Dennis Kersten Posted June 12, 2014 Report Share Posted June 12, 2014 Hi All, When syncing the audio the picture there is a sync drift of 1 frame each hour. So at the end of an 8 hour day the audio is 8 frames off sync. I put the lock it on the F3 and connect the timecode + genlock. Yesterday I brought my R4 + lock it to my dealer and they experienced an sync drift off 1/2 frames each hour. They corrected it but today I got the same problem... The problem seems the same with different F3 camera's. We sync in QT/bwf merge. Anyone experienced something like this? Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
John Blankenship Posted June 12, 2014 Report Share Posted June 12, 2014 You didn't mention important particulars such as if the camera shows if it recognizes the incoming code and what frame rate and settings you're using. Quote Link to comment Share on other sites More sharing options...
Philip Perkins Posted June 12, 2014 Report Share Posted June 12, 2014 1/2 a frame per hr between your lockit and your recorder isn't great, maybe have the Lockit adusted to match the recorder? The more or less standard is less than a frame over 8 hours…. philp Quote Link to comment Share on other sites More sharing options...
davidm Posted June 13, 2014 Report Share Posted June 13, 2014 I'm guessing that your dealer corrected the sync drift between the Lockit and the R4 by retuning the Lockit to the R4's speed with a Master Controller. If so, you could take the Master Controller to your shoot and compare the TC over the course of the day from both the R4 and Lockit to determine if one of them is drifting over a long period. The other thing to check is if the camera is picking up the trilevel sync. Look in the viewfinder while connecting and disconnecting the trilevel sync cable. You should see a glitch in the video as the camera switches sync source from internal to external and vice versa. Quote Link to comment Share on other sites More sharing options...
Dennis Kersten Posted June 13, 2014 Author Report Share Posted June 13, 2014 Thanks! Fps is 25 and camera recognizes TC and keeps "sync" on eye during the day Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dennis Kersten Posted June 13, 2014 Author Report Share Posted June 13, 2014 Gonna check the trilevel today. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dennis Kersten Posted June 13, 2014 Author Report Share Posted June 13, 2014 Philip the lockit is adjusted to the recorder. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dennis Kersten Posted June 13, 2014 Author Report Share Posted June 13, 2014 David just checked; We don't see a glitch when connecting the genlock and vice versa. Both bnc cables are fine. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
studiomprd Posted June 13, 2014 Report Share Posted June 13, 2014 (edited) DK: " Anyone experienced something like this? " sorry, not me, at least not exactly like that... I have had issues with TC drifting... Edited June 13, 2014 by studiomprd Quote Link to comment Share on other sites More sharing options...
davidm Posted June 14, 2014 Report Share Posted June 14, 2014 David just checked; We don't see a glitch when connecting the genlock and vice versa. Both bnc cables are fine. Sent from my iPhone using Tapatalk Generally you should see the effect of the camera switching to the external sync. If you don't see the glitch then it can be an indication that camera isn't switching to the genlock signal but it's not absolute. I think the Sony does have an external lock indicator but I can't recall if this is timecode or genlock or both. Another check is to test your BNC-BNC cables with a video monitor rather than a multimeter. Use the BNC video out of the camera to feed a video monitor with the BNC-BNC cables. Multimeters show DC resistance, whereas the Genlock signal is at several MHz. If you can see the video with the BNC-BNC cables then they are truly fine. I test mine with a Lockit and an oscilloscope to check there's a clean & correct level signal. The Ambient Master Controller is probably your best bet at figuring out which device is drifting by comparing both the TC out of the camera and the TC out of the recorder over a period of time. DM Quote Link to comment Share on other sites More sharing options...
Dennis Kersten Posted June 16, 2014 Author Report Share Posted June 16, 2014 Just brought the recorder, lockit and source video/audio from the shoot to the dealer. More news on wednesday. Sent from my iPhone using Tapatalk Quote Link to comment Share on other sites More sharing options...
Dennis Kersten Posted June 18, 2014 Author Report Share Posted June 18, 2014 Seems like 48 kHz on my R4 isn't exactly 48 kHz so tc slightly drifts during the day (this is the prediction now)… pfffffffff Quote Link to comment Share on other sites More sharing options...
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