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Found 7 results

  1. Hello together, I've got a question about the Analog Discovery 2: What is the maximum output current of Wavegen channels W1 and W2 to ground? Background: I want to connect an LED (in series with a 220 ohm resistor) to a sinusoidal signal of 1Hz (Offset: 2.5V, Amplitude: 2.5V). If I now display the voltage on the oscilloscope, the curve is cut off at around 4.6V. I believe that the AD2 cannot provide the necessary current from 4.6V. Best regards, Johannes Weiß
  2. I want to output a stereo Signal on wavegen. W1 is working as expected but W2 gives no Signal on oscilloscope. The hardware is tested with Waveform tool and it is fine. I can output two different custom signals on W1 and W2. The SDK is up to date. I assume to have a fault in initialisation of the channels. See the code is in the attachment. The problem is in play_Digilent() method. A working example to output a custom signal on both channels would be very helpful. record.py
  3. Hello. I have been using the Analog Discovery 1 (legacy version) as a portable oscilloscope and function generator. I am using the Wavegen as a function generator to test an analog front end (AFE) which includes an integrated instrumentation amplifier and an ADC (http://www.ti.com/tool/ADS1293EVM). Trying to characterise the performance of the AFE, I used the Analog Discovery's function generator to generate sine waves of different amplitudes (between 1mV and 100 mV pk-pk) and frequencies (between 40 and 200 Hz, in steps of 40 Hz). The gain of the instrumentation amplifier is fixed at 3.5 and the bandwidth of the AFE is programmable (ranging between 170 Hz and 340 Hz). I find that the gain of the system varies with frequency and is either 1 or slightly higher/lower than 1, depending on input voltage and frequency. I did not include any load resistance in my measurement circuit since the internal impedance of the voltage generator was 0 (as mentioned in https://forum.digilentinc.com/topic/3203-analog-discovery-2-waveform-output-impedance/ and https://forum.digilentinc.com/topic/18292-impedance-for-analog-discover-2-itself/#comment-47859). I would like to know if it would be necessary to include any load resistance while using the AWG as input to an instrumentation amplifier. If this is not the reason, what could be the reason for this mismatch in gain/amplification factor? I have posted a query in the TI forum (link: https://e2e.ti.com/support/data-converters/f/73/t/898470). I have also attached the WaveForms workspace file I used. Thanks in advance for helping out with this. Best regards, Ganesh Load-resistance-test-2020-05-27.dwf3work
  4. I am finding that if I set the sweep time to anything over about 20ms, the sweep winds up corrupted. Have updated to current (3.12.2, 64-bit) - no change. Please advise.
  5. I recently tried to calibrate my AD2 and ran into some issues when I reached W2 gains. I read on my personal DMM 5 volts when it should have been 1 or 0. I then applied the wave to my oscilloscope and even the oscilloscope of the AD2. It was a static 5 volts no matter what wave I changed it to be. I tried using the fly wires to see if my breakout board was faulty, but it seems that my AD2’s wavegen 2 does not work. I was wondering if there was something that I could do to fix this or contact digilent themselves. Thank you in advanced!
  6. Hi. I am a complete novice to Waveforms and have just installed in DEMO mode on my MacPro (2013). The installation went perfectly and I opened up the Waveform generator (Wavegen), confirmed a 1kHz sine wave and looked around Waveforms for a way to output this to my Rigol DS1054Z. Then, I tried all the options in preferences and at the bottom of the graphical display; but I could not get the signal I generated (any sound) on my speakers (to confirm it was working as expected) before sending the signal to my external RIGOL scope. I did a quick search on the net and could not find anything that directly addressed getting this simple test setup to work; and so my apologizes for the intrusion and asking such a novice question. How to I send the Waveforms generated waveform output to an external device via my audio port (or USB port) to my RIGOL scope? I assume these generated waveforms cannot be directly output to a digital scope until we add a DAC to the output? Thanks for your help.
  7. Hi Guys, I'm new to the AD2 & Waveforms, and in the need of some help. I'm trying to import a csv file into a custom wavegen and then output it. Here is my code: if(!('Wavegen1' in this)||!('Scope1' in this))throw"Please open a Scope and a Wavegen instrument"; var filename = "/Users/PaulBritten/Documents/AFWorkMain/AFWork/Waveform/single_qrst_improved_twave_1khz.csv"; var file = File(filename); print("exists? " + file.exists()); var arr = file.readArray(); print(arr); Wavegen1.Channel1.Mode.text = "Custom"; Wavegen1.Channel1.Custom.Type.set("MyWave", arr); Wavegen1.Channel1.Custom.Type.add(arr); Wavegen1.Channel1.Custom.Offset.value = 0; Wavegen1.Channel1.Custom.Frequency.value = 1; Wavegen1.Channel1.Custom.Amplitude.value = 1; Scope1.Trigger.Trigger.text = "Repeated"; Wavegen1.run(); Scope1.run(); Can anyone explain to me why I'm getting this error: Thanks for any help in advance. Best wishes Paul
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