what sort of baluns is he using.
I think i have said this in teh past, but if you use the NVT brand ones the problems you will get are very minimal.
This is a problem experienced by an associate that he asked me to explain., what are your thoughts.
He has lately moved away from coax for CCTV & is only running cat 5 & baluns & uses switch mode power supplies. He says he is often getting some sort of interference ( no description ) which dissappears when he runs the power over fig 8 instead of over the cat 5. If he uses a xformer type power supply over the cat 5 the interferrence also dissappears. I am not a fan of switch mode power supplies & I suggeted that it is this in combination of the balun in close proimity of the power supply that is the cause of the problem. It is only an educated guess & without a bit of lab gear is the best I could offer. What do you think ?
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what sort of baluns is he using.
I think i have said this in teh past, but if you use the NVT brand ones the problems you will get are very minimal.
Why use baluns and not coax?
So the powersupply is at the DVR end with the twin running to the camera?
If thats the case, switchmodes usually have a reference to earth, so there is probably an earth-loop with the camera being earthed in it's location, plus the reference to earth at the PSU end. Transformer type outputs are isolated from earth, kinda defeats the use of a balun, problem would likely not exist if the PSU were at the camera end.
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