DIGITAL VIDEOCASSETTE RECORDER DVW-250/250P
Chapter 1 Overview 1 Features........................................................... 1-1 1-1-1 Features of the DVW-250/250P............. 1-1 1-1-2 Digital Betacam Format........................ 1-1 2 System Configuration .................................... 1-2 3 Getting the Best Performance from the Unit .......................................................................... 1-3 4-1-5 Selecting the Monitoring Mode for Recording...............................................
The DVW-250/250P is a portable videocassette recorder in the Digital Betacam series. It allows recording and playback of sound and picture in the Digital Betacam format. The following are some of the features of the DVW250/250P. Flexible input/output interfaces The unit is designed to accept either analog video (component/composite) and audio signals, or Dl format serial digital video/audio signals. It is therefore highly suitable for use not only in analog systems but also in all-digital systems.
The following figure shows the configuration of a typical system centered on the DVW-250/250P. For details, such as the connector names, see Section 4-1-1 "Connecting Digital Equipment" (page 4-1) and Section 41-2 "Connecting Analog Equipment" (page 4-2).
Notes on operation and storage Cleaning the video heads Protect the unit from violent shocks It is possible to damage the internal circuitry and mechanism or spoil the external finish. Use the Sony BCT-5CLN or BCT-D12CL Cleaning Cassette for cleaning the audio and video heads. Follow the instructions with the cleaning cassette. After use Turn the power switch off. Related manuals When not using the unit for a long period Remove the cassette and batteries.
The front panel is divided into four sections as follows: • Operating controls • Status indications • Adjustment controls • Time code setting controls Of these, the controls for time code settings are normally covered by a hinged lid.
2-1 Front Panel Operating controls button and indicator REC (record) button and indicator EJECT To start recording, press this button and the PLAY Press this button to eject the cassette. The indicator button simultaneously. The indicator flashes during lights while the cassette is being ejected. recording. By pressing this button alone while the tape transport STOP button is stopped, or during fast forward, rewind or playback, Press this button to stop the tape transport.
down the PLAY button then press the REC button, recording starts immediately, but there may be picture breakup. However, once a cassette has been removed and reinserted, even pressing the REC button then the PLAY button may sometimes not result in a proper join. Cassette compartment Raise the lid in the direction indicated the cassette. and insert REW (rewind) button and indicator Press this button to rewind the tape.
2-1 Front Panel Status indications Status indication panel This displays warnings, the tape remaining, the battery capacity remaining, the operating status, and time indications. HUMID: There is condensation on the head drum. Alternatively, the humidity is high. SLACK: The tape winding is not correct. For more details, see the section "Warning Indications" (page A-1).
Time indications This display shows the value selected by the DISPLAY switch from CTL (control track running time), time code, or user bits. However, if the REAL TIME record/set switch (see page 2-9) in the time code setting controls is in the SET position, the real time appears here, regardless of the DISPLAY switch setting. Tape remaining indication This shows the length of the remaining tape.
2-1 Front Panel Adjustment controls Signal level and menu display Pressing the DISPLAY button in the display operating buttons cycles this display through the audio level meters, video level meters, and setup menus. When the unit is powered on, and whenever five minutes elapse without an operation, the display reverts to the audio level meters. When the display is showing the audio level meters, the indication "CH CONDI" (channel condition) appears.
LIGHT switch This switches on and off the illumination of the status indication panel (see page 2-4) and signal level and menu display, and also controls the brightness of the indicators for the operating buttons. ON: Turns the display illumination on. OFF: Turns the display illumination off. BRT: Turns the display illumination off, and increases the brightness of the indicators. This makes the indicators easier to see outdoors, for example.
2-1 Front Panel Time code setting controls VITC switches These determine the lines in the vertical blanking interval in which the VITC" is recorded. For the DVW-250, the factory default is for switch A to be in position 6 (line 16) and switch B in position 8 (line 18). For the DVW-250P, the factory default is for switch A to be in position C (line 19) and switch B in position E (line 21). VITC REC (record) switch This selects whether or not to record the VITC. ON: Record the VITC.
