For an example, what lens to be used to view a gate with 22 feet width and 25 feet away from a 1/3 CCD Box camera(VB-H01)?
                f = h * D/H
                f = 4.8 * 25/22
                f = 5.4mm :
  From the calculation, the nearest lens available is 6 mm lens that suitable to view the gate.

Q4. How many types of camera are there?

A4. The general types of camera and their advantages are shown in the chart below:

Q5. Is it possible for a CCTV system to continue operate even when there is a black out ?

A5. Yes, to prevent CCTV system stops while power break down just add a UPS-C120 power back-up. UPS-C120 can last about 30 minute when used 4 pieces dome camera and 1 piece of 4ch recorder.

Q6. Is it possible to listen and record sound in CCTV system?

A6. Some camera can pick up the sound itself, For example,: VD-01A. Or adding an external microphone like V-MC01 and V-300LS for camera that does not have sound pick up. Addition to that, a few models of standalone DVR and PC base DVR card can record audio along with video.
4ch standalone DVR like VDR-MP04, XVDR-402, and 4ch DVR card like DV-4004 can record 4ch audio.
8/9ch standalone DVR like VDR-MP09ch, 8ch DVR-card like DV-4008 can record 8ch audio.
16ch standalone DVR like XVDR-1602, 16ch DVR-card like DV-3316 can record 16ch audio.

Q7. How to display CCTV video on more than one monitor?

A7. Some of standalone DVR devices have one video output only, so to distribute the video signal to more than one monitor, then, it will need to add a splitter, e.g. : SC-CD102 (1 in 2 out distributor), SC-CD104 (1 in 4 out distributor) and SC-CD108 (1 in 8 out distributor).

Q8. What kind of camera suitable to be used outdoor?

A8. Night vision camera is usually built with weather proof features, but it is totally exposed then a water proof housing is recommended to add on it, for example: VH-43+B006 or AH25+B006. Some housing has built in fan + heater for all weather, For example, H09V4+B006. Box cameras are commonly used outdoor with housing.
Outdoor PTZ camera are designed to be installed totally exposed to all weather because they have built in fan + heater and can be operated at -35'c ~ 55'c temperature.

Q9. What kind of camera suitable to be used indoor?

A9. All kind of camera suitable for indoor used, please refer back to Q4.

Q10. Is day and night camera same as night vision camera? In what distance a night vision camera still can pickup images?

A10. ‘Day and night’ camera is different from night vision camera. Day and night cameras are very low light sensitive camera. That mean when used in a dark places with a dim light, the picture will either become black and white, or with color but very slow shutter speed for light accumulation(which basically slow down object movement!). However, when applied to a totally dark place it’s would not be functioning well. As for night vision camera, it can even be used in a total darkness condition, as it is built with infrared technology.

There are several model of night vision camera which pickup the object image for different distance in the total darkness. For example :
VR-01 -- 5 ~ 10 meter in the dark
VR-02 -- 10 ~ 15 meter in the dark
VR-102 -- 15 ~20 meter in the dark
VR-51 -- 40 ~ 50 meter in the dark.

Q11. Are there any devices to protect a CCTV system from lightning strike?

A11. SC-SP001 is the surge protector video signal line, SC-SP001SPD is the surge protector for PTZ camera as it can protect the video signal, data and power surge and SC-SP002 in the surge protector for wireless antenna.

Q12. What kind of monitor suitable to be used for CCTV system?

A12. Usually for display purpose, a TV or a computer monitor can be used, depending on the recorder’s video output. However, as the nature of CCTV system is meant for 24hours a day and operate non-stop for more than a year, therefore a special CCTV monitor is more recommended because of its durability and the resolution. For example: CCTV TFT LCD Monitor series -- VLD-15 (15"), VLD-17 (17") and VLD-19 (19"). There have 1024*768 (VLD-15), 1280*1024 (VLD-17 and 19) VGA resolution and 500 TV Lines for video resolution. There have 30,000 hours (VLD-15), 50,000 hours (VLD-17) and 40,000 hours (VLD-19) lamp life times. A normal TV will be burnt or the images on screen will turn darker or colorless,
after a long period of operation time.

