2004Video Assist and Video Accessories forum
Video output brightness issue with Modulus 3000 transmitter caused by missing signal termination
22 years old. Gear and prices may have changed since.
What the thread found
- A video transmitter that produces an overly bright output when connected directly to a camera likely has a signal termination problem, where the output is not properly terminated with a 75 ohm load.
- When a monitor is connected via a T-piece to the same transmitter output, the picture appears normal because the monitor provides the necessary 75 ohm termination.
- A temporary solution is to use a 75 ohm resistor (terminator) connected between signal and ground on the video output line.
- Some video transmitters have a selectable termination switch that should be enabled when no external monitor is connected to terminate the signal.
- If a transmitter lacks a termination control switch but requires termination to function properly, the device may be defective.
Depends on
- The user later noted this behavior may be normal for the device, suggesting the issue might not be a defect.
- The specific termination capabilities of the Modulus 3000 transmitter are unclear from the discussion.
- No resolution was confirmed, only that the problem was being worked around with an external terminator.
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