DISPLAY switch This selects which time code is displayed in the status indication panel (see page 2-4). This switch is only effective when the DISPLAY switch by the status indication panel (see page 2-5) is set to the TC or UBIT position. LTC: Display the LTC (Longitudinal Time Code). VITC: Display the VITC. F-RUN/R-RUN (free-run/record-run) switch This selects the operating mode of the internal time code generator. F-RUN: The time code generator keeps running, regardless of the operating state of the unit.
This section describes the connector panel under the following three headings: • Audio connectors and controls • Video connectors and controls • Power supply and miscellaneous Connector panel 2-1 0 Chapter 2 Location and Function of Parts
Audio connectors :ors and ana controls CONFI (confidence) switch This selects the mode for monitoring during recording. Note that this switch applies to both video and audio. ON: Monitor the simultaneous playback of the recorded signals from the confidence heads. ECC (Error Correcting Codes): Monitor the input signals unchanged (in E-E mode). If a serious error is detected while recording the signals, a warning indication is given. OFF: Monitor the input signals unchanged (in E-E mode).
2-2 Connector Panel PHONE LEVEL control knob This adjusts the level of audio output to the EARPHONE and HEADPHONES jacks. AUDIO IN connectors (XLR in) These input up to four analog audio signals from external microphones or other equipment. +48 V switches (DVW-250P only) For each of the four channels, these turn on or off the 48 V microphone phantom power supply to the corresponding AUDIO IN connector.
Video connectors and controls COLOR FRAME switch This selects whether or not to enable color framing during editing or playback. ON: Enable color framing. Playback is always in units of four (NTSC) or eight (PAL) fields. OFF: Disable color framing. Playback is in units of two fields. CONFI (confidence) switch This selects the mode for monitoring during recording Note that this switch applies to both video and audio. ON: Monitor the simultaneously playback of the recorded signals from the confidence heads.
2-2 Connector Panel VIDEO LEVEL control If the composite signal input level to the VIDEO IN connector is not a 1 Vp-p signal, use a screwdriver to turn this control and adjust the input level. The range of adjustment is ±3 dB. Normally leave this control at the center detent position. It is not possible to adjust the input level for component signals or serial digital video and audio signals.
Power supply and miscellaneous RFU OUT connector This outputs video and audio signals and a power supply to an RF modulator such as an RFU-95UC. Connect to the input connector of the RF modulator. EXT (external) DC SELECT switch This selects the way in which the external power supply (to the DC IN 12V connector) is used. AUTO: The external power supply is normally used, but if the voltage drops, the unit switches automatically to the internal battery pack. FIX; The external power supply is always used.
This unit can operate from any of the following power sources: • BP-90A nickel-cadmium battery pack • BP-L60 lithium ion battery pack Using a BP-90A Battery Pack A BP-90A Battery Pack provides about two hours of ' continuous recording (when the unit is operated with the MODE switch in the SAVE position, the CONFI switch in the OFF position, and the setup menu item "SDI OUT" set to "OFF"). Before use, charge the battery pack using a BC-410/ 410CE Battery Charger.
3-1 Power Supply Using a BP-L60 Battery Pack A BP-L60 Battery Ppack provides about two hours of continuous recording (when the unit is operated with the MODE switch in the SAVE position, the CONFI switch in the OFF position, and the setup menu item "SDI OUT" set to "OFF'). Before use, charge the battery pack using a BC-L100/ L100CE battery charger. Charging takes about two hours thirty minutes. For details of charging, see the instructions provided with the BC-L100/L100CE.
Use the following procedure to power the unit from an AC supply. Using an AC power supply 1 Turn the POWER switch of the DVW-250/250P off. 2 Connect the DC IN 12V connector of the DVW250/250P to an AC supply through the AC-550/ 550CE AC Adaptor, as shown in the figure. While an AC power supply is connected, then regardless of the state of the POWER switch on the DVW-250/250P the time code circuits continue to operate, consuming some power.
3-1 Power Supply Check the remaining battery capacity in the status indication panel. When the battery pack is fully charged (supply voltage at least 13 V for the BP-90A or 16 V for the BP-L60), all seven display segments appear. The relation between the number of displayed segments and the battery pack voltage is shown in the following figure. Powering on and off Powering on and off Use the POWER switch on the front panel to power the unit on and off.
