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DVR FAQ

Features
About Recording
About Video Quality
About Event List and Playback
Video Backup

Peripherals
Output Interface
Input Interface
Accessories

General
Lighting Condition
Secured Installation

Features

About Recording

Q: How to calculate the hard disk capacity according to the required recording period?
A: Follow the link to download our “Total hard disk size calculator”. Fill in the recording parameters into correspondent fields and the capacity will be calculated automatically.

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Q: What is recording mode?
A: iFocus has three independent recording modes which can also be programmed to work in combinations. They are manual, for continuous recording, trigger, for recording upon motion detection or external trigger, and timer, for schedule recording. Our factory default setting is combination of manual and trigger, for which DVR records continuously and at the same time, events like motion detection and external trigger will be logged in the event list to assist in playback and investigation.

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Q: How to use the alarm input trigger terminals?
A: The alarm input trigger terminals can be used for passive infrared (PIR) sensor, door magnetic switch, gate switch, external motion detector, ATM card reader and any other equipment with trigger output. Once the trigger recording is turned on, DVR will record whenever the input is being triggered. Such event is logged in the event list to assist in playback and investigation.

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Q: How to use motion detection recording?
A: iFocus DVR provides video motion detection (VMD) for individual cameras. There are three kinds of VMD settings for each channel, full screen detection, user-defined-zone detection and via-CMS detection. User-defined-zone is two rectangular detection zones with user-defined size and position while via-CMS detection is using iFocus Central Monitoring System to perform VMD tasks. User can define the detection area as a line or any enclosed shapes. Only motion detected in the detection zone will trigger DVR recording.

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About Video Quality

Q: What are normal, high and super video qualities?
A: The three levels of video quality represent the video compression rate when the DVR records images. The higher quality, the lower compression rate which means each frame will have a higher resolution during playback. As a result, the playback video is much detailed and clearer if the quality is set higher. But of course the video takes more hard disk capacity than a normal-quality does.

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Event List and Playback

Q: What is [SFP] in the playback menu and how to use it?
A: SFP is single frame stepping playback, for which DVR plays the next frame when user presses "play" botton on the remote control. It allows the user to see the playback without missing any frames. The feature is useful when detailed search and investigation is required.

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Q: What is event list and how to use it?
A: Event list is a log keeping system and recording related events, e.g. system power recovery, user log in, recording on and off, motion detection, video drop and etc. It is useful in both playback and system health monitoring. iFocus DVR also groups the events into four categories so that a filter can be applied to mask the events and speed up the searching process.

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Video Back-up

Q: How do I back-up my video files?
A: iFocus DVR provides various ways to back-up video files, using a built-in DVD drive, in IE WebDVR application, in the iFocus Central Monitoring System (CMS) if the DVR is connected to the server, or purchasing an industrial 19"-rack DVR with hardware mirroring feature. Each method has its own advantage in different types of applications. A built-in DVD drive is most applicable when there is no network connection on site. If there is, backup through IE WebDVR application is recommended. For large systems with several DVR, the backup video usually calls for channels from different DVR. CMS in this case is useful as it can stream video from different DVR in a single user interface at the same time. All above methods is good for video backup for relative short period. When it comes to whole-hard-disk backup, DVR with hardware mirroring feature is highly recommended. Whenever a slave hard disk is replaced by an empty one, the database will be automatically built according to the master hard disk and the recording will be resumed to the new one.

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Peripherals

Output Interface

Q: Can I use the output from DVR to drive external devices?
A: All iFocus DVR outputs are open-collector, capable of driving 100mA current. As long as the external device does not require more than that, the DVR can drive it directly. If the external device needs more than 100mA output, user should select those with input relay control or pull-up resistor TTL input control.

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Input Interface

Q: What devices can the +12V output support?
A: The +12V supply supports current output up to 400mA. This is enough for 3 auto iris cameras and 2 PIR sensors. As the current consumption of camera and other CCTV devices vary from vendor to vendor, user should consult the supplier on the current consumption when using the +12V output to support these devices.

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Accessories

Q: What accessories do iFocus DVR support?
A: Accessories that usually work together with iFocus DVR are external IR sensor, remote control, modem, RS232 converter and PS2 keyboard.Except for external IR sensor and remote control, all accessories can be purchased at electronic device outlets. iFocus DVR support both PSTN and GSM modem. Please consult our technical stuff before purchasing to ensure compatibility. External IR sensor is needed when the control point is far away from the DVR physical location or when the unit is hidden. All iFocus DVR come with a remote control when it is delivered. It can also be purchased separately if the users requires more.

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General

Lighting Condition

Q: How does lighting condition affect CCTV cameras?
A: The performance of light sensor such as charge coupled device (CCD) depends on the lighting condition of its surroundings. Always consult camera suppliers when you are not sure which camera to use. iFocus DVR also provides a feature called smart adaptive exposure (SAE) which automatically adjusts the brigthness of the video for day/night recording with standard low-lux CCD cameras. Besides brightness adjusting, it also reduces noise level during recording so that the playback video is clearer and the video file size smaller.

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Secured Installation

Q: Can I hide the DVR?
A: The DVR is designed in a way that it can be hidden when an external IR sensor is connected to it and placed near the monitor. This method of installation prevents DVR from being taken away or damaged by any intruders.

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