tdenson

I don't think it's switchable, it's always there did you get yours both working together ? (if so how ?????) Yes, they are both working together, but can be a bit erratic at time. They are just wired together in parallel as per multi drop.

I don't think it's switchable, it's always there

hello This issue comes form RS485 star construction or long distance . Normally every dome can set the Termination Resistor to 120 Ohm by switcher . Can you find the camera address switcher ? take a photo to me . Regards Philip Vidocanada@gmail.com Have now had a response from Swann and apparently there is a terminating resistor at the camera

I am using a pair of video/Cat5 converter boxes (passive) over a run of about 60 metres of Cat6. The attached image shows the picture quality. I am getting a horizontal white bar that moves from bottom to top, also generally waviness of the image. Is this more likely to be some interference or my connections ? Also, as a subsidiary question, I have a telephone cable (3 twisted pairs) running over the same route carrying an RS485 signal for PTZ - can I use one of the pairs of this with Baluns in the same way as CAT5/6 ? https://dl.dropbox.com/u/2351913/Church/photo.PNG

Hi Sir, Can you please post the isolator picture and advice the model that you used. Thanks This is a link to the item - http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=140913410258 Tony

I didn't realise there was a pray smilie !

Thanks vector18, that did the trick nicely - see result

Just bought one off eBay, seems a handy thing to have anyway. I assume I only need one (just at one end) ?

I have an interesting problem running the wiring for a PTZ CCTV camera back to the (Swann) DVR. I have to run from point A to point C via point B. For various physical site issues I can only use wiring that is already in place. I have already sorted the composite video and power issues but need to sort the RS485 for the PTZ. A to B is about 20 metres and I have available a CAT5 and VGA cable. I would prefer not to use the CAT5 if I can avoid it (as I have other potential uses for it) although I believe it would be straightforward over CAT5 as it is twisted pair. My question is whether VGA uses twisted pair (I suspect it doesn't) and if not could I run RS485 for 20 metres over it. Regarding point B to C it is about 60 metres and I have available a CAT5 and a telephone wire. Again I would prefer to save the CAT5 if possible, but my understanding is that I would be fine with the (twisted pair) telephone cable. Is this correct ?