[*]Roof Filter ... (so why "Roof"? Don't know - maybe a signal processing term? ...
Hi DdlV,
No, IMO no signal processing term. I remember that Ehlers mentioned somewhere that he called this a Roofing Filter because it's basic intention was to protect other indicators from unwanted signal frequencies. A protection like a roof, only letting the desired frequencies through the window of the pass-band.
Cheers, simplex