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Author Topic: How common are NTP servers on theater networks? Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 08-27-2013 08:19 AM                     quote: Dave Macaulay cumulative, I believe - after 10 years you would have 60 mins available if you had never changed it). As Steve says - not cumulative - any single change larger then 6min will be discarded, and any cumulative per year exceeding a total of 6min. So for some servers being really off, around the end of the year a 12min correction is possible, if needed. Steve - where on a Dolby can you adjust the show clock time? - Carsten  |  IP: Logged Dave Macaulay Film God Posts: 2321 From: Toronto, Canada Registered: Apr 2001 posted 08-27-2013 09:22 AM                     The Dolby DSS/DSP100 (haven't tried a 200) time adjustment limit is cumulative: I just adjusted one running 5 years that showed a +/- 30 minute window, and Dolby tech support confirmed the adjustment window is cumulative. I don't believe Doremi is, but I have never tried: I just get the "increase limit" DLM if it's out more than 6 minutes. This allows 30 minutes per year, I don't know when the year starts/ends. DSS: In "system" "auditorium" there should be a check box for "allow secure time adjustment" or similar. Check it and the adjustment window pops up, with the pre/post adjustment limits shown. Set the time a minute ahead and click "apply" when your cell phone time rolls over to that minute: cell phone network time is about the most accurate you can get indoors. The Unix/Linux NTP client process is supposed to adjust the clock speed, but I don't know if all the secure clocks allow this. I have noticed that Doremi systems on NTP seem to correct the clock speed: all server clocks that have been on NTP for a year seem to be very close after a month or so with no NTP. (The Doremi TMS NTP server tends to shut itself off regularly). My experience is that most no-NTP sites will have one Doremi secure clock that's out about 10 seconds in a month (really poor RT clocks I suppose but that's been what I've seen)  |  IP: Logged Carsten Kurz Film God Posts: 4340 From: Cologne, NRW, Germany Registered: Aug 2009 posted 08-27-2013 08:03 PM                     Older Doremi software versions also had a 30min limit. But as the DSP100, they were not DCI compliant. - Carsten  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 08-28-2013 06:04 AM                     Carsten: For the Dolby show clock, you can set that in the BIOS...Note, that clock will be at UTC so only play with the minutes/seconds. It is best to set that without any NTP connection and allow it to boot all of the way up so it "takes" Note, the DSP100 has attained DCI compliance (as has the DSS100) however, Dolby has not issued the DCI compliant software for those units yet. I suspect we'll see it before 2014. I'm curious if the DSP100/DSS100 would sill allow a cumulative time set running Dolby System 4.5.x or later.  |  IP: Logged Sebastian Pienz Film Handler Posts: 2 From: Kempten, Bavaria/Germany Registered: Aug 2013 posted 10-17-2013 01:48 AM                        Is there any way to get access to the dolby server that allow start and stop services like ntp ? And access the ntpd.conf ? Because we want get ntp running with the dolby server the ntp server will work correct with all other devices in the network and 3 hopps coudn't be too much. Thanks for your answers  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 10-17-2013 04:29 AM                     You'll need root credentials (don't even ask!) but ntp.conf is then reset every time you reboot the system - unless you tweak the read only partition. Short answer: no. I believe Dolby is implementing the NTP too strictly, and NTP cannot work properly with only one server. Either they allow us to set more than one server, or they run ntpdate as a cron job every now and then.  |  IP: Logged Sebastian Pienz Film Handler Posts: 2 From: Kempten, Bavaria/Germany Registered: Aug 2013 posted 10-18-2013 02:27 AM                        Thanks for your answer do you now is it possible to get root password legal from dolby or kinoton ?  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 10-18-2013 04:06 PM                     You didn't read my post then!  |  IP: Logged

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