Q13. Can we magnify the playback image and it will still be clear?

A13. In general, to magnify a low resolution image on screen, the result is very bad; most of the times, we can’t see the detail of the object. The higher resolution of a recording device, the better the quality of the images produced. A high quality recorder like XVDR-1602 will be able to give up D1 resolution (720x576) images, and after magnifying the image 10-30 times, the images will still be clear.
Besides, a mega pixels IP camera can record the images in higher resolution (1280x1024), so magnifying playback image can be even clearer than the analogs camera, For example,: VCM-4200.

Q14. Live recording, video playback and internet viewing can be executing at the same time?

A14. Depending on the DVR recorder and the DVR card with the features of multiplex operation function. The general types of DVR and the differences are shown in chart below:

Q15. Is the quality of CCTV system mainly affected by the camera or the recorder?

A15. Actually it will be affected by all aspects -- the camera, DVR devices, cabling, wireless devices and power supply. To build a good quality CCTV system, all the aspects will need to be designed carefully.

Camera will depend on it firmware and resolution:
e.g.: VD-321 dome camera having 480 TV lines while VD-01A having 430 TV lines. Comparing the resolution, VD-321 is having a higher resolution than VD-01A dome camera.

DVR devices are depending on resolution, compression rate and frame rate.
Level of resolution: 4CIF (704x576)/ D1 (720x576) > 2CIF (704x288)/HD1 (720x288) > CIF (304x288) > QCIF (176x144)
Compression rate: MPEG 4, H.264 > modify MJPEG/ advanced MJPEG
Display or playback frame rate/speed: e.g.: 25fps > 12fps > 6 fps > 3fps > 1fps

*the above resolution unit is based on PAL color system

Q16. Camera can connected to a computer for viewing or recording purpose?

A16. By adding our DV series DVR card, the entire camera can be connected to computer for viewing and recording. Units of camera, features, viewing and recording resolution will determine which model of DV series DVR card to be used. For example, DV-4008 hardware compression DVR card able to connect 8 unit cameras. For more cameras just add more same model cards. It comes with powerful and professional DVR software. This software allows us to watch maximum 64 channel camera simultaneously in local or over the internet. The software also having PTZ control functions. For more information, please kindly refer to our official website.

Q17. What device can do the viewing and recording purpose other than using computer?

A17. VDR series DVMR devices can replace the computer to do the viewing and recording features. These devices having majority function of a computer DVR system. It can add in hard disk for recording storage. For example, XVDR-1602 able to connect 16 cameras in order to allow us viewing and recording 16 cameras simultaneously. It also comes with PTZ control functions. These devices allow us to monitor, playback, setting and PTZ control over the internet.

Q18. How long can the DV series DVR card and VDR series DVMR record?

A18. It will depend on the capacity of the hard disk provided. The bigger the hard disk can record the longer time. Besides, these devices can do the recording according to schedule or event setup. Event records are alarm triggered record and motion detect record, it will only record if and only if there are any alarm triggered or motion detected. So with these features can help to save recording times. Furthermore, different type of compression format will give different recording capablity. For examples, VDR-2016w is using M-JPEG as its compression while XVDR-1602 using H.264 as its compression. By comparison, H.264 is higher compress than M-JPEG so XVDR-1602 able to record longer times if using the same capacity of hard disk and same setting.

Q19. Can these devices view remotely from another country?

A19. Yes. Majority of the DV series DVR card and VDR series DVMR can be viewed remotely through internet. Remote client software or Centralize Monitoring System (CMS) are usually used for remote viewing. Remote client software usually connects 1 to 1, while CMS able to connect several devices together for purposes. Example like Pro Surveillance software is CMS software that allows connecting several XVDR series DVMR (XVDR-1602) simultaneously. It allows us to control and monitoring several XVDR series DVMR in a same place or different places.

