Fork of the DS1054Z_BodePlotter adapted to use Feeltech FY6900 or similar signal generators.
Tested with Anaconda 2020.11 on Windows 10 20H2
A Python program that plots Bode plots of a component using a Rigol DS1054Z Oscilloscope and a FY6900 DDS Generator.
A Bode plot shows the frequency response of a system plotted in a phase and a amplitude graph.
DS1054Z_BodePlotter needs a numpy/scipy/matplotlib environment. Under Linux Distros you can install these via package manager (See here for more informations). Under Windows you can use Anaconda.
Further you will need to install pyserial, DS1054Z, and (optional) zeroconf. You can do this via pip:
pip install pyserial ds1054z zeroconf
On windows install Anaconda, open Anaconda Prompt and execute:
pip install pyserial ds1054z zeroconf
Connect your Feeltech FY6900 AWG via USB with you computer and connect the DS1054Z to network (via Ethernet port). Tip: Use a router to comunicate with your scope and assign a static IP to it.
Connect the Channel 1 output of the FY6900 to CH1 of the DS1054Z and to the input of the component you want to test (DUT = Device under test). Connect CH2 of the DS1054Z to the output of the DUT.
The basic syntax is python bode.py MIN_FREQ MAX_FREQ [FREQ_COUNT], so if you, for example, want to test your DUT between 1kHz and 2.2Mhz, with 100 steps (default is 50),
you can do it like this: python bode.py 1e3 2.2e6 100.
If you have installed zeroconf, the program will try to find your Oscilloscope automatically, if not you will have to specify the IP via the --ds_ip option. Mostl likely you will also have to specify the serial port of the JDS6600, you can do this with --awg-port.
By default only the Amplitude diagram is measured and plotted. If you also want to get the Phase diagram, you will have to specify the --phase flag.
If you want to use the measured data in another software like OriginLab or Matlab, you can export it to a semicolon-seperated CSV file with the --output option.
So a typical command line would like this: python bode.py 1e3 2.2e6 100 --ds_ip 192.168.1.108 --awg_port PORT --phase --output out.csv
PORT is something like COMX on windows,
/dev/ttyUSBX on linux.
By default the amplitude plots are shown with linear voltage scale. If you want to get logarithmic axis you can switch this in the plot windows under Figure options.
If you want more accurate results you can use the discrete Fourier transform on raw data with --use_dft
To see the full list of possible options call python bode.py --help.
On windows launch commands from Anaconda Prompt.
Here are some example measurements:
This program is licensed under the MIT License. See LICENSE file for more info.
The FyGen.py library was taken from https://github.com/mattwach/fygen