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Author Topic: Calibrating Matrix Decoder Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 01-29-2006 05:35 PM                     Let's say we have Cat 150, Dolby Pro logic or some other decoder, we got Lt & Rt inputs, L, C, R, S (optional Ls, Rs, Sw) outputs. How can we calibrate output signal levels?? Let's say like this, if we put 0dB level pink noise tone on input, what level of signals must be on outputs?? I think you get point what i want to ask!  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 01-30-2006 08:38 AM                     I would assume that its a unity gain card or very close to it although I have never personally measured the output of one to be sure. It is possuble that the sterring might cause a slight gain difference but again measuring one is the way to really find out. Mark  |  IP: Logged Christos Mitsakis Expert Film Handler Posts: 242 From: Ag.Paraskevi, ATHENS, GREECE Registered: Sep 1999 posted 01-30-2006 10:58 AM                     Marin, setting card's output levels or the actual LCRS sound level in the theatre?  |  IP: Logged Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 01-30-2006 12:29 PM                     Yes, I'm interested in card (decoder) output levels, not auditorium levels!  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 01-30-2006 10:44 PM                     there is no output level adjustment on the older cat 150 cards the schematic is in the cP50 manual on line here  |  IP: Logged Marin Zorica Jedi Master Film Handler Posts: 671 From: Biograd na Moru, Croatia Registered: May 2003 posted 01-31-2006 06:06 AM                     No, i don't mean for cat 150's, but i mean basically how to set any kind of decoder?  |  IP: Logged Alan Lyman Film Handler Posts: 13 From: Copenhagen, Denmark Registered: Aug 2000 posted 02-16-2006 01:41 AM                     If I remember correct,from when I was messing with this,then the L+R channels is unity gain,and the C+S is +3db  |  IP: Logged

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