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Author Topic: Dolby CAT150E Michael Harlow Expert Film Handler Posts: 170 From: Faversham, Kent, UK Registered: Jul 2002 posted 12-07-2003 11:16 AM                     Ok, That Peter Hall at Future Projection is going to put a CAT150E card in my CP55. What does a CAT150E do? Peter hasn't come back to me yet, he's a busy man! Thanks  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-07-2003 11:25 AM                     The Cat. 150E is the second to last version of the Cat. 150 card line. The Cat. 150 is the matrix decode (aka 2:4 decoder) in analog Dolby Cinema Processors ending with the CP-65. The Cat. 150F replaced it for cinema use but the Cat. 150E is still current for the Pro-Audio SDU4 deocder due to its increased dynamic range (pro audio is referenced to +4dBu as opposed to Dolby's 300 or 500mV "standard.") Your CP-55 should already have a Cat 150 of some vintage (the CP-55 started life with the Cat 150C...a B with LEDs) unless it was a CP-55M in which case there is a Cat. 327A in there now. In short the Cat. 150E (or F) will either repair any matrix decoding problems you may have or improve the quality of the decoding you may have. Steve  |  IP: Logged Michael Harlow Expert Film Handler Posts: 170 From: Faversham, Kent, UK Registered: Jul 2002 posted 12-07-2003 03:46 PM                     Many thanks for explaining that Steve, He is going to mod our CP55 for split surround so i guess this has something to do with it.  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-07-2003 04:05 PM                     The Cat. 150E has no bearing on the split surrounds. You will be getting a Cat. 441 though that will add the Rs channel and a cheesy EQ. Steve  |  IP: Logged John McConnel Expert Film Handler Posts: 118 From: Okmulgee, OK USA Registered: Nov 2003 posted 12-07-2003 05:22 PM                        Does optical sound offer split surrounds now?  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 12-07-2003 06:10 PM                     No.  |  IP: Logged Frank Angel Film God Posts: 5305 From: Brooklyn NY USA Registered: Dec 1999 posted 12-08-2003 01:54 PM                        Not unless you run it through a stereo synthesizer like we do...heh heh.  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 12-10-2003 12:26 AM                        Hi - The "E" stands for "extremely good value" ! Your CP55 has a cat150D in it (ot maybe a B, in which case you will notice a hell of a change), which is fine but no where near as defined as the 150E. The E uses chips, in general the D uses Caps. (Well, sort of anyway) but the E sounds a lot better. Thought I'd bring one down and loan it to you for LOTR - as we're putting surround in I didnt want the initial response to the surrounds to be restricted by the performance of the card.. Is a blatant marketing ploy by our good selves - once you've heard the E you wont want to go back to the D. Sort of like making syre the car you take for a test drive has leather seats !! See you tomorrow  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 12-10-2003 09:29 AM                     The D still makes use of the older Tate chips The E uses the Sanyo Prologic chip driving a pair of external VCA's the phillips TDA1074's Also the D uses an analogue bucket brigade time delay the E and later does the dealy in dsp  |  IP: Logged Peter Hall Master Film Handler Posts: 314 From: London, UK Registered: Dec 2000 posted 12-10-2003 10:00 AM                        Gordon - You are far cleverer than I !! No wonder Stuart speaks so well of you !!  |  IP: Logged Steve Kraus Film God Posts: 4094 From: Chicago, IL, USA Registered: May 2000 posted 12-10-2003 10:04 AM                    Is the E fully DSP or just the surround? Is there no escape from this digital madness? How do they implement 2:4 decoding on the Panastereo?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 12-10-2003 10:19 AM                     The time delay is the only dsp section on the 150e The Panastereo and most other matrixs use descrete components to do the logic steering They have also one of the cleaverest ways around the VCA issues as well  |  IP: Logged Stephen Furley Film God Posts: 3059 From: Coulsdon, Croydon, England Registered: May 2002 posted 12-10-2003 10:45 AM                     When was the change from the delay being on a separate card attached to the decoder card to it all being on a single card made? Was that when the delay went digital?  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 12-10-2003 12:13 PM                     The 150E was the first single card decoder The 150F use the analogue devices single chip set (same as in the cp45) and it has lower headroom than the 150E so not advised for Printmasters As to the split surround issue the circle surround matrix can handle a split surround optical as could the original pentoptical card design (hence the pent for 5 channel) The vector corrodinates of the matrix can be altered to get any channel position you want but channel seperation degrades the farther you are from opposing channels being 180 degrees apart  |  IP: Logged Christopher Seo Jedi Master Film Handler Posts: 530 From: Los Angeles, CA Registered: Jun 99 posted 12-10-2003 12:34 PM                     Very interesting, Gordon. So was split surround ever actually utilized for optical? Does this have anything to do with Dolby's Pro-Logic II?  |  IP: Logged

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