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Found 114 results

  1. mustafayilmaz

    Real signals

    Labview very complicated for analog discovery. I want to process real signals simply. İs there any way Analog discovery scope using as analog input/output? (And digital signals) Like this :
  2. Hello, I am a new user of analog discovery. I have an Arduino talking to my sensor through a 5v to 3.3 V level converter using I2C protocol. The code works fine and gets me the desired output on the serial port but when I try to connect the SDA and SCL lines to the analog discovery on the pin 7 (Data) and Pin 15 (clock) lines, I dont see any signals getting recorded. I am interested in seeing the clock and data lines with the addresses and data that is being written on the lines. But it either gives me Error status or no result after getting triggered. The snapshot is attached below: I wanted to know if I am following all the necessary steps in initializing the analog discovery. 1. Connect the wires to the 2 digital lines of analog discovery ( Pin 7,15 here) 2. Assign the right DIO pins as data and clock lines in the waveforms software. 3. Click the Red T button to set the trigger option. --> Start signal as trigger is the condition I used in the image below. but I also tried different trigger settings like, SDA = Ignore and SCL = Rising edge. Both of them gives me the error blocks as below. 3. Click Run button 4. Reset the Arduino. 5. Stop. I am interested in seeing the start, addresses in hex, ACK/ NACK signals labeled. Can anybody tell me if there is some required program to be run before I able to see them? Thanks & Regards,
  3. Hi Dear Digilent Team, A question concerning the measurement capabilities ot the Analog Discovery 2 and WaveForm software: Is it possible to measure continously and "without losses" a frequency of an analog or digital entry? Goal is to log a frequency over a long period of time between EACH following flanks Optionnaly also measure times between flanks of different channels Examples: - Measure the freq/time between each following rising flanks of a channel - Measure the freq/time between each following falling flanks of a channel - Measure the freq/time between each following flanks (rising and falling) of a channel ... Most scopes measure frequency only "around" the trigger flank Thanks for each feedback Regards
  4. I have been using my Analog Discovery to measure output signals from a 3-axis accelerometer (Adafruit ADXL377) during an impact test event. Being a 2-channel device I have to first measure the X+Y outputs then repeat the impact event measuring the Y+Z outputs. I export these data then use a bit of Python code to combine two tests into a single result whereby I calculate the total acceleration by summing the squares of each axis (X+Y+Z). I trigger the scope off the Y-axis and make the assumption that the Y-axis acceleration is the same in each of the paired impact tests (which seems a reasonable assumption for these initial tests). For any given "impact test" I repeat the test 10 consecutive times measuring the X+Y outputs then 10 consecutive times measuring the Y+Z outputs then combine these data onto 10 X+Y+Z data set for analysis. I see some differences in the combined X+Y+Z data depending on which set of Y output data is used for the combined X+Y+Z data. The impact test itself has some inherent variability so this dual measurement just adds to the "noise" so the number of experiments needs to increase in order to make the experiment results valid. It seems at first glance that if I bought a second Analog Discovery unit I might be able to simultaneously measure the X+Y outputs on unit "A" and Y+Z outputs on unit "B". I would setup each scope to trigger off the same Y output so presumably they would trigger at the same time. Has anyone tried this before?
  5. In Waveforms 2015, is it possible to set up a wave in the AWG to be triggered by every other pulse in the scope? I'm currently trying to use a 10 Hz external pulse connected to the Analog Discovery's scope as the trigger for a 5 Hz waveform from the AWG, but I need to have the event trigger only once the 5 Hz waveform has finished one pulse. Effectively, I'm putting together a slower trigger for one device that's triggered from the AD's scope using a faster external pulse. It appears that Waveforms 2015 has some logic capabilities incorporated into the software, but as I don't have a background in logic circuits I'm not even sure if the logic circuit feature can work this problem out. Any help with this will be much appreciated~
  6. Hi Digilent Im currently working on my finals in electronics development, including a hardware setup and a custom-made C++ application for my Analog Discovery 2. However it seems that the calibration data made with WaveForms does not apply to the hardware when using custom C++ applications. I've been looking through the manual and haven't encountered any examples of how it is done. I hope you can help me Kind regards Rasmus Pforr-Weiss, Brüel & Kjær SV
  7. My Laptop Operating System is Windows 10 in Chinese Version, I have downloaded waveforms software, I have connected the Analog Discovery. My laptop could detect USB Serial Converter, but the Waveforms software cannot recognize it. Showing the messages as follows: Device opening failed DptilO failed ERC:0x7 Devive configuration failed(PLL 3) Communication with the device failed. Please check the USB cable connection. For further troubleshooting consult the Help. Communication with the device failed How could I fix this problem??? Thanks a lot !
