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4 ch stand alone, 4 cameras all run on cat5 single power suplly for each camera. One im still having problem with got 2 cat5, Utp for video, stp for power picture is still swimming

there are picture

I got 16 ch dvr all cameras run cat5e, 2 power suplly, 1 9ch 5amp for 6 cam, 2an 16ch 10amp for antoher 7 cam, al cameras got IR, in some in some used ground loop isolators. By dvr side on test monitor all works, whe conecteted to dvr im geting mess, i got 9 cameras working when i conect some more one goes down, another start to have bars on screen. Baluns are not mixed, what else can I check, what do You think about changing power to 16ch 25amp, what else im gonna change dvr, any ideas?? Thank You pc base made/sold by i-netdvr.com

Thnks to all of U guys problem solved i used single power suplly for each camera works but by dvr doesn't look like i planed , what stuff do U use to avoid ground loop issues? Is only solution rg59?? hope not. Tahk You again Did anybody use this products, any rewiews?? http://www.pimfg.com/Product/Video-Balun-Kits

one pair for video, power 1 as well http://www.amazon.com/gp/product/B001HBP9ZC/ref=oh_o00_s00_i00_details

cameras i added are avs brand total 4 3 indor xenas XENA4VIR, outside sensd212 12/24, (no problem with this one even when connect on 12v), the longest run doesnt up to 500feet no more

I got customer they wanna to cover parking lot in size about 180'x110', cameras will be mounted on 3 story building on one side of this lot. Of course problem is to balance there expectation, price and quality. First i was thinkig to install 4-5 and split whole parking lot between those cameras, my next idea was to install 2 megapixel cameras.??? but then price, anybody got idea?? There is gonna be another 4 cameras i was thinking to use: dvr: G4-RTAHD-D1 gennIV and analog cameras from AVsuriel. If Mpix cameras what shoud I Use, thank U