Altium Designer 6 (Formerly known as Protel DXP 7) is a huge and expensive software package used for drawing circuit schematics and laying them out as printed circuit boards.
Known bugs and tricks:
You'll need Daniel Sigg's library of parts ([http://ilog.ligo-wa.caltech.edu:7285/advligo/AltiumLibraryDaniel LIGO_sigg.IntLib]) to manipulate any schematics that have come from Hanford.
- (Ver 6.7.9346) When placing multiple sheet symbols corresponding to the same underlying design, or trying to do a multi-channel repeatition of a sheet symbol (using REPEAT), Altium will not notice the duplication of the sheet part if it has no ports.