This section lists the cassettes which can be used, and provides guidance on their handling. Checking that there is no slack in the tape This unit uses Digital Betacam cassettes with a 1/2inch tape width for playback and recording. The following are the type numbers of the cassettes you can use.
3-2 Cassettes Loading a cassette Ejecting a cassette It is not possible to load a cassette unless the unit is powered on. Ejecting a cassette Loading a cassette 1 Turn the POWER switch on. 2 Raise the lid of the cassette compartment. 3 Check that the "HUMID" indication is not showing in the status indication panel, then insert the cassette. For details of the procedure when the "HUMID" indication is showing, see the section "Warning Indications " (page A-l).
When a tape is loaded, the "TAPE" indication appears in the status indication panel, and the seven segments flash. When the tape transport starts, the display continues to flash for several seconds, then the segments switch to displaying the amount of tape remaining. When this is 30 minutes or more all seven segments appear. When less tape remains, each segment corresponds to 5 minutes of remaining tape.
Depending on the environmental conditions, it is possible to adjust the brightness of the display panels and indicators. Adjusting the brightness of the display panels and indicators In a dark environment If the displays and indicators are hard to see because of low lighting conditions, move the LIGHT switch on the front panel to the ON position to switch on the backlighting.
This section describes the connections and adjustments necessary before actually carrying out recording. The following figure shows an example of the connections required when using this unit with a camera, VTR, video monitor and other equipment fitted with digital inputs and outputs in the SDI (Serial Digital Interface) format.
4-1 Preparations for Recording The following figure shows an example of the connections required when using this unit with a camera, VTR, video monitor and other equipment fitted with analog inputs and outputs.
Displaying and adjusting the video input levels Selecting the input video signal This unit accepts three different types of video input signals, selected by the video input selector switch as follows: • To select a composite video signal input to the VIDEO IN connector, select the left position (VIDEO . IN). • To select the signal input to the CAMERA (26-pin) connector, select the center position (CAMERA). There is a setup menu operation to select between using analog (Y/R-Y/B-Y) or digital signals.
4-1 Preparations for Recording • When the input signal is component video, the meters indicate the Y, R-Y, and B-Y levels. The maximum values for R-Y and B-Y correspond to a 75 % color bar signal. 3 If the input level of a composite signal is not 1 Vpp signal, use a screwdriver to turn the VIDEO LEVEL control to adjust the input level. It is not possible to adjust the input level of signals other than composite video.
Recording the same audio signals on channels 3 and 4 as on channels 1 and 2 Selecting the input audio signals Select the input audio signals as follows: When the video input is digital When the video input signal is digital in SDI format, it is possible to select in a setup menu whether to use the audio signals included in the SDI signal, or analog signals input to the AUDIO IN or CAMERA connectors. The settings for channels 1 and 2 and for channels 3 and 4 are independent.
4-1 Preparations for Recording 3 If the display is not showing the audio level meters, press the DISPLAY button in the adjustment controls until the audio level meters appear. Pressing the DISPLAY button cycles the display through the audio level meters, video level meters, and setup menus. If the display is showing the video level meters or setup menus, and five minutes elapse without an operation, the display automatically reverts to the audio level meters.
This selection determines the way in which monitoring will be carried out during recording. This section describes how to set user bit values, time code values and the real time. Open the lid covering the time code setting controls as shown in the following figure. Selecting the monitoring mode for recording Opening the lid covering the time code setting controls Use the CONFI switch on the connector panel to select the monitored signal.
4-1 Preparations for Recording 4 Use the SHIFT button and ADVANCE button to set the user bit value. SHIFT button: Cycles through the digits, flashing the digit to be changed. ADVANCE button: Increments the value of the flashing digit. Hexadecimal digits A to F appear in the sevensegment display as follows: • Set the REAL TIME record/set switch to REC ON or OFF. REC ON: During recording, the real time is recorded in the user bits.
3 Set the REAL TIME record/set switch to REC ON or OFF. 4 Use the SHIFT button and ADVANCE button to set the time code value. The range of values is from 00:00:00:00 to 23:59:59:29 (for NTSC) or 23:59:59:24 (for PAL). SHIFT button: cycles through the digits, flashing the digit to be changed. ADVANCE button: increments the value of the flashing digit. 5 On an NTSC system, set the DF/NDF switch appropriately. DF: Advance the time code in drop frame mode." NDF: Advance the time code in non-drop frame mode.
