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Signals originally was a DOS program that was written by Professor Roger Easton, though a version for Windows is being written and is now available for beta testers.
Signals allows the user to generate one-dimensional complex functions, process them in various ways (histograms, Fourier transforms, convolutions, etc.), and graph the results.
The DOS version has been run in nearly all versions of Windows with no difficulty. If run in Windows, the program runs in a normal DOS Window for text input, but switches automatically to a full-screen graphics display when necessary. The program then remains in full-screen model until the program closes or the user manually switches to a normal window by simutaneously pressing the "ALT" and "Enter" keys. The user may switch between these two modes at any time via , but the graphic display is "frozen" when viewed in a normal window". Graphics screens may be captured to the Windows Clipboard by pressing "PrtScn", and thence pasted into graphics applications.
Signals for DOS: Four files are generated: the executable file "SIGNALS.EXE", a short text documentation file "SIGNALS.DOC", an icon suitable for use in Microsoft Windows ("SIGNALS1.ICO"), and the Microsoft Hercules Graphics Driver ("MSHERC.COM"), which must be run before the program if using a Hercules monochrome graphics card. To run this in Windows newer than XP (XP works OK) or other modern operating systems, you will need the free DOSbox download. See this page for more details.
Download Signals for DOS (Self-extracting ZIP file)
SIGNALS Online Manual
Signals for Windows The beta version of Signals for Windows is also available. Please forward any comments, questions, or bug reports to Roger Easton.Download Signals for Windows, Beta Version 2 (Zip File, updated 17 June 2004, 140 MBytes)