naiefelyemeni 0 Posted October 7, 2015 ok, i installed 32 cameras on 2 16ch AHD dvrs using cat5 and using baluns on each ends , and using 2 16ch power supply boxes.. used 1 twisted pair for neg power and 1 pair for postitive and 1 pair for video pos and 1 pair for neg video.. turned on everything and only got like 5 cameras lol and they were all garbled picture.. so i took out all the power cables from the box and did one by one , now i got 10 cameras working but seems like theres horizontal lines and a little shaking.. if i touch some of the cables that are behind the dvr many cameras get worse or better? and 3 of those cameras are on a seperate 2amp power supply, because if i put one of them back to the box all the cameras go crazy?? and some cameras as soon as i touch the postitive, the camera turns on? without the negative? wierd issues.. i think theres a negative/ground issues? i checked all the cables from both ends and all are good? Also is it true it maybe im using a pair for each connection of power when 1 wire should be used? im confused and going crazy Share this post Link to post Share on other sites
Boogieman 1 Posted October 7, 2015 What model DVR's and cameras? Did you use quality cable? Copper not copper clad aluminium? What baluns did you use? Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 7, 2015 i used a combo of these 2 http://www.homedepot.com/p/Cerrowire-1000-ft-24-4-Gauge-Category-5e-Riser-Internet-Wire-Gray-2700-0104K5/202206479 says copper http://www.ebay.com/itm/CAT5E-1000FT-500FT-CAT5-CABLE-UTP-WIRE-SOLID-ETHERNET-GRAY-BULK-RJ45-LAN-BOX-/251397362960?var=&hash=item3a88735510 says copper aluminum clad and i used cheap baluns like these http://www.ebay.com/itm/10pcs-Coax-CAT5-Camera-CCTV-BNC-Video-Channel-Passive-Balun-Transceiver-Cable-/301294875513?hash=item462692f379 i hope i dont have to rerun those cables that would be hell Share this post Link to post Share on other sites
Boogieman 1 Posted October 7, 2015 i used a combo of these 2 http://www.homedepot.com/p/Cerrowire-1000-ft-24-4-Gauge-Category-5e-Riser-Internet-Wire-Gray-2700-0104K5/202206479 says copper http://www.ebay.com/itm/CAT5E-1000FT-500FT-CAT5-CABLE-UTP-WIRE-SOLID-ETHERNET-GRAY-BULK-RJ45-LAN-BOX-/251397362960?var=&hash=item3a88735510 says copper aluminum clad and i used cheap baluns like these http://www.ebay.com/itm/10pcs-Coax-CAT5-Camera-CCTV-BNC-Video-Channel-Passive-Balun-Transceiver-Cable-/301294875513?hash=item462692f379 i hope i dont have to rerun those cables that would be hell Big mistake to use CCA cable. I would pull it out. But you may be able to salvage it with better baluns...Ill leave it to the guys use these baluns to make a recommendation. There are special baluns made for AHD systems. Like these http://www.cctvcamerapros.com/AHD-HDTVI-HDCVI-CCTV-Video-Balun-p/vb-hd2.htm Dont know if those are any good though...hopefully someone can help you out. Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 7, 2015 i dont care about the cable its all the labor! it took over 20 hours to run those cables how about these baluns ? http://www.ebay.com/itm/321842064983?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT i already ordered these earlier today they say they work graet with ahd sytems? http://www.ebay.com/itm/151649624874?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 7, 2015 Also what about that weird problem when you just touch one cable to the box's terminal l i believe it was a positive and the camera turns on?? without connecting the negative??! or vice versa.. just one cable turns on the camera?? Share this post Link to post Share on other sites
Boogieman 1 Posted October 7, 2015 i dont care about the cable its all the labor! it took over 20 hours to run those cables how about these baluns ? http://www.ebay.com/itm/321842064983?_trksid=p2060353.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT i already ordered these earlier today they say they work graet with ahd sytems? http://www.ebay.com/itm/151649624874?_trksid=p2060353.m2749.l2649&ssPageName=STRK%3AMEBIDX%3AIT Dont buy anything off ebay....buy from a reputable dealer...buying on ebay is what got you into this mess in the first place. Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 7, 2015 yeah your right i gotta stop being cheap, its a bad habit that i need to stop Share this post Link to post Share on other sites
SunnyKim 2 Posted October 8, 2015 You may use "cat5" for AHD cameras, but RG59 cable recommended. Why baluns? I do not like to put Baluns at both ends. Why at the camera's end? Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 8, 2015 ok i have ground loop on some cameras, the exterior wall of the store has stucko and sheet metal, you think this will cause the ground loop? and why is it when i only touch one of the power ends to the power box the camera turns on?? Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 8, 2015 You may use "cat5" for AHD cameras, but RG59 cable recommended. Why baluns? I do not like to put Baluns at both ends. Why at the camera's end? so i dont need them at the cameras end? i thought i need them on both ends to balance the line? and how would i connect it tot the camera end anyways? since i used cat5? unless i can use this at teh camera end? http://www.ebay.com/itm/New-50-PCS-Coax-CAT5-To-Camera-CCTV-BNC-Video-Balun-Connector-For-CCTV-Camera-/331151630776?hash=item4d1a2ce1b8 Share this post Link to post Share on other sites
