, and when using that as an input it works flawless. What could be my error here?
  18. I'm trying to use the Analog Discovery logic analyzer with an Intel Edison. The Edison has 1.8V I/O. This does not reliably trigger the LVCMOS33 inputs on the FPGA inside the Analog Discovery. I think it might be possible to reconfigure the FPGA as LVCMOS18 input with a software option and the appropriate FPGA configuration. So I would like to request this feature in a future Waveforms3 update. Thanks!
  19. Hi, I am new to this forum. I would like to know the sample frequencies which can be set on Analog Discovery. My engineer tried to set a sample frequency and the instrument acccepted with no errors. However, then he read the frequency and noticed that the actual frequency was different from the one he tried to set. The difference may be caused by limitations on the hardware. I would be grateful if you could let me know the rules how the sample frequency is set. Thank you in advance Arito Maekawa
  20. Hi. I'm new to the forum and before purchasing an Analog Discovery USB scope, I want to confirm there is support for mac OS X 10.10 (Yosemite). Thanks in advance.
  21. I bought my Analog Discovery about a year ago, and installed Waveforms to drive it. I assume the software has been updated since then. How can i determine the version of my software, and how can i then update it? Thanks in advance
  22. Hello guys, I have a problem to configure the digital output of my Analog Discovery with a custom designed/programmed signal. I can handle the fundtions given in Waveforms and watched the tutorials. The plan is to generate a PWM with the device in C++. As compiler I am using CodeBlocks. I tried to generate a sine, which is given in the samples of waveforms, but right there I am stuck. I included the samples.h and managed, that the dwf.h is included. In Waveforms itself I only can import .txt files. Because of that I think I have to connect with the Analog Discovery with the commands out of the "WaveForms SDK Reference Manual". After building the sample sine signal, my compiler gives me the error, that something in the dwf.h is noch correct. The compiler is confused by the expression "DWFAPI" in every line in dwf.h. The error message is: "expected identifier or '(' before string constant". I could not find a tutorial fiiting my problem, so I hope to find some answers or solutions right here Thanks for help!
  23. camelCased asked for a comparison of the Analog Discovery to Saleae devices on our Analog Discovery Quickstart video. Since the Saleae logic devices seem to have a lot in common with the Analog Discovery, It may be valuable to do hear some technical comparisons. Both devices use freely-downloadable software; how do these programs differ from each other? From a quick look at the Saleae website, Digilent devices seem to have far superior support matierial. However a more comprehensive review is needed to fully understand how these products compare to one another.
  24. Is it possible to use the Analog Discovery to analyze a CAN bus? CAN_L = 0v, CAN_H = 5v, for a 0. CAN_L = 2.5, CAN_H = 2.5 for 1. Typically operates at 1mbaud
  25. I dug into the Device/Manager section of WaveForms that shows a list of available firmware capability configurations. I was wondering if there are additional configurations that are available? I currently have four of them. What I was specifically looking for is a configuration supporting more logic analyzer memory depth. For example, the capability with 16ch @ 16K samples also supports the signal generator. Is there possiblly a configuration that is geared only to the logic analyzer that could possibly use the 16K assigned to signal generator? Or possibly an option for 8ch with more memory? I am not sure if these are technically feasible but since the Analog Discovery is based on an FPGA I was hoping it could be done. An increased buffer depth would be great! Thanks for the time and help.