JVC GR-DVF25 manual About DV

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4EN

ABOUTDV

The digital camcorder converts incoming audio and video signals into digital form for recording.

A video signal is composed of a luminance signal (Y) and colour signals (R-Y and B-Y). These signals are identified and recorded digitally (Digital Component Recording). The A/D (Analogue to Digital) converter samples the Y signal at 13.5 MHz, and R-Y and B-Y at 6.75 MHz, and changes them to an 8-bit quantum signal.

Sound sampled at 48 kHz is changed to a 16-bit quantum signal, and sound sampled at 32 kHz is converted to a 12-bit signal.

NOTE:

The data recorded on a tape is digital, but the output of this camcorder is analogue.

VIDEO

Luminance Signal (Y)

Lens

				Colour Difference
				Signal (R-Y/B-Y)

Chrominance (C)				Chromatic
AUDIO				Analysis



Mic
Mic

A/D

conversion

A/D

conversion

A/D

conversion

Recording by rotating head helical scan

Signal

compression

This camcorder separates the data into blocks, writing one block of each data type on each track of the tape.

Tape direction

Sub-Code Area

Video Area

Audio Area

Head trackingITI Area direction

5.24 mm

6.35 mm

12 tracks/frame

1Sub-Code Area

The Time Code and Date/Time data are written here, separate from the video data. This enables you to display the date and time during playback, even if they weren’t displayed while recording.

2Video Area

3Audio Area

The digital audio signal is recorded here.

4ITI (Insert and Tracking

Information) Area

Insert editing and post-recording editing tracking signals are recorded here.

The digital video signal is recorded here.

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Contents GR-DVF25 It is recommended that you Dear CustomerThis unit is produced to comply with Standard IEC Publ About Batteries About DV Contents Charging the Battery Pack PowerUsing the Battery Pack Using AC Power Using a CAR BatteryCharge Marker Choose which one means charged and which means dischargedClock Lithium Battery Insertion/Removal Insert Battery in HolderRemove Battery Holder Pull out the battery holder RE-INSERT HolderDate/Time Settings Select Operation ModeAccess DATE/TIME Menu Access Recording MenuCont Open LCD MonitorOpen Cassette Cover INSERT/REMOVE TapeRecording Mode Setting SET Recording ModeFirst move the highlight bar to REC Mode by Set depending on your preferenceGrip Adjustment Viewfinder AdjustmentAdjust Length Shoulder Strap AttachmentTripod Mounting Attach StrapPower Switch Position Full Auto modePRO. mode Load a CassetteStop Recording Press Display ButtonRecording Indicaitons reappearShooting While Watching The LCD Monitor Recording Basic RecordingBefore the following steps, perform pg Interface Shooting Journalistic ShootingBrightness Control Feature Picture Stabilizer Basic RecordingZoom Zoom OutFeature Video Light To brighten the scene when natural lighting is too dimWhen blank portion is recorded on a tape Proper recordingRecording Advanced Features EN21 Displaying The Date And Time During RecordingSelect Function SET Function ParametersAdvanced Features Snapshot Mode SelectionSnapshot Snapshot RecordingMotor Drive Mode EN23Using Menu For Detailed Adjustment Make SettingEND Setting Select Function Parameters in DATE/TIME Menu or System MenuFactory-preset Recording Menu ExplanationsDate/Time Menu Explanations System Menu ExplanationsFade/Wipe Effects Effect SelectionFADE/WIPE Selection B K , , B WStore Scene in Memory Engage the Record-Standby mode Picture Wipe or Dissolve Selection P, P, P, P , P, P and PBefore the following steps, perform steps 1 through 3 on pg If you select Picture Wipe/Dissolve during recordingFader And Wipe Menu MenuRecording Advanced Features Select ModeDisable Mode Programme AE With Special EffectsShutter TwilightSepia MonotoneAuto Focus FocusingPatterns that are regularly repeated Access Manual Mode Item Menu Access Manual FocusAdjust Focus END Adjustment of FocusAccess Exposure Control If you want to reset the exposure, repeat stepExposure Control To darken the imageIris Lock Centre SUBJECT, Lock IrisIris To Return To Automatic Iris ControlWhite Balance Adjustment Accessment White Balance AdjustSelect Auto in . Or set the Power Switch to To Return To Automatic White BalanceEnter Setting Manual White Balance OperationExit Manual White Balance AD- Justment To Change The Tint For RecordingPlayback Basic Playback Speaker Volume ControlRewind or Fast-forward the tape Feature Still Playback Feature Shuttle SearchFeature Slow-Motion Playback Feature Playback ZoomEN Playback Playback MenuDisplaying The Time Code During Playback Playback SoundRecording sound Display Output sound When connecting the cables, open this cover EN Playback ConnectionsUse the provided Audio/Video A/V cable and S-Video cable Use the provided Audio/Video A/V cableConnectvcr Camcorder to TV or Connectinput VCR Output to TV Supply PowerTurn on the camcorder, the VCR and the TV Tape Dubbing Pull OUT Battery Holder Installing The BatteryRemote control uses one lithium battery CR2025 Functions ButtonsTo allow slow-speed search in either direction To stop Slow-Motion Playback in progess, press PlayPlayback Zoom Activate ZoomEND Zoom DownAccessmenu Playback Effect Select Playback Special EffectsStart Playback Select Playback EffectRandom Assemble Editing R.A.Edit SET REMOTE/VCR CodeSET Remote to Operate VCR Operate VCRMake Connections Select ScenesSelect Scenes USE FADE/WIPE on Scene Transition if NecessaryUSE Programme AE with Special Effects if Necessary Press FADE/WIPEPrepare Source Tape Automatic Editing to VCRStop Editing For More Accurate Editing Diagnosing VCR’S Against Camcorder TimingPrepare for R.A. Edit Choose a SceneAdjustment of VCR’S Against Camcorder Timing Access Playback MenuInput Correction Data Close MenuAudio Dubbing Begin DubbingPause During Dubbing Stop DubbingOriginal and new tracks are combined and output in stereo New track is output on both L and R channels in stereoCorrective Action Snapshot mode cannot be used Digital Zoom does not work Shutter mode of ProgrammeWhen using Picture Wipe Delay of a fraction of aPlaces subject to low Adjust the brightness Camcorder When the LCD monitor’s Fluorescent light reachesPicture Wipe function does not work Disappear Than 1 second to makeBattery pack, etc., clock Rear of the LCD monitor is hotImages on the LCD monitor are jittery LCD monitor or viewfinder indications blinkPower lamp blinks There are disturbances in audio Temperature To protect the battery, it isRecommended to charge it Charging is difficult in placesClean Exterior Clean LCD MonitorClean Lens After Use64EN Video Light Switch $ Power Switch Battery Release SwitchConnectors to r are located beneath External Stereo Microphone Input Connector MICIndications LCD Monitor/Viewfinder Indications During RecordingFunction 444Indications Function LCD Monitor/Viewfinder Indications During PlaybackFunction Pg , 7 Pg , 42Date/Time Display Exposure Control ...................................... pgFor safety, do not Avoid using the unitTo avoid hazard During useTo prolong service life Do not leave the unitTo protect the unit, do not To prevent damage to the LCD monitor, do notAC Power Adapter/Charger AA-V15EK ConnectorsCamcorder GeneralGR-DVF25