Horizon 0 Posted October 8, 2015 Hello naiefelyemeni. I suspect part of your problem is that you've used 1 pair for video pos and 1 pair for neg videoTo use twisted-pair for video, the video must travel through only one twisted-pair. So connect video pos to one wire, and neg to the other. The remaining twisted pair is unused (or you can use the wires for power as well). Use a balun at each end (camera and DVR).This might fix your video problems. You might be able to use copper-clad aluminium for short distances. At least it's not as horrible as copper-clad steel. Full copper is best for CCTV. The camera works without the negative power terminal connected because the camera designer has done a bit of a cheapy, and hasn't used an isolated power supply. The power supply negative is connected to the coax shield inside the camera. Basically you have a ground loop, which could mess up your images. Since you have a spare twisted-pair, you could try using this pair as an extra negative (ground) for the power supply. This might help stop some of the power supply current from travelling through the video twisted pair. So your cable would have: one pair for video one pair for power positive two pairs for power negative. Share this post Link to post Share on other sites
ak357 0 Posted October 8, 2015 So your cable would have: one pair for video one pair for power positive two pairs for power negative. I would split 3 pair evenly 3 wires for ( + ) 3 wires for ( - ) Share this post Link to post Share on other sites
tomcctv 190 Posted October 8, 2015 You may use "cat5" for AHD cameras, but RG59 cable recommended. Why baluns? I do not like to put Baluns at both ends. Why at the camera's end? You need baluns at both ends ..... If you don't understand baluns then start another post to talk about them Share this post Link to post Share on other sites
tomcctv 190 Posted October 8, 2015 Your first problem is how you have wired up your system Your biggest problem at the moment is how you have connected your baluns ..... Pair for video + and pair for - ..... This need to be changed before anything else .... You should ONLY use 1 pair IE blue for video + blue white - Rest of pairs look at ak post This needs doing to see if you do have problems Share this post Link to post Share on other sites
Securame 0 Posted October 8, 2015 You may use "cat5" for AHD cameras, but RG59 cable recommended. Why baluns? I do not like to put Baluns at both ends. Why at the camera's end? so i dont need them at the cameras end? i thought i need them on both ends to balance the line? and how would i connect it tot the camera end anyways? since i used cat5? unless i can use this at teh camera end? You DO need them at the cameras end. As they have already told you, use only one pair for video. Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 8, 2015 Hello naiefelyemeni.I suspect part of your problem is that you've used 1 pair for video pos and 1 pair for neg videoTo use twisted-pair for video, the video must travel through only one twisted-pair. So connect video pos to one wire, and neg to the other. The remaining twisted pair is unused (or you can use the wires for power as well). Use a balun at each end (camera and DVR).This might fix your video problems. You might be able to use copper-clad aluminium for short distances. At least it's not as horrible as copper-clad steel. Full copper is best for CCTV. The camera works without the negative power terminal connected because the camera designer has done a bit of a cheapy, and hasn't used an isolated power supply. The power supply negative is connected to the coax shield inside the camera. Basically you have a ground loop, which could mess up your images. Since you have a spare twisted-pair, you could try using this pair as an extra negative (ground) for the power supply. This might help stop some of the power supply current from travelling through the video twisted pair. So your cable would have: one pair for video one pair for power positive two pairs for power negative. Makes sense, your making me feel a whole lot better today, cant wait to go back and try that out! thanks! Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 8, 2015 Your first problem is how you have wired up your system Your biggest problem at the moment is how you have connected your baluns ..... Pair for video + and pair for - ..... This need to be changed before anything else .... You should ONLY use 1 pair IE blue for video + blue white - Rest of pairs look at ak post This needs doing to see if you do have problems will do, its my first install with cat5 , now i learned something.. thanks Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 8, 2015 thanks to all of you, i will do what you guys have said.. thanks! " title="Applause" /> Share this post Link to post Share on other sites
naiefelyemeni 0 Posted October 8, 2015 one more thing , is cat5e full copper good enough for future installs, or cat 6 or cat6a any better? Share this post Link to post Share on other sites