  8. Hi all, The Waveforms program installed on my 64bit, Win 10 Laptop fails to connect correctly to the Digilent devices. I have tested with an Analog Discovery 2 and Analog Discovery, both were tested in other PC's so there is no external hardware issue. As shown in the attachment, Waveforms is reading the S/N from the device and current draw is within the expected range. My best guess is that there is a USB driver issue, what are your thoughts?
  9. So I got an Analog Discovery Rev. C for one of my classes, and a little over a month ago it died. I wasn't using it irregularly or improperly, I just pulled it out during lab one day and it wouldn't power on. Is there any sort of warranty or something that Digilent provides for these devices? I have emailed them more than three times about it and have gotten no response. Any help would be appreciated.
  10. My signal looks fine as long as I don't change the offset to anything below -5V. The first picture, I have C2 at -5V and I get something that looks ok. When I change it to -5.08, it looks weird. Is there a way to avoid this? I'd like to look at C2 here at a lower V/div but am unable to center the signal due to this problem.
  11. Hello, 1. I'm just wondering if I can expect to get time sequence which has 10ns interval (ADC fs=100MHz) when I measure the Analog input from my circuit. (AD, AD2) 2. And because of 16k samples buffer, I only can measure(capture or save data) during 0.16msec (1/100MHz*16k). Is there any way to increase the number of samples to save? 3. Can I change the sampling frequency also? Best regards, Sung
  12. Hello, I have a question regarding the quality of oscillogram displayed by the oscilloscope ( the screenshot is attached). The wave generator generates slow square wave, the channel 1 is connected straight to the wavegen 1 output. But when you examine the signal you see those yellow areas surrounding the leading and trailing edges and that's a bit confusing. What is this and is there anything I can do to get rid of it? Actually, I don't believe that it has anything to do with the signal itself (but I am not an expert), I would think that this is simply how the picture is drawn on the screen. Thanks!
  13. Hi, I'm trying to measure the input impedance of my AD2 Logic analyzer and compare it to my new Digital Discovery impedance. My measurement is around 650 KΩ for the DD, however, I couldn't get any consistent result for the AD2 nor AD1. The input impedance varies between 30 MΩ and 70 MΩ. I used different techniques in my measurements, but with no success. I also looked the specs of D2/AD1 and couldn't find a figure for the Logic analyzer input impedance. Can someone please, help me find an answer or suggest a technique to measure the Logic analyzer input impedance? Thanks
  14. I'm using two Analog Discovery 2's in an embedded Debian linux environment using the python interface with my own code. I need to be able to know which physical scope I'm connecting to when I open both scopes because even though the usb assignment might change, the wiring won't. So I need to know in software which scope is which. Can you suggest a way to choose which scope to connect to? Or, failing being able to know ahead of time, what's the easiest way to know which scope I've connected to and possibly close it and switch to the other? Thanks.
