Can a 12V video camera module be phantom powered over the signal line with a couple of bipolar caps in series at each end of the line? Will DC ripple cause a noticeable effect on the picture?
- posted
16 years ago
Phantom power video camera module
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- posted
16 years ago
Polarized are OK, but it takes several caps in parallel for decent video response. You also need a couple inductors to inject and remove the DC from the coax. Just remember to put the plus side of the caps to the coax, and the negatives to the camera and monitor. A low ESR 1500 uF capacitor, and at least 16 volt rating, plus a .1 uF in parallel should work ok. If the fine detail is missing, add a .001 uF in parallel to the other capacitors at both ends. The inductors should have a SRF well below 60 Hz.
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