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Found 12 results

  1. Hello, I am currently using the Analog Discovery 2 with the following set-up (Two first pictures). The two resistors used here are both 10 kOhm resistors. Using the "W1-C1-DUT-C2-R-GND" mode, I obtain the following curves third picture). As you can see, when the frequency increases, the phase becomes negative. Using the W1-C1-R-C2-DUT-GND, I obtain the following curves (fourth picture). The set-up has been unchanged but the phase now increases with the frequency. This can be summarized with the following picture. (fifth picture) Is that normal? Isn't the phase curve supposed to be the same in both cases? Another question I get concerns the Analog Discovery Impedance Analyzer. The datasheet says that a warning is shown when the ratio between the two resistances exceeds 25%. However, as you can see (6th picture), I only get the warning when this ratio is around 96,5%. Is that normal? Best Regards
  2. Hello, I want to learn compensation values (open resistance, open reactance, short resistance and short reactance) of a compensation action. How can see these values? Trace export contains probe resistance and reactance values. There is no data about compensation values. I need them to verify my design. There is a python script named as "AnalogImpedance_Compensation.py". I reviewed this script. But, This script does calculate resistance and reactance values according to single frequency and single resistor value. How can enhance the script to grab same compensation values like WaveForms does it with multiple frequencies and multiple resistors. Could you guide me? I realized that each application restart reset compensation values. So, it requires a new compensation action. But, I can retrieve same compensation values if I save the workspace. So, saved workspace contains previous compensation values in it. How can reach them? Regards, Resul
  3. Hello I'm new to the waveforms environment. I'm using the impedance-analyser module along with a Discovery 2 and would like to run continuous impedance analysis on samples where the impedance will change over time. Consequently, I would like to save/export the data from each consecutive sweep across my chosen frequency range (as I leave it to run). Currently, it would seem like only the most recent pass gets stored. How could I go about saving/exporting each pass? Apologies if this is the wrong part of the forum for this question. Kind regards AML
  4. Hi All, I am developing a custom application using Analog Discovery 2 and Impedance Analyzer Adapter. I am trying to implement C-V measurements. WaveForms chart is different from my application with the same parameters. I wanted to investigate the difference with writing python scripts which is the same logic with my custom application. Here is the WaveForms screenshot with the same DUT configuration and Python script plot. They have some configurations but the plots are so different. Peaks are similar. But, They look really different. DUT: 1N4007 Diode. What is the reason for the difference between charts? WaveForms charts are smooth. Do WaveForms have extra configuration or techniques under the hood? Please see the charts and the script file. Regards, Resul AnalogImpedance_CV.py
  5. Hi, There is an option on the Options menu called Samples. I want to increase the number of samples in capture at each frequency step considering resolution and accuracy. But, it really slows down the measurement process. My question is that how Waveform software can handle such high samples with very little effect. Do you handle all samples on the device at each frequency step without retrieving the PC software side? If yes, are there any API functions to achieve the same task?
  6. Hello, I can successfully communicate with my Analog Discovery 2 device. I can send and receive data. I want to build a custom LCR Meter using Analog Discovery 2 and Impedance Analyzer Adapter with C#. I need CC/CV measurements too. Waveforms have built-in support for these measurements. But, I inspect the Waveforms SDK Reference Manual and all scripts in the Examples folder. I can not find a clue to how to achieve my goal. I want to learn how can we set "mode" with code. There is only the FDwfAnalogImpedanceAmplitudeSet function. There is also a "Custom" mode. There are five scripts that are 1. Constant Voltage Adapter 2. Constant Current Adapter 3. Constant Voltage 4. Constant Current 5. Offset Sweep I am using IA Adapter. So, I investigate Constant Voltage Adapter and Constant Current Adapter scripts. I think I need to use these scripts as a reference. But, these scripts use some variables such as VRMS, IRMS. I see the function to retrieve Voltage and Current. But, I need VRMS and IRMS values. How can I read these values from the device? They are built-in in scripts. Thanks In Advance, Regards Resul
  7. I have Analog discovery2 and impednace analyzer. Can this device measure the inductance, quality, and DCR of a wireless charging coil? If measurement is possible, I would appreciate it if you could tell me how to measure using waveforms 3.12.2. Please tell me how to set the test condition of 100khz/1V in waveforms like the last picture.
  8. Hey, a part of my project is to work with an impedance analyzer circuit with the next parts (pictures of the parts are atached): AD5933YRSZ-ND AD8086ARZ ADG849YKSZ-REEL-7CT-ND ADP150ACBZ-3.0-R7CT-ND Which board and equipment do I need for work with thus chips? Kind regards, Aviad
  9. Hi, I am using example code that I got from GitHub to try to read the impedance through Arduino. On the reference guide that digilent provides, there are a series of steps you have to take to calculate the correct impedance. All of those functions are already written, but I do not know how to calibrate the AD9533. I know it says something about a reference resistance, phase, etc., but I am unsure if I am supposed to put the reference resistance in between the SMA connectors and then once it has done a sweep to calculate the gain factor. Am I supposed to insert the reference resistor first, then take it out post-calibration? Am I then able to measure unknown resistance? Help please! Best, J
  10. Hi all, I am using the Impedance Analyzer board for some measurements. The Waveforms Software has the possibility to do an open/short compensation over the desired frequency range. So far I can do the compensation and I get nice results. For my actual application I am using Visual Studio and C# to write the software with the help of the SDK manual. This works also fine so far. But now I want to do the open/short compensation from there as well. There are some commands in the SDK manual like FDwfAnalogImpedanceCompGet(HDWF hdwf, double *pohmOpenResistance, double *pohmOpenReactance, double *pohmShortResistance, double *pohmShortReactance) that should give out exactly the parameters I need. Apparently, If I do that just after doing an open/short compensation in Waveforms, my program cannot read those parameters. Where are the parameters stored? So far I know I can save Waveforms Projects and recall them in Waveforms to get the compensation function again. How can I access the stored parameters from my Visual Studio C# program? Can I export compensation parameters from Waveforms? Thank you for your help in advance. Lea
  11. I am trying to make precise measurements of capacitance in the <100pF range. I am using the Impedance Analyzer board for the AD2. I may be asking too much of it but it seems to not represent the true capacitance variation with frequency. In measuring a 33pF COG disc ceramic, which I expect to have a constant capacitance, at least over 1lHz to 10kHz, I note that there is a change in the value with frequency of 0.1pF (~0.3%). Is this a realistic result? I am using 1 MOhm loading resistor.
  12. I'm a new Discovery 2 user that's trying to measure impedance. I running Waveforms 3.10.9 Windows 10 64 bit. I made a simple circuit with a 2k R as DUT W1 C1 2k R C2 1k R GND and ran a 1k compensation shorting W1, C1 and C2 to one side of the 1k R and GND to the other side and open with all unconnected. Doing a low frequency sweep from 1 kHz to 10 kHz I see results like Rs: 29.9 k Xs: -46.8 k theta: -57 at 2 kHz. Any ideas why this is so far off?
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