After receiving questions from a spectrum lab user who intends to
upgrade from a rather old version of Spectrum Lab to the most recent
one, this note may be important for others, too:
If you are using Spectrum Lab for a very 'specialized' application, keep
a backup copy of the old version !
In the past, some very exotic functions have been removed from Spectrum
Lab because I had assumed that no-one (except myself) had been using
them. Just two example:
- there once was an IIR filter designer for lowpass, highpass, and
bandpass audio filters built inside the program. This has been removed
years ago (in favour of the FFT-based filter).
- there once was a function called 'Alert Module' in the program. It
could alert the operator (by switching a signal on the serial port's
output line) when "something interesting" was detected, for example the
appearance of a signal at a certain frequency, etc. This has also been
removed years ago (because it can be replaced with the 'Conditional
So, again, before updating from a 'very old' version, please make a
backup copy of the old version including your configuration files (*.usr
/ *.ini) .
Have a nice sunday,