josuem / frequency_sweep

Frequency Sweep

Description: This code performs a frequency sweep using two instruments: AFG_2225 and MSO7024. It uses PyVISA library to communicate with the instruments and generates a CSV file for each frequency with the corresponding sample rate.

This program performs a frequency sweep using an MSO7024 oscilloscope connected via USB. The initial, final and increment frequency are defined by the user in the start_frequency, stop_frequency and d_frequency variables, respectively. The voltage and waiting time are also defined by the user in the voltage_source and time_waiting variables. The data is saved in a folder called "data" on drive D.

Libraries

You need to have installed the NI-VISA API in your computer for run this code.

Python

Install the requirements.txt file using conda:

conda install --file requirements.txt

The following libraries are imported in the code:

• pyvisa
• time
• os
• numpy as np
• tqdm
• datetime
• pyfiglet

Global Configuration

The following global configuration parameters are defined in the code:

• start_frequency: The starting frequency (in Hz) for the sweep
• stop_frequency: The stopping frequency (in Hz) for the sweep
• d_frequency: The increment frequency for the sweep
• voltaje_source: The voltage source (in V) for the oscilloscope
• time_waiting: The waiting time (in seconds) between measurements
• sample_rate: The sample rate of the oscilloscope, defined as memory depth
• time_base: The time base of the oscilloscope (in seconds)

Main Loop

The main loop of the program performs the following steps:

• Clears the oscilloscope screen
• Sets the parameters for the AFG2225 and MSO7024 devices
• Ranges through the frequency values defined by start_frequency, stop_frequency, and d_frequency.
• For each frequency in the loop:
• Sets the frequency for the AFG2225 device
• Runs the oscilloscope measurement
• Sets the time base and sample rate for the MSO7024 device
• Triggers the oscilloscope measurement
• Stops the oscilloscope measurement
• Saves the sample rate for each frequency in an array, vec_sample
• The data is saved to a folder called "data" on drive D.