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Found 10 results

  1. renesas_an1560_making_noise_measurements_pgs_1-3.pdfI have a noise test setup that is measuring the en noise of jfets and is gaining it by 1000x to the AD2. What tools exist in the AD2 - likely either scope with FFT or the SA where I can get reported the rms voltage value over frequency and the number of samples taken for the RMS. I don't want pk-pk as it requires more work and samples to be meaningful to the analog circuit designer - me. Please provide a best practice method as I am struggling at this time. An alternate can be to move to another piece of test equipment if this isn't an intended feature of the AD2. Thanks, Tim agilent_nz_5989-9087EN.pdf
  2. Hello, I just would like to ask how to generate White Noise from Analog Discovery 2 with 5V pk-pk Thank you in advance. Yani
  3. hi im running a spectrum on an audio amplifier, i cant seem to get lower noise than circa -70-75db im i doing something wrong or is this the lowest i can expect?
  4. Hello all, I am having some trouble with noise from the waveform generator on the electronics explorer board. I have made an op-amp, but the output is very noisy, I thought it was my circuit at first, but it seems the input signal itself is noisy. Noisy in, noisy out. If any of you know of a solution to this problem I would greatly appreciate it. I have attached images of the the oscilloscope readings as well as the inputs I am supplying to the circuit. Thank you for your time, - Micah
  5. As already mentioned in your FAQ, there are some issues with noise/peaks on the oscilloscope channels of the OpenScope. In the example (OpenScope_Peaks.png) you can see distortions of up to 200mVpp. The test setup: Ch1: connected to DC1 @ 157mV Ch2: shorted to GND OpenScope is powered by a 5V USB power bank I noticed, that the distortions can be completely eliminated by touching the PCB antenna of the MRF24. It seems to work equally well if you tape down one of the insulated ground wires onto the PCB antenna. or keep protective earth close to the outer edge of the PCB antenna (e.g. between two layers of insulating tape).
  6. Hi all, I've run into an unexpected problem. Issue It seems that when I use both scope channels within the same circuit (at least for this circuit) I get tons of 60Hz noise and its harmonics. Using a single channel does not generate this kind of noise. Setup I am using a 3 channel DC supply plugged into 60hz wall power that feeds my breadboard circuit in two areas. My breadboard circuit is a simple non-inverting op-amp whose input signal comes from a constant current source excited thermistor. The gain is ~ 30 V/V. I'm using the Analog Discovery 2. Details Normally, I've been using the either channel to check my pre or post-amplified signal. This single channel behaves normally. Nice low frequency temperature response from my thermistor. However, upon adding the other channel to look at the opposite end of my op-amp circuit, I get tons of 60Hz, 120Hz, etc. garbage. Advice? Regards, Eric
  7. Performing the initial "Getting Started" "Step 7: Take a Measurement" at 1V@20kHz 'looks' as expected, but at 20mv@20kHz tremendous noise is visible and it gets worse at lower voltages. The noise is there at higher level signals, e.g. > 50mV but it's just harder to notice on the oscilloscope. The result is the same with factory and local calibration. Unchecking the oscilloscope channel's "Noise" checkbox does not help. Is this device defective or is this a product limitation? Could you please advice on how to get a clean low level signal? Platform: USB powered Mac installation on a MacBook Pro under OSX 10.11 Attached PDF: window shapshots of WaveGen and Scope at 1V and 20mV; picture of AD2 connections. AD2 signal noise.pdf
  8. 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,
  9. Just find and share a good project done by Mitch Gallant. It is powered by Analog Discovery http://www.jensign.com/NoiseMeasurement
  10. 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.