tuannd

I have tested some AVTECH Camera and have the some follow problem : 1. In indoor eviroment, under lamp light, the video was flicker with Model KPC-133C - 1/3 CCD HR Color IR Dome Camera 520TVL, 21 IR, but the cheaper model KPC-133B - 1/3 CCD IR Dome Camera 420TVL, 21 IR didn't have this flicker problem 2. Camera KPC-136C, KPC-133C also have blear problem when light was low. Could any could help to explain in deep technical what are the reasons of above problem and there is away to fix, resolve this problem Thank you TuanND

I wonder what are differences between AVTECH AVC and KPD Model such KPD671, KPD672, KPD673 and AVC790, AVC791, AVC792 I hear rumous that AVC model use more powerfull hardware to compare with KPD, but what are exactly difference ? Please help to clarify ! Thank you TuanBeo

I just bought AVTECH DVR AVC760A, and when enable Motion Detection for Camera, then view recorded video, I see that DVR make record of all 04 channel. It was not need to record all channel with just motion detection in one channle, and it is comsume extra HDD. Please advise how to setup so the DVR only record motion channel Thank you TuanND