I got my hands on an old Sony FCB-EX1000P color block camera. It has composite and S-video output and supports VISCA for communication. I've been able to build a rough Arduino program to send and receive commands from the camera.
I have been able to take video from the camera but it is very, very dim. The OSD I control with the Arduino outputs from the same circuit and has normal colors. No matter how much I turn up the gain/aperture/shutter time it simply will not pass a dim gray color.
I have tried the internal ADC of a TV, an external AV2HDMI converter and a real analog TV, but I cannot get a bright picture from the camera.
When the camera is booting up it displays a bright vibrant blue color for a few seconds which on the oscilloscope looks like this:
After the bootup sequence,the peak to peak voltage is lower and even the most overexposed white light is dim gray.
This is with a full open aperture, maximum gain and 1s shutter time.
Why is this happening? Is the camera damaged or am I missing something? Do I need a signal amplifier?