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Author Topic: Exciter to Red Light Reader installation question? Stephen Frazza Expert Film Handler Posts: 161 From: Nutley, NJ, USA Registered: Mar 2004 posted 02-24-2005 02:15 PM                        If was to install a BACP RSTR 2000 in place of a exciter bulb and how the test film to do it but had to wait a few days for a RTA to align it would it be ok? Would there be any drastic EQ change needed or could you get through a weeekend. If there was any big change is there anything you could do in the meantime? It is on a simplex 5 star and a Dolby CP 55.  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 02-24-2005 02:51 PM                     If you are saying you DO have all of the test films AND an oscilloscope and you had an cyan print that required the upgrade for this weekend (just making sure), then yeah you could make it passable. Just do everything else and don't touch the slit loss controls on the preamp card.  |  IP: Logged Michael Schaffer "Where is the Boardwalk Hotel?" Posts: 4143 From: Boston, MA Registered: Apr 2002 posted 02-24-2005 04:42 PM                        If you listen to the pink noise very carefully and adjust the lens for the "brightest sound", you should be able to find a somewhat OK focus position. Based on my experience with this equipment configuration, you only need about 1 1/2 turn of the HF adjustment on the preamp card. Eventually you will need far less slit loss correction than with the exciter based system. But like Brad said, it may still be best if you leave the HF adjustment where it is now, because just by "earballing" it, you won't be able to adjust it that precisely. You can also download a software RTA like this here (free trial) http://www.soft32.com/download_79429.html . Yes, it won't be very true because it is unlikely that your sound card input is anywhere near flat, but it can help find you the relatively best focus position at least. The BACP readers can be focused to yield a very good HF response with little HF adjustment.  |  IP: Logged Sam D. Chavez Film God Posts: 2153 From: Martinez, CA USA Registered: Aug 2003 posted 02-24-2005 09:57 PM                       Azimuth is the most critical adjustment and can be "faked" by putting the cinema processor in a stereo format and setting the monitor to a surround only channel. Listen for a null as you twist the entire reader while running pink noise film.  |  IP: Logged Darren Briggs Master Film Handler Posts: 371 From: York, UK Registered: Dec 2001 posted 02-25-2005 02:14 AM                        If your using a scope you can set the azimuth correctly anyway using the x/y button. Also Focus adjustment can be seen in x/y to get the best clear line on the scope. Listening to the Pink Noise whilst doing the azimuth and focus i find helps. Final focus tweaks can be don on the RTA.  |  IP: Logged

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