smartec

Hi, i am wondering whether you guys has similar problem that i am encountering. My hi sharp dvr shows that channel 1 is video loss, but when i tried to swap the camera from channel 1 to channel 2, it shows the image in channel 2, but not in channel 1. and if i plugged the other camera to channel 1, it will still shows video loss. Anyone has experienced this before and might know the problem and solution for that? I have several dvrs with this issue. I also encountered this with i catch dvr before. Regards, howard

Do you mean the bnc input in dvr? i hv checked the bnc input in dvr, all of them are normal. But only specific channel doesnt show the camera images. Bnc output in camera is perfectly fine too since i hv tried to put it in diff channel and it shows cameras image. Hv you encountered this problem before?

any better solution to install those 50 ip cams?

try to get bullet type of cameras since they have more IR on it. Dome cameras are not good for the outdoor situation as I have the same experience like that before.

@soundy: i am using video amplifier which can reach 1 km distance, just for information, one of the camera that has distances of 2500 feet shows on the DVR. The weird thing is even the 150 feet camera doesnt show anything on the DVR. @rory: "Could be that the DVR is set for 75-ohm termination on the lines, which is loading them too much and the signal is dropping out. The test monitor would more than likely be "Hi-Z" loading and therefor not causing the signal to drop." I believe most of the DVR takes 75 -ohm as their input, doesnt it? Thanks for the help, Howard

Hi all, I have got a question here regarding my installation problem. Such a weird thing happens here, my installer tested the camera on LCD testing monitor and it showed image on the testing monitor. It seems normal. However, when my installer plugged in camera into the DVR, the DVR recognizes the camera as VIDEO LOSS. Testing monitor used are the BNC-RCA type, and the DVR is using BNC-BNC type. Any idea on what has happened here? Any input is so much appreciated here. Regards, Howard SMARTEC

@tom : the cameras are powered locally, what i mean by 750 meter distance is the distance of running the video cable. @rory : what i can possibly think now is the power is not grounded properly, because i have one issue before whereas the camera could show video loss for quite some times, and after a while it goes back to display some images. really hope that is the case. all the rg6 coax that i used are copper in and out for sure, what are the differences of the aluminum and copper one? what do you the solution is if the signal is not strong enough? get an amplifier? regards, howard

@tomcctv: The amp that PSU using is 1amp 12V DC, and the cameras have various distances to the DVR, some of them are about 2500 feets, and some of them are about 150 feets. One of the camera that has distance of 2500 feets shows on the dvr, but the rest of them do not show on the dvr. But when we are using LCD Testing Monitor, we can see all of the camera. @soundy: I will try to use the T connector too, and see whether it works. I will let you guys know about it. But has anyone encountered this so far? thanks for the input again guys. will let you guys if i can solve it. regards, howard

@harrar: i am using 12 V DC camera, and it's done locally at the camera end, so i am assuming the camera power isnt the problem here, but i will check it again whether it's because of the power that i am getting at the camera end. Hopefully it's the power problem. @soundy: i personally will do that for sure to check the signal strength of each camera. If the case is the ohm meter shows that it's outside than the acceptable range, do you think i should re-wiring the camera again? or there is a device to help me on that? thanks for the help guys, i really appreciate it. regards, howard

@rory: It's RG6 coaxial cable. Any idea on testing how strong the signal is? The thing is some of the cameras are okay on the DVR, not all of them, which make me confused. If all the camera is not find, then it's easier to find out the solution to it. I have tried plugging the cameras that arent showing up on the dvr into the channel which are showing cameras, and it still doesnt show anything on the dvr. So, my guess the dvr is fine at the moment. What do you think? Thank you for the insight though. Regards, Howard

@soundy: the DVR is standalone DVR. I do not see any input to be "enabled" in the setup. The weird thing is from 20 cameras that I installed, only 5 of them display images on DVR, the rest of 15 cameras do not display any image on the DVR. However, when I test the camera using the 3.5" LCD Testing Monitor, all 20 cameras display the image on the Testing Monitor. My installer connect his monitor at the DVR end of cable, not at the camera side. And the cable used are RG-6 cable with various distance. Few of them are with 3000 feet long, some of them are 150 feet long. Bad connection could be one of the issue, but one of the camera with the distances of 3000 feet shows image, but the one at 150 feet doesnt even show any image. And for the one with 3000 feet, we are using video amplifier to boost the signal. I have also tried to change into different DVR. But, the same thing happens, only 5 cameras display the image. Any more idea of what is going on? Thank you for any advice. Regards, Howard Ng

Anyone has any idea regarding this? I have my brain stuck on this for few days, and haven't found the solution yet. It will really help to have any suggestion. Thank you in advance. Regards, Howard