Q20. Compare to PC based and Standalone DVMR, which one is better?

A20. Basically it will depend on the user, what features do user need, capability of the user and etc. DV series DVR card and VDR series DVMR cover almost all kind of features and all different standard of usage. For examples, all DV series DVR card able to monitor with a 3G cellular phone over the internet while not all VDR series DVMR able to. In other way, a not computer literate user will not easy to use DV series DVR card.

Q21. Can a camera be controlled? Like to make the camera turn to the left and right, pointing up and down?

A21. Yes. All our VSD series speed dome cameras are controllable camera and for normal camera also controllable by just adding PT scanner. These devices can pan 45o, 90o, 180o and even some devices can pan 360o unlimited scanning. It also can be 45o, 90o and 180o tilting depending on devices. For examples, VSD-02 is a speed dome that can do 360o unlimited panning, 180o tilting and 26 times optical zoom, while a VYA-3040 pan tilt scanner can do 355 panning and 90 tilting.

Q22. How to control these PTZ cameras?

A22. VK series keyboard are used to control PTZ camera. However some of our VDR series DVMR devices or DV series DVR card having the controlling features. Some of these devices even allow us to control over the internet. For examples, VK-101 keyboard allow us to control 256 PTZ cameras with its 3 axis joystick and multifunction buttons. XVDR-1602 16 channel DVMR can control 16 PTZ cameras at local or over the internet.

Q23. How to hide a camera so that it cannot be noticed?

A23. We have VMP series and some modified camera that is easy to be hidden and not easy to be noticed. Different model have different shape for purpose of easy to hide and install. For examples, VMP-311 is thin and small so it is the most suitable to hide inside a box or inside a wall. A spy sunglass is a modified camera that camouflage as a sunglass to avoid noticed by a suspect.

Q24. Can the network cable (CAT-5e) be used to install CCTV?

A24. We have smart cabling devices like SC series product which can use network cable to join the cameras. In other way, our VI series IP cam are using network cable also.

Q25. What is IP camera?

A25. IP camera is a new generation of camera which is totally digitized. The camera used network system to link to a computer as a system. So we have different series of IP camera to serve different usage. Example VCM-4200 IP camera is a 1.3 Megapixels IP camera, it allow us to record and capture a 1.3 MP video.

Q26. Can the CCTV products used for a long period of time ?

A26. VZOR, SONY and neoV CCTV devices are well designed for 24 hours 7 days operation. So there is no worry to make used of these product for a very long period provided that the installation is properly done.

Q27. How long the cable can be pulled and will it get interfered?

A27. It depends on the material of the wire. For a general quality RG-59 coaxial cables in the market (especially made out of aluminium or steel as the core and wire inside), within 100m, the signal will be interfered due to the condition of the surrounding. While a full copper high quality RG-59 cables will able to use up to 200m and still producing high quality images/signal.

Q28. If the cable length is too long, what device can help in maintaining the signal strength ?

A28. Signal booster or converter can be added in order to allow the signal still able to receive in distances. For example, SC-TTA111VT and SC-TTA414VR converter will convert the signal into a CAT-5e cable signal in order to transfer the signal up to 1500m(Colour) or 2400m(B/W).

Q29. It is better to use an analog CCTV system or an IP based CCTV system?

A29. Both of the systems have their specialty, advantages and features. The system will be used due to the needs of the users. For examples, VCM-4200 IP camera can capture and record in 1.3 Megapixel which cannot be done on analog camera. However, IP cameras are not convenient to be used by a user without computer knowledge, analog CCTV system will be much more user friendly in this sense.

Q30. Basically different system would have their specialty?

A30. Basically different system having their specialty, they have different features, different level of usage, and etc. However it is recommended to discuss with our experienced sales engineers in showroom. They will help to design and provide the most suitable system or solution for you with a “what you see is what you get” demonstration.