Hi. I'm hoping (against hope!) an expert out there will have a simple answer for this one for me. I've got a 4 camera sansco dvr system (this one https://www.amazon.co.uk/SANSCO-Recorder-Security-1920x1080-Vandal-Proof/dp/B00Q8ETGNO).
Three of the cameras are working fine, the fourth one has a double "ghost" image, see attached. It has worked fine previously I'm not sure what has happened.
Things I've tried -
swapping cameras - the camera itself works fine when connected in place of one of the other three, suggesting the cabling is at fault?
swapping the port used on the dvr - makes no difference which port the cable is connected to the image is always doubled when that cable is used.
adding a ground loop isolator (https://www.amazon.co.uk/Transceiver-Coaxial-Ground-Isolator-Female/dp/B07GVGBLBC/ref=sr_1_1?dchild=1&keywords=group+loop+isolator+bnc&qid=1614534889&sr=8-1)
it is a long run to this camera and i'm sure it shares some of its route with mains cabling so i thought this might help but it makes no difference.
turning it all on/off, jiggling all the connectors i've got access to!
i can't remember if the run to this camera from the dvr is actually 2 bnc cables joined, if it is i know longer have access to the join
Things i haven't tried yet
testing the voltage at the camera
anything else i can test with a multimeter (impedance??)
Any help greatly appreciated.
