Finally found the problem regarding external sync. On the DNxIO there is a sync input with a loop thru. I figured I could feed sync into the top bnc and terminate the bottom bnc. I have an old 1750 scope in the sync line so I could see the cable was properly terminate. Today I looked close and the sync in label is on the bottom bnc so I swapped sync cable with the terminator feeding the sync line into the bottom bnc and voila it locks. I had just figure the sync in meant the two bncs were a sync loop through but I guess in today's world of active termination circuitry it matters where you plug in. Even though the top bnc properly terminated the sync signal it did not feed the signal to the genlock circuitry. Oh well live and learn.
Now I have to figure out the relative offset versus rear panel relative to setting on the scope. I've never had to time anything in the HDSDI world just make sure it was locked and within the input tolerance of the recording device. I assume you set the relative offset to house bars or black out of a switcher if I had one and then time all the cameras etc... to that. This is one of the downsides to no longer getting to work with a big switcher in the edit bay.
---In Avid-L2@yahoogroups.com, <bigfish@...> wrote :
When I'm running the Nitris DX in this bay I have not problem locking the scope and the Avid to external sync and seeing it lock without any drift on the 7020 scope. Now using the DNxIO I can't get the signal to lock when setting the scope to external sync.
When I go to the BM Video Desktop control panal/driver interface I don't see anything under the BNC Reference Icon. I'm assuming the dashed lines under the BNC Icon for Reference would display the presence and perhaps type of sync coming into the DNxIO like it does with the other icons for video output. The outputs display 1080P or 2160P under their icons depending on if I have the Avid Hardware setting to 1920x1080 or 3840x2160.
In the output section the far right "Composite Icon has just a dash over the word composite. In the section to the right labeled "Ref Input" there is a BNC icon with a light grey dash below it and another darker grey dash below that. I would think that would read out where the top dash is what type of sync it detects on the input. Also given the output displays as unlocked on the scope I think something is whacky. I am very confident the sync signal is properly patched to the DNxIO ref input. I feel this because when I pull the connector off I can see the trilevel sync jump to double level indicating the line is unterminated. Plugging the cable back in and the level goes back to normal as displayed on the scope.
Unfortunately this is my DNxIO from my home system so I can't go try this at home at this point. I can't recall if I've even used the external sync on my home system when running the DNxIO.
---In Avid-L2@yahoogroups.com, <bogdan_grigorescu@...> wrote :
From: "John Moore bigfish@... [Avid-L2]" <Avid-L2@yahoogroups.com>
To: Yahoogroups <avid-l2@yahoogroups.com>; Yahoogroups <editing-list@yahoogroups.com>
Sent: Monday, February 13, 2017 3:54 PM
Subject: [Avid-L2] DNxIO not locking to External Sync with Avid 8.5.3?
Posted by: bigfish@pacbell.net
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