Q-See QSD42908C8 user manual Appendix B HDD Capacity Calculation, = d i ⎟ 8⋅ 3600 ⎟1024

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QSD42908C8 User’s Manual

Appendix B: HDD Capacity Calculation

To calculate total capacity needed by each DVR according to video recording (video recording type and video file storage time).

Step 1: Use Formula (1) to calculate storage capacity qi that is the capacity of each channel

needed for every hour: unit Mbyte.

.

qi = di ⎟ 8⋅ 3600 ⎟1024

(1)

In the formula: di means the bit rate, unit Kbit/s

Step 2: After video time requirement is confirmed, according to Formula (2) to calculate the storage capacity mi , which is storage of each channel needed unit Mbyte.

	mi = qi × hi × Di	(2)
	In the formula:
hi	Represents the recording time for each day (hour)
Di	Represents number of days for which the video shall be kept
Step 3: Use Formula (3) to calculate total capacity (accumulation) qT		that is needed for all
channels in the DVR during scheduled video recording.

c

qT = ∑ mi

i=1

In the formula: c represents total number of channels in one DVR

Step 4: Use Formula (4) to calculate total capacity (accumulation) qT that is needed for channels in DVR during alarm video recording (including motion detection).

c

qT = ∑ mi ×a%

i=1

In the formula：a% means alarm occurrence rate

(3)

all

(4)

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Contents QSD42908C8 Net DVR User’s Manual Index Chapter 100 Tech Support Summary FeaturesProduct Introduction Network function OthersInstallation Checking the DVR and Its AccessoriesSystem Setup Rear Panel DescriptionIndex Type Name Description Operational InstructionsFront Panel Ready IR Remote Control Index Name DescriptionStarting the Remote Control Disabling the Remote ControlPowering Down the DVR If Remote Control Does Not WorkMenu Description How to enter into menu mode Main Menu DescriptionQSD42908C8 User’s Manual How to exit menu Input text Preview Power onBasic Operation Guide Recording status Form 4-1 Camera record status Icon Icon Color Status DescriptionAlarm status Change Password User name and passwordLogin QSD42908C8 User’s Manual PTZ Pan/Tilt/Zoom Control PTZ Control InterfaceAdjust Preset Description Start/Stop Auto in PTZ Control ModeSelect Channel PTZ Control Keys DescriptionDescription Exit PTZ Control ModeManual Record Playback Playback InterfaceDescription Playback With Mouse Attached Control Bar Functions Backup Recorded Files Backup Daily Recorded FilesSelect backup device Shutting down the DVR normally Using menu Using【POWER】key of front panel or IR remote controlPassword modification Parameters Setup GuideAdministrator and Password User management Enter into User Management menu shown in fig Add and Delete UserAdd user Add new user name Setup the password for new userSetup the rights for new user Save the new user’s password and rights User rights description LocalDelete user Remote through network or internetMAC address Device ID Unit Name and Device IDUnit name Video Output Standard and VGA Setup Camera name and OSD On Screen Display SetupVGA setup Video output standardCamera Name Position System TimeDate OSD Position Video Parameters Setup Mask Area Setup Disable the mask check box means cancel the mask area View Tampering Alarm Enter into Camera menuVideo Loss Alarm QSD42908C8 User’s Manual Motion Detection Interface shown as figClear motion area QSD42908C8 User’s Manual Preview Properties Recording Setup Preview propertiesRecording menu description Bit Rate TypeRecord type All day recording setup Enter into recording schedule menuSelect a day and enable all day recording option Select one day and disable all day recording option Setup time period and record typeCopy to other days SaveExternal Alarm Input and Relay Output External alarm input setupAlarm type Enter into Alarm in Handling sub menuAlarm trigger record channel setup Schedule for alarm handle methodAlarm handle method Save setupPTZ Linkage Alarm relay output setup Select delay timeEnter into alarm out schedule Setup alarm out scheduleExceptions Network Parameters Network menu descriptionAdvanced setup description PPPoE DVR supports PPPoE dail-up function Accessing the DVR over a network Accessing the DVR from a remote computer PTZ Pan, Tilt, Zoom PTZ menu descriptionPreset setup Sequence setup Cruise setup 18 RS232 setup RS232 menu descriptionSetup at DVR end Example PPP Modem passive dialup through PstnSetup should pay special attention to QSD42908C8 User’s Manual Establish the dialup connection Restore Parameters UtilitiesUpgrade Stop Alarm Out RebootPower Off Hard Disk ManagementView Log By TypeBy Type&Date For example The steps of viewing alarm logBy Time System Information Firmware Upgrade FTP Server SetupSetup username Upgrade Mode QSD42908C8 User’s Manual QSD42908C8 User’s Manual QSD42908C8 User’s Manual Step Step Appendix a Mouse Control Function Test input interface Scroll wheel forwardPlaylist interface User interfaceAppendix B HDD Capacity Calculation = d i ⎟ 8⋅ 3600 ⎟1024How to Make a RS-485 Connect Cable Appendix C DVR Connect Cable DefinitionMaterial and tool RJ45 introduction Pin definitionHow to Make a RS-232 Connect Cable How to Make a UTP network Connect CableCorresponding relationship of cross cable Appendix D DVR Specifications PAL 15FPS, Ntsc 20FPSAppendix D Camera Specifications Models QOCDC60 QOCDC36Appendix E Troubleshooting Failure Possible reasonsAppendix F Product Service & Warranty Appendix G Customer Information Card 101