Dipol_CCTV

30m is nothing for video transmission over coax. Triset coax cable can reach 600m or more - Ive checked myself.

If it is an IP camera, then You apply the same rules that You do in LAN - 100m for UTP.

By recording triggers You mean to have some kind of an icon/OSD on the screen saying that doors are opened/closed etc? What does CCTV have to do with it? any picture should be recorded as well or just a log from the sensors?

If analogue would suffice, Id say go for a mobile DVR with alarm inputs: http://www.hikvision.com/en/Products_show.asp?id=6110

If there should be HD picture, I'd say he should consider something else - perhaps a separate log/video system - it might be cheaper.

If a list of his demands is big, I'd recommend to look for some talented programmer and ask him to help to create a special app on android platform for example and to integrate whole thing on a tablet. It might be the best choice considering customization that is desired.

I'd say that You should invest in analogue DVR + analogue cameras. This way You'll be able to see preview via internet (also phone apps dedicated to each DVR) and You'll have a guarantee that system will be stable. Using IP cameras would be better, but it might be more expensive to buy a system that will have all the functionality You desire.

I believe that turning on 'compatibility view' will solve the problem It is that torn sheet of paper icon next to address.

There are two major things You need to set in camera before it will spin. Address also called ID, and protocol (not only the name, but also baudrate, parity, ....).

Those things You configure both in camera (dip switches) and in DVR. Then You connect RS + and - accordingly.

Well, I am working with cameras for a few years now, and I can say that IR is IR. There should be no need to specify any more details.

The wavelength however might or might not be visible by human eye. there are two types of illuminators on the market:

850nm wavelength - visible by human eye

940nm invisible from some distance, but when You get closer, it will be seen.

As for power consumption, it depends on the LED used in device. Most powerfull IR illuminator we have now is 10W power consumption. (90m range).

Same range 940nm consumes more power than 850nm.

Does Your camera have ICR (mechanically removable IR cut filter)?

Camera might just turn to b/w but it does not mean the filter is off.

Also what is the range from IR illuminator to the point of observation and what is the range from this point to camera?

Check Your DVR possibilities first! Check if its Sata or ATA connector.

Then You should consider buying HDD> Seagate or WD would be my choice. Also Id go for CCVT dedicated series.

If You get 4 days for 160GB, then You need 4,25*160 to get 14 days. In short - look for 1TB HDD.

If You DVR requires ATA HDD, it might be a good idea to change it to new one. Not just because HDD is hard to find, but also because the quality of recordings might be questionable. 8ch DVR's nowadays deliver good quality with reasonable price.

Well, for me it quite obvious. While the cable was cut, tool that did that was a conductor and it made a short circuit between power and video lines. This caused 12V go to motherboard and simply fried IC. To check it simply take video plug form channel that works OK, and connect it to ch4. If there is still no picture, it means the problem is with DVR.

I used to deal with Aver NVR's and hybrid sollutions.

Now, for your described installation, I'd say You should look into SIGANL. Its possible You find all You'd like in this device.

Id say few factorm may be a reason. First I'd look if ICR (if it has one) is not damaged. Second, I'd blame settings - reset should help. If not, hardware (sensor or DSP) is broken.

It might, but I guess the real problem is with placing the camera. Its just not the good spot. And no enhancing algorithms will be able to render 100% good image.

I'd say You should look for new place to mount it and also ifYou consider looking for a new cam, day n night porpoise, ICR is a must.

As far as I am aware, this option was not possible in this model.

In general, automatic external backup without user command was considered a security threat and was never applied to most DVR's.

How much would You like to back up? Whole day or just some parts?

Recording from inside rises a problem. At night, when most sittuations ahppen, Zou should have IR illuminator beaming on the location. If its from inside, it will reflect from window and picture will be unclear.

Id recommend discrete vandal proof cameras outside. ICR and IR are mandatory. Add DVR, HDD, some coax cable, monitor and power adaptors and You have a system.