  15. Dear all, I wanted to fire IGBT of my full bridge converter using analog discovery2. I wanted to change the symmetry of square wave of both channel at same time is it possible? HARIKRISHNAN
  16. So, I just received my Digital Discovery earlier this week. I've actually got a project coming up where I'll be able to make use of it, so thought I'd familiarize myself with the differences between it and the Analog Discovery. I proceeded to walk through the protocol tutorial that uses the ALS PMOD to demonstrate SPI interaction. I had never tried this with the AD2, and figured it would be a good test. Unfortunately, after checking my work multiple times, I was still only getting back 0 signals. Thinking the problem could be the DD, I tried the same thing on the AD2 with the same results. After scratching my head a few times, it occurred to me that the prescribed pin assignments looked strange. The tutorial says CS is assigned clock, and SCK is assigned to select. I went and double checked my hunch in the ALS docs, and indeed there was the problem. The tutorial incorrectly swaps these two pins. CS is (chip) select, and SCK is (serial) clock. Once I swapped the pins, all was well. Just and FYI for the content team and others who might face the same issue. Dave https://reference.digilentinc.com/learn/instrumentation/tutorials/ad2-protocol-analyzer/start
  17. I was using my analog discovery, but suddenly it no longer wants to communicate with my computer. I am assuming that the warranty is void, but I was wondering what options I have. Are there buy-back programs available? Does Digilent offer repair services for the Analog Discovery? Is it worth it to upgrade to the Analog Discovery 2? Thanks, Best wishes, - George Aguirre
  18. Trying to Reference the API in my VB 6.0 project. Does not seam to recoginize the dwf.dll that is in the C: WindowsSystem32dwf.dll I get an error saying can not reference this file when I try to reference it. I need to use the VB 6.0 enviroment since the basic code does not port to VB.net. Any advice? Does this API work with VB 6.0? Thanks Ray
  19. My trusty AD 1 seems to have developed a fault. If I connect the AD to the USB and run Waveforms and use the spectrum view I see some peaks at 13.02kHz, 26.04kHz, 39.06kHz on channel 2 that are not present on channel 1 and are not present on a different AD unit that I have. The units are both Rev C. Take a look at the attached screen capture. There is another peak at 52kHz but this is down in the noise. I have also noticed that if I generate a signal on the AWG2 with no external connections, say 50kHz, this then appears on the spectrum of the channel 2 input. If I do the same with AWG1, then nothing appears on either channel. Perhaps there is some connection between these 2 issues. Unfortunately I am looking at some small signals in the audio band and these peaks are getting in the way. I suspect that I may have somehow damaged channel 2 in the past and not realised. Does any one have any ideas where to look in the unit? I have some of the schematic from the documentation. Thanks, Kevin
  20. I recently went to use my Analog Discovery 1 and I found that it was giving me all sorts of strange results that I did not expect. I figured that the calibration must have drifted since I hadn't used the device in a year or so, but when I performed a calibration it was still significantly off. Here's a link to an album showing comparisons between the AD1's readings versus a multimeter: https://drive.google.com/open?id=0B2q6FpLmYUaVb1dQSFpIQVJYWXc . I don't really know what to do at this point, but perhaps someone here has run into this issue before and can recommend a fix. Thanks! Edit: For what it is worth, I have tried using different USB cables, different ports on my computer, different computers/operating systems, different jumper wires, and a different breadboard all to the same effect.
