my profile | my password | search | faq & rules | forum home

» Film-Tech Forum ARCHIVE   » Operations   » Film Handlers' Forum   » DTS & SRD into a CP65 (Page 1)

This topic comprises 2 pages: 1  2

Author Topic: DTS & SRD into a CP65 Greg Mueller Phenomenal Film Handler Posts: 1687 From: Port Gamble, WA Registered: Jun 99 posted 05-18-2003 02:21 PM                        Maybe this has been covered before, if so a referral would be appreciated. I want to hook both SRD and DTS to my CP65. Is there a way to hook both up at the same time through a switch etc. so which ever is being used will kick the CP65 into digital without having to physically unplug plugs and wires etc? I'm also using a Smart Afterburner TIA  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 05-18-2003 02:26 PM                     It's been a few years since I hooked up that combination on a screen, but I do remember it can be done. However one of those screens would auto-switch between the two formats and the other screen (wired identically) had to have the format you were not using turned off. I never did get it resolved because the projectionists did not believe it was any major issue and soon thereafter it was decided not to "double stack" auditoriums and spread the digital players around to analog screens.  |  IP: Logged Greg Mueller Phenomenal Film Handler Posts: 1687 From: Port Gamble, WA Registered: Jun 99 posted 05-18-2003 02:35 PM                        I wouldn't mind turning off the unused format. I'd just not turn it on in the first place, I guess. One guy I asked suggested getting one of those DB25 switch boxes and switching back and forth between the two. But he never figured out a switch for the "kick into digital" trigger  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 05-18-2003 03:37 PM                     Pin #25 on the DB25 connector is your "pulse to digital". I forget which pin is "pulse to SR", but it is in the DA20 manual as well as the dts6-d manual. You could get a DPDT switch for that or use two DB25 switchboxes. The easier solution would be to use the dts CP65 automation breakout board, as it has connectors for both units. At that point you would only need to swap the DB25 audio connector or you could use a DB25 to fanning strip cable for the DA20 and the dts CP65 audio breakout board for the dts (both connected to the digital input). Just make sure you have one powered down at all times. Then again, it seems I routed the dts signal through the DA20, because I remember I did not have to change any wiring to switch between formats. I'm sure there are other ways to do this. If no one else has a better recollection of the CP65 wiring, I'll take a look next time I'm near one.  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-18-2003 03:43 PM                     Which DTS do you have if it is the DTS 6 then connect the da20 output to the input of the DTS flowthrough relays and the otuput to the cp input and conect the logic (digital/SR through a toggle switch to the automation input If it is the DTS 6d one would need the cp200 relay board for the dts6d  |  IP: Logged Greg Mueller Phenomenal Film Handler Posts: 1687 From: Port Gamble, WA Registered: Jun 99 posted 05-18-2003 03:46 PM                        I've got the 2 drawer dts unit  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-18-2003 10:30 PM                     Greg, anything is possible. Pin 25 BTW is the projector #2 changeover logic pin on the CP-65 and DA-20 (and Panastereo, for that matter). You can certainly share the one digital input on the CP-65. There are versions of the control breakout boards from DTS that will block the DA-20 from seeing the DTS select Digital. The CP-200 audio breakout board will be essential to switch the audio between the DTS and DA-20. I think if you do a search on the various topics...I gave a description on how to do this. Steve I believe this link will get you to my previous description with a CP-65 (page 1) Click Here [ 05-19-2003, 06:25 PM: Message edited by: Steve Guttag ]  |  IP: Logged Ken McFall Jedi Master Film Handler Posts: 615 From: Haringey, London. Registered: Apr 2001 posted 05-19-2003 12:56 PM                     Greg I did this recently on a CP55, which is basically the same as a CP65. I was using the DTS6, three drawer unit. I wanted to make DTS the primary digital format. Thanks to some ideas from the guys on here and my own thoughts I was able to make it work exactly as I wanted with full reversion down from DTS to SRD to SR and back. Its been working faultlessly for some months now so its proven and reliable. YOu need an interface card with six relays on it and have to do quite a bit of soldering to make the leads but as its not an off the shefl option its the only way. If you need any further info drop me a mail and I'll try and help out.  |  IP: Logged Mike Rendall Film Handler Posts: 78 From: Southampton, Hampshire, UK Registered: Nov 2002 posted 05-19-2003 03:40 PM                     Done it already in our theatre. It is really easy - Speak to Karen and get a dts breakout board and another cable (can't remember the serial number but it is in the back of the dts manual). Wire it up and hey presto! I can even give you a circuit that you can build up which runs a set of LED's to show you which format is active at anyone time (you can effectively switch between dts & SRD on the fly.) Our theatres website is Union Films. There may be some tech stuff on the website UF Refurbishment I am getting around to putting in a formal picture submission to Brad, just got to get down there when it is quiet! Mike  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 05-19-2003 05:31 PM                     Mike, that circuit sounds like it could be useful to many people. If you would pass it along to my email as well as Greg, I will add it to the tips or manuals section.  |  IP: Logged Greg Mueller Phenomenal Film Handler Posts: 1687 From: Port Gamble, WA Registered: Jun 99 posted 05-26-2003 10:28 AM                        Looking around in the back of the DTS manual I found a diagram that shows that you need to plug in the "JM-11 Ribbon Cable" (from the DTS unit) into a "D462-01 Adapter Cable" and that into the "Audio To CP" (J8) plug on the back of the DA20. Then a DB25 male/female cable from the "CP Sense Control" (J6) to the "D496 Logic Card" which is plugged into the "J18 Connector" on the back of the CP65. It also says (as suspected) "The power on the SRD must be off when playing DTS". I suspect they mean the DA20. So all I need is the D462-01 Adapter Cable and a DB25 M/F cable about 3' long. Maybe an Either/Or switch sending AC power to either the DA20 or the DTS unit would be a good safe guard.  |  IP: Logged Mike Rendall Film Handler Posts: 78 From: Southampton, Hampshire, UK Registered: Nov 2002 posted 05-27-2003 03:15 AM                     Hi Greg, I have had a look in the back of the dts manual. The board you need is on page 65, It is called a dubbing interface (D725). The way it works is as follows : 1) If everything is wired correctly, the sound that will appear at the digital input on the CP65 is the feed from the Aux input (or dubbing input) This will be where you hook up the cable from the DA20. So, in this configuration the system will behave exactly as a normal SRD (65/DA20 combo) 2) If a dts movie is playing, *and* the dts6d is powered up and running *and* the timecode is read correctly then the relays will switchover to the second socket and now the sound from the dts system will be fed to the CP65. This happens because when the dts is active, pin 10 of the automation connecter is grounded which completes the relay circuit and throws the system over to dts. 3) If the dts fails (rarely) it should drop straight into SRD maintaining a digital through feed, if this fails it should then drop into SR. For this to work properly you need to put a solid state relay into the automation connector which would prevent the dts system from knocking it straight into SR when it fails but rather using the DA-20 automation to do this. I will sort out the circuit diagram to do this, it is quite straight forward and has worked well for the last 6 years in our theatre (so I am a little rusty on the specifics). I have had a delve but cannot locate my original diagram so I am going to have to work it out again from scratch. If you are going to solder the pads for the power feed to the automation connector then remember to remove it (and test it on a multimeter before connecting it to the D725 just in case you catch the wrong wire!) It would have been much handier if dts had installed a switchover system inside their unit. Hope this helps. Mike  |  IP: Logged Greg Mueller Phenomenal Film Handler Posts: 1687 From: Port Gamble, WA Registered: Jun 99 posted 05-27-2003 09:41 AM                        I have only a DTS-6. My manual doesn't seem to have that board listed.  |  IP: Logged Mike Rendall Film Handler Posts: 78 From: Southampton, Hampshire, UK Registered: Nov 2002 posted 06-11-2003 05:14 PM                     Hi Greg, It looks like my original reply got lost in the server downtime. The manual I was refering to is for the DTS 6D. I think the pinouts are the same (should be for the audio) and hence should work with a dts-6. I promise that I will send the diagrams etc into Brad, but I have lost my originals and will have to retrace my steps through the circuit board and redraw it. - May take me some time. Mike P.s. Nice pictures of your observatory on your website.  |  IP: Logged Mike Carro Film Handler Posts: 67 From: Tempe, Az USA Registered: Nov 1999 posted 06-11-2003 07:38 PM                        Greg, We have the same situation. I have my 2 drawer unit and my SRD hooked up to the CP 65. I've never been able to interchange between the two with out shutting one off.  |  IP: Logged

All times are Central (GMT -6:00)

This topic comprises 2 pages: 1  2

Printer-friendly view of this topic

Hop To: Select a Forum: Category: Operations -------------------- Digital Cinema Forum Film Handlers' Forum Large Format Forum Ground Level Feature Info, Trailer Attachments & REAL Credit Offsets Category: Community -------------------- Film-Yak Film Handlers' Movie Reviews The Afterlife Bob Maar's Joke-A-Thon Category: Classified -------------------- Equipment and Supplies Wanted/For Sale Help Wanted/Seeking Employment Category: System -------------------- Software Beta Testing Forum

The Film-Tech Forums are designed for various members related to the cinema industry to express their opinions, viewpoints and testimonials on various products, services and events based upon speculation, personal knowledge and factual information through use, therefore all views represented here allow no liability upon the publishers of this web site and the owners of said views assume no liability for any ill will resulting from these postings. The posts made here are for educational as well as entertainment purposes and as such anyone viewing this portion of the website must accept these views as statements of the author of that opinion and agrees to release the authors from any and all liability.