the toss

Either educate the electricians or get ones that will do what you ask.

You say your picture at night is terrible - does this mean it is ok in the day? Check that you don't still have the protective film on the dome or lens.

Also try to mount the camera so the licence plate is in view for as long as possible. Traffic speed cameras have an angle of incidence of less than 37*

Same goes in Australia where they will contravine the "Listening Devices Act" @ Milkisbad - one way operation does not make for a good intercom.

On live view , playback or both ?

That will be it's "home" position on power up. Has this ever worked properly?

What is going to provide power to these two wireless ptz cameras?

Sounds like he dropped power off the cameras. I suppose that would get rid of the problem:)

It looks more like electrical interference to me than ground loops. You say nothing about what type of cable you are using. A common source of this type of interference is fluoro lights or noisy switch mode power supplies

Very very easy to interupt WiFi transmission.

IN THEORY you could multiplex the two signals , modulate an RF carrier & feed it down the single wire which would act as an antenna. You would then need to have an RF receiver/demodulator then demux it - IN THEORY. I've never seen it done.

You "de-activated the day/night mode" which is to give you a picture at night. So now the camera is set up to give a picture during the day under ideal lighting conditions. At night the auto iris and electronic shutter will be doing whatever they can to get enough light to produce a picture. This will involve the iris opening fully & the shutter speed slowing down resulting in a blurred picture (if any at all). Put the camera back to how it was meant to be. If you need colour at night then buy a low light colour camera and be prepared to pay. Any extra lighting that you can provide will help a lot.

That's because there is no sarcasm. All I'm saying is there is no point in dropping your mains voltage to 24Vac and then dropping it to 12Vdc when you can simply drop it directly to 12Vdc

You have too much money. Simply use ONE mains voltage to camera voltage regulated adapter.

There is no reason that I can think of that your cctv would interfere with a 310Mhz RF appliance.

Cat 6 is all you need (cat 3 would easily do the job) Don't waste your money

Ask her how many pairs of shoes she has. Black&White cameras will give the best performance in low light conditions (the better the camera the better the performance). If your cameras are NOT IR cameras then IR lighting will not help at all.

Before IP66 bullet cameras became readily available most outdoor installations were with box cameras housed in IP66 enclosures. A common version was a wedge shaped enclosure that fixed directly under an eve or awning. The cable entered through the top of the housing( the face that attached to the awning ) This was good in theory until your guttering overflowed into the eve, and the water dropped through the cable entry into the enclosure. I used to drill a small weep hole in the lowest point of the enclosure & had many many arguements because of it. The thing to remember is that something only retains its IP66 rating until you penetrate it for cable entry. Always put a weep hole in at the lowest point.

I'm guessing that what you are after is the same stuff they use for roller door reed switches. So a reed switch manufacturer might be worth trying

Ohh - it's one of THOSE. You'll know better next time.

Does it have a full set of function buttons on the DVR or is everything done via the remote and mouse?

google is your friend

That interference is not caused by an earth loop. It is a Moire interference pattern and can be caused by a thousand different things just some of which are - pixel size , image sensor quality , image sensor scan rate , colour subcarrier harmonic interference. They are often caused by repetitive vertical or horizontal items in the picture (like fence posts) that cause an interference pattern due to pixel size and scan rate. The easiest way to avoid them is using high quality sensors & keep outside interference to a minimum. I'm sure everyone is familiar with the "strobe effect". If you understand how the strobe effect works then you are well on your way to understanding the Moire effect.

The ones you get from UK will almost certainly be made in China so the country of origin becomes irrelevent. If they are for your own use then get them from China as they will be cheaper. Your only problem will be identifying a reputable supplier & the cost/effort in the case of warranty. If they are for commercial use then you have the problem of - minimum buying quantities/distribution/warranties/returns/freight for your imports and warranties /returns/freight for your sales. I have looked at this & dropped the idea.

For the most part the low end cameras just use IR as a marketing con job. They are useable if installed within their parameters. My rule is for any IR camera under $200 you can halve the stated IR range & work on that. At the high end of the market the IR cameras can be pretty good but they still need a lot of thought put into the installation for good results.