10 frame delay out of the HDSDI - need immediate help.

[dino g]

Hi All, we have a Very well respected DIT in China right now that is having an issue with two dragons =. the signal is delayed out of the HDSDI by about 10 frames. it is also slightly delayed out to the onboard. he has changed and played with the monitor control tab in display and nothing is helping. anyone have any suggestions, please chime in here...

dino

 

[Blair S. Paulsen]

Sorry pal, that's a new one on me.

If you discover anything the rest of us should be aware of, please post.

Cheers - #19

 

[Jacek Zakowicz]

There has always been a 3-5 frame delay to the onboard.
I thought SDI was the same as the onboard uses HDMI so they are both converted from LVDS and that takes time....
The only difference is that SDI is serialized but it should not make a difference...

 

[Sidney L. Plaut]

i unfortunately also aleays had a noticable
delay on the sdi since an Early Epic software upgrade and also on dragon.

 

[Gunleik Groven]

Haven't gauged the SDI delay since early Epic-M days.
But it was there. Less to the internal monitors, and something I checked the other day, would suggest that HDMI could be faster (in between SDI and on-board), but THAT result could also be due to the monitors used (monitors can introduce extra latency).

10 sounds like something accumulative is happening.
Up to 6, sounds within expectancy. U need a few frames to trigger the feeling of being out of sync... 10 is a bit beyond that tolerance.

 

[TheBied]

The camera is incapable of generating a 10 frame delay based on internal buffering.

For lowest latency results, the monitor refresh rate should be set to 60 Hz.

 

[Gunleik Groven]

The camera is incapable of generating a 10 frame delay based on internal buffering.

For lowest latency results, the monitor refresh rate should be set to 60 Hz.

Internal monitor I guess?

Having 60HZ on the SDI for all sync'ed scenarios doesn't make a lot of sense.

 

[TheBied]

Internal monitor I guess?

Having 60HZ on the SDI for all sync'ed scenarios doesn't make a lot of sense.

Running the monitors synchronized with the senor rate will also provide minimal delay.

 

[Joel Voelker]

Also depends what monitors youre using and how they're configured. Flanders monitors have horrible delay due to internal signal processing. Much better at 60hz refresh

 

[Michael Lindsay]

Hi Dino

What monitor are you using to measure delay?... Many are slow (40-100ms) and some have setting that can improve latency..

 

[Michael Lindsay]

Also depends what monitors youre using and how they're configured. Flanders monitors have horrible delay due to internal signal processing. Much better at 60hz refresh

Flanders can be configured down to about 1 or so frame..

 

[Mark L. Pederson]

Running the monitors synchronized with the senor rate will also provide minimal delay.

aka GENLOCK.

 

[dino g]

i am not the one with the issue, it is a DIT in china. well an american DIT in china. I believe red reached out and perhaps they fixed the issue, i will try and followup and provide any insight, thanks for the suggestions.