I see the post has been submitted a while ago, but I guess there are some people that might read it,so:

1. For outdoor use You should use vandal proof, ICR and IR illuminator camera. Its not so hard to find one.

2. PoE is for IP cameras, but You consider analogue. For analogue You can use power over coax. Or if the distance is not too long, You can just use regular 12VDC power adaptor.

Id also make sure that at least one camera is visible - You can scare away any potential intruders just by having cctv. Its presence factor is often underestimated.

It depends on DVR, but nowadays I see most manufacturers actually use SPOT as video output that can keep a picture from one channel or rotate them. Old DVR's had more options for SPOT, but now it seems that VGA and HDMI are more important for firmware and hardware developers.

You basicly have 2 options.

1. You use switch with PoE ports. You connect cameras to those ports, and You use regular one to connect it to PC/mac. You dont worry about PoE, as long as the distance is OK.

2. You use regular switch and add PoE power adaptors. You want to do it, if You already have some switch.

I'd just ask for SDK - most manufacturers have it. What kind of DVR is that?

Also some DVR's can stream RTSP - try that.

Analogue or IP cameras?

If analogue then use active video transformers and use UTP cable. Example:

http://images.dipol.com.pl/images/info/000000052.gif

500m is too much to use passive transformers.

If those are IP cameras, then 100m is a maximum distance between camera and lets say switch.

Im pretty sure its impossible to record something via USB. All DVR's prepare and format their HDD's before they record and they allocate them with empty file templates,. That's because they have no time to do it while video is streaming and is compressed.

USB backup also has restrictions. I.e. its very likley that DVR wont recognize USB HDD unless its formatted in FAT32 file system. Yes, it also means that it can have maximum 32GB. If You have a larger HDD make a partition of that size.

In my opinion we have 3 technologies right now:

- analogue - good old PAL/NTSC cameras with maximum 4CIF resolution - here I'd say the latest are Effio-P DSP+Sony sensor, 650TVL. Perhaps there are some standards that are younger, but I reckon this one as most popular.

- IP Cameras - well here's a bit different. Here the main role is on NVR's side. Latest are ONVIF/PSIA standard support 2.0MPx cameras. Yes, I know there are 5, 6, 10 or higer resolution IP cams, but FullHD is a settled standard and its not so expensive to get,

- HDSDI - well its basicly HD resolution via coax cable. No network, no compatibility issues, just plug n play. Still quite expensive.

DVR is analogue or is it NVR? Well, it should have VGA (D-Sub video out). You can use it to divide the signal by a device simmilar to this:

http://www.wholesaleelectronicscheap.com/img/p/m/vga-splitter-1-input-2-output-2828-1.jpg - VGA multiplexer

and then You can convert the video to UTP by device like this - VGA to UTP converter.

This solution has a minus: anyone will see the same picture. And they will have to change video source on TV to PCin every time they want to access preview.

Hi!

one month or week.

so which is it then? I'd say You should consider IP camera with SD card. Its a future and SD picture is way worse than HD.

But if You have decided for SD, I guess You should buy a DVR + 4 analogue cameras, place them in Your store and use DVR video server for remote preview.

DVR can use only one HDD 2TB, which is more that sufficient for 1 month of recordings in 4CIF(PAL=704x576).

Besides for security reasons, its better to record somewhere on hidden DVR than on SD card in camera. SD cards should be considered only as a redundant recording.

Hello. I'he been dealing with Hikvision for a long time and I also know Dahua. They are Chinese manufacturers. I had more experience with Hikvision. I believe their products are good quality and reliable. Their DVR's also have some nice functions implemented (can distinguish motion detection between camera sabotage, and some more..), their OSD and apps look more professional and free software is really nice. I'd recommend Hikvision.

Sure, just use video signal multiplexer 1-->2. Put one cable to DVR and second one to quad. Same with second camera. Then You'll have no problems with DVR - no one will change anything in menu - You'll separate DVR form preview monitor. It also has a bit of a problem - to playback You will have to go to DVR, but if You use it rarely, is shouldn't be such an inconvenience.