marvincctv

Hi Peter, If only 15-20 feet that will be very easy. If the distance not more than 10 meters, you can use analogue camera. 16-27X all OK. 10X will be small a bit to see driver license. Marvin

Hi Brother, You will meet big problem with this PTZ camera. This is one very very cheap PTZ camera. Some small factories try to save any cent with their so-called products in Shenzhen city PR China. If possible, please add one DC12V fan and temperature control kit by youself. Or you will have to save a lot of time to repair it within next 4 monthes. Marvin Young

I know this PTZ camera. It's designed and made by one company which is only 1KM away from us. It's based on ARM7 chip designed. Using preset point to turn on /off wiper. One analogue video analysis alarm is the selling point. The wiper do one good idea, we are integrating one wiper with our PTZ camera . After 3-4 monthes, it can be ready. But price is not cheap Marvin Young

Hi. The key problem is the "auto frame adjustment" function begin to work. At day time, the camera is 25 frame per second (PAL) or 30 frame per second (NTSC). But, at night, the image will be poor than day time, so some factories tried to adjust the "frame rate" to make image looks more clear. I think your camera should be auto adjusted to 8 or 12 frame per second. Which type of camera you ordered from Ampire? The boss of Ampire is one Chinese, reputation is not bad. Just technology ability is limited. Please email the camera picture and type to marvinyoung@163.com Maybe I can find out the OSD menu operation way, then let you know how to turn off this function. Marvin Young

The key problem is you put the DC12V PSU too far from your cameras. For the output is only DC12V, if you make the power cable more than 2 meters, the output voltage will be about 9V. At day time, the IR light don't work. But at night, when the IR light begin to work, it make the input voltage lower than 9V that is the deadline for board camera to work. No need to any more, just put the DC12V PSU with your camera together. Make the DC12V power cable length less than 0.5 meter, then everything will be OK Marvin

Hi, Your boss' demand is almost impossible to be done. But I suggest you fix three times of camera quantity. Make the room to be 10 or 20 small spaces, then make everyone camera focused on one small space. If the space is small, the resolution will be very high. Of course, you need use high quality long lens or zoom camera. Marvin

Another important point is you must begin to learn how to repair camera. Even the fault rate of our cameras is very low, but some installers' head is totally different compared with 10 years before, some of them short of experience and education, all kinds strong problem happened in the last 3,4 years. With you description and photo, we can know where is the problem, then we can make one instruction about how to repair. But you must do it by youself. Or the shipping cost is too high to be accpeted. Regards Marvin Young

Hi Not only you but also a lot of CCTV man think the cargos from Longse and Cantrok all spam. They using the cheapest raw material, and leave off all protection circuit. Lens are also the cheapest. How could you to get one qualified products with all worest parts. If you want to order from Chinese factory directly, you'd better know the working way of cameras firstly. And only order 1 or 2 pieces sample before order in quantity. Then fix the sample out of your office for 3-6 months test. If the samples can working fine after half year, you can trust this supplier. Before you order in quantity, you must know what you need, then let your supplier know what you need clearly. Don't hold only several USD price different, several USD can make you avoid big trouble from after-sell service. Technology discussing is welcomed. Any problem about CCTV

hi TOMCCTV : Do you know what's RS485 singal standard? What's RS232 ? What's RS422? What's the different between them? All the standard is from USA. After 1970, in order to make good coummunication between devices, the RS232 standard be made out. But the communication distance of RS232 is too much short, then RS422 be used popular. RS485 is the improved communication standard of RS422. RS485 A: 2-6V ; Rs485 B: -2 to -6V. You'd better back home to read colleage again.

the flip mean when the camera to the horizontal position, the camera will turn to other size. And image will turn over. If the tilt only can move to 45 degree, then can't move any. Maybe the problem is the dome camera can't find the "0" position The tilt direction turning is from "0" to "90" degree, then auto flip, then from "90" to "0" degree turning. If the dome can't find the ture "0" position, it can't know where is the ture position. There is one switch on tilt turning gear. You'd better take a check. Maybe this switch out of work. The switch be used to send one signal to singlechip for "0" position Marvin Young www.uaichina.ne

Hi Minking is one old PTZ factory. At before, the quality of MINKING PTZ was a little better than others. But after they be purchased by CSST, the quality becoming poor and poor. The quality of new products even worse than small factory. In China, there are a lot of factories. And the production becoming more and more special. Some only focused on one or two products. If you want to source cargo from China directly, you should make clear what's you want to purchase. Then decide which kind of factories you can check. Anway, it's one really hard job to check factory one by one for there are more than 5000 CCTV facories all over China. Marvin Young www.uaichina.net

Hi DC12V is one very low voltage. With our test result. If the DC12V is powered with net cable, the longest distance only can touch 8 meters. If longer, the camera won't work for the outpu voltage already lower than 6 voltage. 50 meters is also one long distance for RS485 communication. RS485 is voltage signal from 4V to 9V. Marin

Hi Can you give me the detailed instruction your PTZ camera? Seems, the PTZ camera didn't do the last "stop" command from controller. For Pelco protocol, every command constructed with one series 16 bits code. At the last of this 16 bits code is the stop code. If the CUP of PTZ camera is already 100% working for motion command, it will skip the stop command. Which PTZ camera you are using? Marvin uaichina@126.com www.uaichina.net

Hi If you want to using AVTECH DVR to control other brand PTZ, maybe you can call the No.95 preset piont. In the standard Pelco protocol, the No.95 preset be used to adjust the OSD menu on PTZ itself. Marvin Young www.uaichina.net

This Marvin Young RS485 signal amplifier do exist. When the RS485 communication signal be affected by 220V or other signal or the transmission distance is too much long, you will need amplifier .