cable question

[keemble 0]

i read that rg59 can run a maximum of 750ft and rg6u at 1,000ft.how about for rg179u?and i case i use rg6u but need to run the cable more than a 1,000ft,do u just join them or is there a special equipment to be use to amplify the signal?

 

i think i posted on the wrong thread.sorry

[Lolo Wolf 0]

rg179u is for VGA or HDTV broadcast better to stick with either RG59 or 6 copper for your cctv work.... High quality RG6 copper with a pro amp get approx 4500 ft ... Ive found RG6 without a amp 1000 ft is pushing it to get a acceptable result dependent on the run/path with ideal circumstances, try to avoid joining cables to lengthen run (splices etc) on a new install unless you are doing a emergency repair, better to pull a complete line. Perhaps you may want to research using UTP with Baluns (active/passive)

[keemble 0]

rg179u is for VGA or HDTV broadcast better to stick with either RG59 or 6 copper for your cctv work.... High quality RG6 copper with a pro amp get approx 4500 ft ... Ive found RG6 without a amp 1000 ft is pushing it to get a acceptable result dependent on the run/path with ideal circumstances, try to avoid joining cables to lengthen run (splices etc) on a new install unless you are doing a emergency repair, better to pull a complete line. Perhaps you may want to research using UTP with Baluns (active/passive)

 

pro amp?proactive amplifier?where do i place it on the cable run?halfway?im thinking of using rg179 for connections from vda to matrix,dvr,quad,monitor ect. but not from camera to vda.all equipments are placed side by side so it wont be that long.i have idea about utp but what are baluns?

[Lolo Wolf 0]

What is the total length of your run, distance to camera (s) in question? The UTP balun will enable you to use Cat5-6 in place of cable, there are many brands one such is Nitek http://www.nitek.net/apps.htm and by PRO I meant a high quality amp (in line) that amplifies as well equalizes the video signal.....sub-standard so called "cctv amps" often can be problematic and introduce more noise defeating the purpose. Equaliization of the video signal spectrum and not just amplification is the proper method. In order to correctly install cable compensation by means of a device you need to measure your total cabling distance. Then you can plot where to install the device. Either at the camera end or the monitor.... a potentiometer on higher end amps will have calibrated positions for meeting various cable lengths. There are methods/charts for setting the amount of amp/eq in relation to cable length but that is for another post/day..... regards

[keemble 0]

sorry for the bunch of question man.i really appreciate your time in answering it.i'm just a begginer on a cctv system but have knowledge on the basic equipments.i just want to know other special equipments that are used.about the cable run for e.g. a 2,000ft rg6 cable from matrix to camera.both ends use female bnc(i don't know if thats what its called).how to do that if i'm going to use utp and balun?were using kalatel digiplex iv system.all are in rg6 cable connections.camera to vda,vda has 4 output.1 to the matrix,1 to dvr, others for quad/mux etc.also one problem with the cameras on an elevator.if the elevator is idle/not in use,the signal is clear but when it starts moving,i get a noise signal.

[Lolo Wolf 0]

First off I dont know where you are located but be careful with installing cams in elevators, there are many requirements to follow as well there can be other systems integrated with alarm panels for elevator recall tied to smoke/fire alarms etc.. you dont want to disturb other wire paths.. Most cam wire/cable is located in traveler cable, how is your camera installed? what type of connection are you using,is it flexible coax... where is your power source for the cam,is it off a power outlet in the cab ceiling on top of the cab... if you are getting noise when the elevator is is running I would suspect that you are getting induced power interference or perhaps ground issue....For your 2000 ft camera distance is it outdoor or inbuilding.. I would source out a active UTP balun: Nitek, NVT are popular there are many others...look at their websites and check out active (powered) solutions they also have instructions for aplication. What kind of cable is your RG6...hope its copper.

[keemble 0]

the cam is placed in one corner of the elevator ceiling.the coax used is different because the centre core is not a single solid one.its a bundle of little thin wires.is that a flexible coax?the power is connected to the power outlet on top of the cab.i think your right that its getting interference whenever the elevator moves,i'll try to check that.the 2,000ft cam distance is inbuilding.i have browsed the site you gave and understand the use of utp balun.just one thing,whats the difference between active and passive balun?which is better,to use a utp or a coax for cable run or depends?if the run wont go more than a thousand ft,better to use coax,otherwise use utp instead?rg59 max length is 750ft while rg6 is 1000ft for video signal only or any is applicable.does it differ in length if i use a monochrome cam or a colored cam.were using hosiwell,psi highspeed or belden coax.depends on the supplier stock and also the purchasing dept as what will they give.i think its copper.what brand is good that you recommend?

[Lolo Wolf 0]

Belden wire - (New Generation 533945 RG6 CCTV Coax CCTV Cable 18ga Solid Bare Copper Center Conductor - Foam polyolefin insulation 95% Bare Copper Braid Shield - PVC Jacket) you should be able to max out 1000ft any longer I think you will have to use a amplifier. The active UTP balun is powered - the passive is not, active will enable further distance. Your choice to use cable or UTP really depends on the install. For inbuilding, with a active balun you will need to power it. With the RG6 you can run direct to your monitor/DVR unless you find that the signal is dropping off then you will have to amp it. Your 2000ft length to camera is it on the same floor, did you layout a path, you should take into consideration all the cabling factors such as bends, etc before you decide on the method. The cable for the elevator as you described sounds correct: a stranded cable will be flexible to allow for movement, often the video output will travel along the exisiting "traveler" cables in the shaft to a junction terminal box sometimes located approx halfway up the shaft from there it often will be connected to standard solid cable then on to your monitor or security room. Some elevator cam installs use fiber or UTP Ive seen all three in new and old construction. It is difficult to troubleshoot your "noise" problem with the elevator cam without detailed description or onsite evaluation of your system, however start with your pwr supply, check all your cable paths, check voltages, check the actual connectors, if the cam is run to terminal box as I described then locate it and check the connection there too. I am heading out of town to my cancer center so wont be able to post any further for awhile.... perhaps other forum members can help you with other questions, there is a member here named survtech who has done extensive testing using baluns and has a lot of knowledge on their uses from his casino work, check the forum for his data and insights. Good Luck regards

[keemble 0]

ok man.thanks for all the help.really appreciate it.learned alot from the infos you gave me.see you later.

[Lolo Wolf 0]

keemble one last thought, I try to give advice that is well grounded....was talkin to a buddy of mine (union mechanic) that does elevator work back east and I asked him about the noise issue you are getting, he told me that more than likely it is a ground loop - with car in motion and changing position the GROUND potential will vary, it seems to be a common problem with elevator installs, as well make sure none of the cabling got skinned and any exposed shield are contacting metal. Good luck....see ya Regards

[survtech 0]

RG-179 is really only usable to approximately 100 ft.

[cctv_down_under 0]

Some cams have inbuilt camera amplification, I know the XF lets you set cable compensation allowing for much longer runs, and is a lot less messy than using an actual amp, it sends a signal up the coax to measure the impedance and then automatically balances it back to 75