12Chapter 1 -- IntroductionFeaturesYour color digital disk recorder provides recording capabilities for eight camera inputs. It providesexceptional picture quality in both live and playback modes, and offers the following features: 8 or 4 composite video inputsWJ-HL208 is 8-channel modelWJ-HL204 is 4-channel model H.264 codec for efficient digital video recording Real time recording200 ips with standard (CIF) resolution (8-channel model)100 ips with standard (CIF) resolution (4-channel model) Selectable 4 recording qualities (Very High, High, Standard, Basic) Selectable 3 recording resolutions (D1, Half-D1, CIF) Multiple Recording mode (Time-Laps, Pre-Event, Alarm, Motion and Panic) Multiple Search engine (Date/Time, Calendar, Record table, Event and Motion) Easy operation with user-friendly GUI (Graphical User Interface) and mouse 4-channel audio recording and 1-channel audio playback Camera control via RS-485 (Panasonic and Pelco-D protocol supported) Continues recording while transmitting to web browser and during playback Self-diagnostics with automatic notification including HDD S.M.A.R.T. protocol Equipped with 3 HDD slotsTechnical OverviewIn addition to replacing both a time-lapse VCR and a multiplexer in a security installation, your recorder hasmany features that make it much more powerful and easier to use than even the most advanced VCR.The recorder converts analog PAL video to digital images and records them on a hard disk drive. Using ahard disk drive allows you to access recorded video almost instantaneously; there is no need to rewind tape.The technology also allows you to view recorded video while the recorder continues recording video.Digitally recorded video has several advantages over analog video recorded on tape. There is no need toadjust tracking. You can freeze frames, fast forward, fast reverse, slow forward and slow reverse withoutimage streaking or tearing. Digital video can be indexed by time or events, and you can instantly view videoafter selecting the time or event.Your recorder can be set up for event or time-lapse recording. You can define times to record, and theschedule can change for different days of the week and user defined holidays.