  21. I'm just playing around for now but in the future I have vague notions of learning music theory.
  22. I feel totally stupid, but am currently stumped. I've been using the Analog Discovery 2 for a while now. At the same time, I've had a set of the mini-grabbers that optionally go with it sitting around. I figured I'd hook 'em up today and start using them. Unfortunately, no matter what I try, I cannot figure out how to attach the probe wires to these mini grabbers. The only thing it says on the product page is that the probe contacts have to be facing outward. I've pushed, twisted, tried different angles to no avail. Does somebody have a picture they can upload that shows exactly how these buggers are supposed to be connected to the signal wires? Even a verbal explanation would help. http://store.digilentinc.com/mini-grabber-test-clips-6-pack-for-use-with-analog-discovery-flywires/ Thanks, Dave
  23. Hi, When start and stop Analog Discovery 2, a pop noise on analog output. It will appear few ms from FDwfDeviceOpen or FDwfDeviceClose function call. Since the noise voltage is + 3/-1.5V, it will exceed 1Vpp of the maximum absolute rating of the connected instrument. How can I reduce pop noise? Thanks,
  24. I am unable to make Waveforms working with my Analog Discovery on Linux. I installed Adept 2 and Waveform, when I plug my device in the usb port I have it recognized. It seems it is Waveforms that refuse to recognize the device or something bad happen as soon as I start Waveforms to the USB connection. Here is the log output when I connect the device in the USB port: oct 06 20:49:09 feynman kernel: usb 2-1.7.4: USB disconnect, device number 11 oct 06 20:49:09 feynman dbus[1324]: [system] Activating via systemd: service name='org.freedesktop.Avahi' unit='dbus-org.freedesktop.Avahi.service' oct 06 20:49:09 feynman dbus[1324]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.Avahi.service': Unit dbus-org.freedesktop.Avahi.service failed to load: No such file or directory. oct 06 20:49:13 feynman kernel: usb 2-1.7.4: new high-speed USB device number 12 using ehci-pci oct 06 20:49:13 feynman kernel: usb 2-1.7.4: New USB device found, idVendor=0403, idProduct=6014 oct 06 20:49:13 feynman kernel: usb 2-1.7.4: New USB device strings: Mfr=1, Product=2, SerialNumber=3 oct 06 20:49:13 feynman kernel: usb 2-1.7.4: Product: Digilent USB Device oct 06 20:49:13 feynman kernel: usb 2-1.7.4: Manufacturer: Digilent oct 06 20:49:13 feynman kernel: usb 2-1.7.4: SerialNumber: 210244540938 oct 06 20:49:13 feynman kernel: ftdi_sio 2-1.7.4:1.0: FTDI USB Serial Device converter detected oct 06 20:49:13 feynman kernel: usb 2-1.7.4: Detected FT232H oct 06 20:49:13 feynman kernel: usb 2-1.7.4: FTDI USB Serial Device converter now attached to ttyUSB0 oct 06 20:49:13 feynman mtp-probe[14777]: checking bus 2, device 12: "/sys/devices/pci0000:00/0000:00:1d.0/usb2/2-1/2-1.7/2-1.7.4" oct 06 20:49:13 feynman mtp-probe[14777]: bus: 2, device: 12 was not an MTP device oct 06 20:49:13 feynman dbus[1324]: [system] Activating via systemd: service name='org.freedesktop.Avahi' unit='dbus-org.freedesktop.Avahi.service' oct 06 20:49:13 feynman dbus[1324]: [system] Activation via systemd failed for unit 'dbus-org.freedesktop.Avahi.service': Unit dbus-org.freedesktop.Avahi.service failed to load: No such file or directory. oct 06 20:49:28 feynman kernel: ftdi_sio ttyUSB0: FTDI USB Serial Device converter now disconnected from ttyUSB0 oct 06 20:49:28 feynman kernel: ftdi_sio 2-1.7.4:1.0: device disconnected From 20:49:09 to 20:49:13, these messages are issued when I plug the device. At 20:49:28, these are the messages when I start Waveforms. Anyone can tell me what is wrong? Why the device get disconnected when I start Waveforms? And why do I get the device reported in the Waveforms GUI anyway? As shown on the attached screenshot, the serial number of the device is reported correctly. Any help to resolve this issue would be appreciated.
  25. Hi, I am working for an instructional laboratory where we have a number of the Analog Discovery devices that we are using as oscilloscopes. Our primary issue is triggering? We have some experiments that require at least three scope inputs and a waveform generator. We are trying to get two of the devices to sync nicely with each other using the in/out triggers, to trigger two scopes simultaneously. Much to our surprise, we found that the wavegen trigger out, is simply high when running and low when it is not as opposed to the standard TTL sync out found on most devices. Is there anyway to have the trigger out signal be TTL, similar to the Sync Out of a standard function generator? Alternatively if there is a way to make a single device act as a four input scope, that would satisfy our needs as well. Thanks