darwinne / bk2034_gpib Goto Github PK

Currently, the 1/3 of octave analysis for very low frequency done by octave.c is affected by a huge error, since only one spectrum is acquired between 0 Hz and 6.3 kHz. It would be better to acquire the spectrum twice, one below 800 Hz to have a good representation for low frequencies, and one up to 25kHz, to have information on all the audio band.
The acquisition should be done automatically and data gathered during the two passes should be blended together.

Complete README file with meaningful information.

The output file is left open!

At the beginning of the execution, just before launching the acquisition, the control software should ask wether calculations and results should be based on the Power Spectral Density (PSD) or on RMS value. The first case is meaningful with noise analysis, the latter with signals whose spectrum has energy concentrated in discrete lines.

Import the code which has already been written in this repository using GIT.

During the impedance measurement, the signal generator should be switched on, configured to "pseudo random noise", an automatic setting of the input sensitivity should be launched, before waiting for the measurement.
With pseudo-random noise, it is better to sync acquisition of ch. A and B to the signal generator and use a rectangular windowing function for the FFT.

The measurement units shown by the "octave" utility should be coherent with the measurements done. dB/YREF*Hz for PSD measurements, dB/YREF for RMS and dB for H1 and H2 (check that!)