Development History¶

2014/01/23¶

Release the package into the wild.

2014/08/09¶

The demodulate.py file has undergone a major rewrite!

The “quickstart” files are essentially all broken. You may instead see how the new code works by running, at the command line, from the home directory of the package
```
python freqdemod/demodulate.py --no-LaTeX --testsignal=sine
python freqdemod/demodulate.py --no-LaTeX --testsignal=sinefm
python freqdemod/demodulate.py --no-LaTeX --testsignal=sineexp
```
Running these commands will bring up a number of windows. You will have to click each window closed before the program will proceed and show you the next window. Each window should have a pretty self-explanatory title I hope. You can try the --LaTeX option to see all the plots in fancy LaTeX typesetting.
All the data is stored as an HDF5 file. If you have the h5py package installed correctly, you should have available the h5ls command line program which is useful for inspecting the contents of HDF5 files. Each of the above programs saves its data to a hidden HDF5 file. You can see the files by running at the command line
```
ls -ha | grep h5
```
or simply looking for the files that start with a dot, ., and end with .h5. To examine the contents of the HDF5 files produced by running
```
h5ls -rv .temp_sine.h5
h5ls -rv .temp_sine_fm.h5
h5ls -rv .temp_sine_exp.h5
```
The code is only lightly documented. To get an idea of how things work, start by looking at the functions
```
testsignal_sine()
testsignal_sine_fm()
testsignal_sine_exp()
```
in the demodulate.py program.