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Author Topic: Cat 158 replacement in CP200 by Showscan Serge Bosschaerts Film Handler Posts: 70 From: Schoten, Belgium Registered: Jan 2000 posted 10-23-2006 10:56 AM                        In the Aux unit of my CP200; I found that the cat158 card is replaced with a card made by Showscan. It says 'Discrete Stereo Soundboard','Replacement board for cat158 Dolby CP200'. What's the function of this card ? Serge  |  IP: Logged Robert Minichino Master Film Handler Posts: 350 From: Haskell, NJ, USA Registered: Dec 2005 posted 10-23-2006 11:43 AM                        The original Cat 158 took the Le and Re tracks, high-passed them, added in the S track (original Todd-AO mono surround), and sent them out; it low-passed Le and Re, summed them (because they originally contained subs on Dolby 70mm mag), and puts it out on the sub channel. My best guess is that the card you've got does away with the extra low/high pass processing and routes Le/Re directly to Lb/Rb (P/Q).  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 10-25-2006 07:13 PM                     I met the man that modded that CP-200 today at Showeast and he asked me to post the output mode for you here. Also check the CAT 153 70mm switch card for other mods he may have made to that diode matrix to get the 158 card to switch the way it now is. It can easily all be put back to normal if you want to... or de-Showscaned so to say. He also mentioned that the low pass switch still should work on the 158 and it functions at 40 hz in one position. The outputs of the 200 should be as follows.... 1=L 2=LS 3=C 4=RS 5=R 6=Sub I hope I got his wording correct but if not he will probably see it and let me know if it needs changing.  |  IP: Logged Serge Bosschaerts Film Handler Posts: 70 From: Schoten, Belgium Registered: Jan 2000 posted 10-26-2006 08:52 AM                        Ok, thanks Mark, just checked the 153 mag card, has not been modified. The Aux unit came I suspect from another CP200 when I bought it. Serge  |  IP: Logged Richard Hamilton Phenomenal Film Handler Posts: 1341 From: Evansville, Indiana Registered: Jan 2000 posted 10-26-2006 01:17 PM                     quote: Mark Gulbrandsen I met the man Mark, I thought you were "The Man"  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 10-26-2006 02:43 PM                     Na, Richard you are definately da man... I'm just da man caught in da middle. Mark  |  IP: Logged

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