nifter53

buy a Pelco Cm6800 matrix loop out to the DVR's for recording output coax to the 3 monitors buy 3x kdb300a keyboards. you can then program the cm6800 to grant rights over which cameras to which monitors/keyboards. BTW: Stay away from netvision. William seems pretty eager around here, but the stuff is Mickey Mouse.

I have a client looking for a 24 to 32 channel hybrid dvr. How are the Dahua systems at this level? I've used exacq, but a 32channel hybrid exacq would be over their budget. They only view the dvr when there is an incident from a remote client pc. No realtime monitoring. Nothing too fancy, just something very reliable that they can add IP cameras to. (i.e. onvif would be good) Any input is appreciated. Good/bad experiences with Hybrids at this level. Thanks!

Very interesting. I'm not experienced enough to comment on the voltage difference issue, but it could be a cause. On another note, what kind of monitor are you using? VGA or bnc? Can you try a different monitor? With all cameras connected and in a state of displaying horizontal lines on the dvr. Can you then hook a monitor to each one individually and see the image? (bypassing the dvr)

If the wiring is to changing then the ground loop is present at all times. Most likely at night the ir LEDs are powering on and drawing more power thus generating more current in the loop. Also at night the b/w accentuates the horizontal lines on screen because the contrast is higher. At this point I would say trying out a ground lifter on the dvr is your best direction. The principles of ground loop causes are quite simple, Too many grounds. However, an easy solution is often difficult to implement.

You have a classic ground loop. The reason the wall warts (110 ac adapters) work is that they eliminate the common ground. A ground loop is just as its name implies. Current is looping through your equipment via a common ground. To elimate the problem you either. 1) change cameras to dual voltage 12vdc/24vac cameras which by design elimate ground loops. 2) determine which pieces of equipment share a common ground and remove the ground from one of them. If you google "ground lifter" you will see an example. Looks like a an ad plug with no ground peg. It seems the logical answer is that your dvr and altronix are sharing ground and looping through the power ground and coax. Think of it as an actual loop. Current is passing through the camera, back trough the power supply, into the ground, back into the dvr, out the dvr via the coax and back into the camera. Or maybe the opposite direction, but you get the idea. When you switch to the power adapters, you removed the ground path shared by the dvr.

1) Is the cat5 shield touching (grounded) to any of the equipment? Try ensuring it is not touching/grounded on both ends. Try grounding just one end (via Drain wire) to dissipate the RF to ground. 2) Are you using just 1 pair of wires for the balun? i.e. use just blue + white/blue. Do not double-up (use multiple pairs) 3) You could try using a ground lifter on the DVR to see what effect it has on the noise.

Try this to start. Power up just one camera at a time and see if the lines are present on all, some or in some combination. If you isolate it to one camera, power that camera from a separate power supply. Also, are any of the cameras mounted onto/touching metal that could be linked to ground? What kind of baluns are you using? Have you tried swapping those? I've noticed poor quality with cheap or mix and match baluns.

Right now I'm deciding between 1) http://www.camera2000.com/en/cctv-tester-optical-power-meter-multimeter-video-signal-intensity-test.html 2) ideal Securitest 3) http://www.amazon.com/Defender-Security-82-12460-Monitor-Generator/dp/B008I5QHJ2/ref=sr_1_15?s=electronics&ie=UTF8&qid=1356478042&sr=1-15&keywords=5-inch+CCTV+test 1) has a fiber optic tester and a voltmeter 2) ideal is a good name brand 3) has a large 5.6" LCD and also does pattern test I think I would go for option (1) if I knew for certain a 3.5" screen is large enough. Thoughts? Merry xmas

Just realized I may want more in a tester than I realized. The specific client I am doing testing for has many fiber optic multiplexers in place and I have seen a few testers than include an optical power meter. Does anyone have any experience testing the optical signal in/out of a fiber multiplexer? Most of these testers have a 3.5" LCD screen. Is that large enough? Thanks again

I've used the 2.5 wrist LCD's and found them too small to properly focus a camera. I've used a 15" 110vac monitor and found it difficult to work off a ladder and find power. I'd like to know from anyone that has had a good experience with any particular LCD test monitor. Budget is not a concern, don't need PTz control, but would like pattern generation. Battery is a must, and would like water resistant. Thanks for any input!

Does anyone know if the 9700-MGR software can be downloaded from the pelco site? or can someone send to me by email? I've purchased a CM9700-CC1, CM9760-MXB, 6800E 48x8, KBD300a and 9760kbd (all off ebay) and will be attempting to configure the 6800e as a satellite device via tie lines. This is all for a lab environment so I can prepare for a clients production environment. Thanks

http://buildingskb.schneider-electric.com/pelco/print.php?AID=10386 So it appears it requires 15vdc/2a. So...can anyone confirm that pelco uses the standard of pins 1/2 and7/8 to carry data and pins 3/4 to carry power? Lastly, I currently have a universal laptop power adapter that lists an output voltage range of 15v-20v dc. Am I safe to use such a power supply? Thanks

Bought a 9760kbd off eBay, but it doesn't have the Kbd-ps-1 power supply. I was hoping to make my own power injector. Can anyone tell me what the voltage input should be for the 9760kbd OR the output voltage on the kbd-ps-1 ? I believe power is carried on pins 3/4 Thanks!

Looking for a portable CCTV LCD tester that supports coaxitron. Can anyone recommend one? Thanks!

Thanks for the replies! I did look at the cm2 camera master which does measure ire, but since I deal only a little in analog i didn't want to invest in an $800 composite video tester. I guess I am specifically looking to know if Testing for 1 volt peak to peak and/or impedance mismatches(i.e. using the lvpro) is going to lead me to uncovering a solution. Or if I would be better to invest in some other tool better suited to find problems I would otherwise not easily find. Ideal makes a CCTV tester that has a LCD screen and measure ire as well, but once again it's about $800. This is the only client in my area with this many cameras, and all the setups I do are megapixel. So any specific CCTV tester is going to be shelfed after this project. Thanks again for the input