2009Video Assist and Video Accessories forum
Video signal blackout when connecting RED camera SDI output through multiple devices in signal chain
17 years old. Gear and prices may have changed since.
DisputedParticipants disagreed and reached no conclusion. Read the findings as positions, not as an answer.
What the thread found
- When routing an SDI signal from a RED camera through an AJA converter and then to a monitor via a Modulus device, the monitor may lose signal despite the camera outputting video
- Weak SDI signal strength traveling through a long cable run can be disrupted by electromagnetic interference from powered devices like the Modulus unit
- RED cameras support multiple simultaneous SDI outputs
- Powering external hardware like the Modulus from a separate battery rather than the camera battery can affect signal integrity
Depends on
- The issue occurred with a specific RED camera build version
- Setup involved a Steadicam rig with particular hardware configuration
- The root cause was not definitively confirmed in the discussion
- The successful previous attempts at this configuration suggest the problem may be build-specific or setup-specific rather than a fundamental design issue
Gear in this thread
Same gear or parts
- 2022Power connector pinout for Master Greenscreen CRT monitor with 6-pin Hirose connectorMonitors
- 2017Wireless teleprompter setups for steadicam operationGeneral Discussion
- 2016Performance and reliability characteristics of Tiltamax wireless video transmitters compared to competing brandsDisputedVideo Assist and Video Accessories
- 2014DC voltage converter box with adjustable output range and protection featuresDisputedGeneral Discussion