4-1 Preparations for Recording The relationship between the switch position and the line represented is shown in the following table. The factory default positions are 6 and 8 (for NTSC) and C and E (for PAL) for switches A and B respectively. Switch position VITC insertion line No.
It is possible to lock this unit to an external time code generator, or alternatively to lock an external device to the time code generator in this unit. Locking this unit to an external time code • Once the unit is locked to an external time code, color framing is disabled. To apply the color frame lock, first switch the F-RUN/R-RUN switch to R-RUN, then return it to the F-RUN position. For an explanation of the color frame lock, see the footnote on page 2-4.
4-1 Preparations for Recording Time Code Locking of Two or More DVW250/250P Units Connect the DVW-250/250P units as shown in the figure below. In this case, on each of the DVW-250/250P units, set the F-RUN/R-RUN switch to F-RUN and the CONFI switch to ECC or OFF. Then set the first DVW-250/250P so that it outputs the time code generator signal from the TC OUT connector. For example, when the "TC OUT" item is set to "AUTO" (see previous page), the unit must be in the E-E mode.
This section describes how to prevent inadvertent operations during recording, and how to carry out the actual recording. The recording procedure depends on whether or not the CAMERA connector was selected in the procedure described in the section "Selecting the input video signal" (page 4-3).
4-2 Procedures for Recording Recording the input signals from the VIDEO IN connector or SDI IN connector 1 Switch the POWER switch on, and load a cassette. 2 Hold down the REC button, and press the PLAY button. Recording starts, except that if there is no video signal input to the VIDEO IN connector or SDI IN connector recording does not start. 3 To end recording, press the STOP button. Pausing recording Press the PAUSE button. To restart recording, press the PAUSE button once more.
Connections and settings for audio dubbing In the Digital Betacam format, in addition to the digital audio channels recorded on the diagonal tracks, there is also a longitudinal track, referred to as the cue track, which can record a single analog audio channel. The cue track can be used when adding an audio channel to an already recorded tape. Connect the microphone or other audio source to the AUDIO IN connectors. In audio dubbing, the input to channel 4 is recorded on the cue track.
4-2 Procedures for Recording Audio dubbing Audio dubbing on the cue track 1 Switch the POWER switch on, and load a cassette. 2 Adjust the recording level of the audio source to be recorded on the cue track. For details, see the section "Adjusting the recording levels " (page 4-5). 3 Press the PLAY button to play back the tape, then press the PAUSE button at the point from which you wish to dub the audio. This pauses the tape transport. 4 Press the CUE DUB button. The indicator lights.
Use the MONITOR SELECT switches to select the audio signals output from the EARPHONE jack and HEADPHONES jack during playback. When the CH3/4 OUT switch is in the MON position, these switches also select the audio output from channels 3 and 4 of the AUDIO OUT connectors. Selecting the outputs from channels 3 and 4 of the AUDIO OUT connectors Set the CH-3/4 OUT switch as follows: to select the outputs from channels 3 and 4 of the AUDIO OUT connectors.
5-1 Preparations for Playback An FPU (Field Pickup Unit) allows the playback signal from this unit to be radioed back to a broadcasting station. MODE switch The MODE switch must be in the PB/EE position. Audio signals Audio signals from the DVW-250/250P to the FPU are output through channels 3 and 4 of the AUDIO OUT connectors. Connections and settings The following figure illustrates example connections for transmitting the playback signals by means of an FPU.
Playback at normal speed 1 Switch the POWER switch on, and load a cassette. 2 Press the PLAY button. Video and audio playback starts. 3 Turn the AUDIO PB LEVEL control knobs to adjust the audio playback levels. High speed searching 1 Press the SEARCH button. 4 To end playback, press the STOP button. Pausing playback Press the PAUSE button. The PAUSE indicator flashes, and a color still picture appears on the video monitor. To restart playback, press the PAUSE button once more.
5-2 Procedures for Playback 4 To end the search operation, press the STOP button. Automatic ending of the search operation If the tape transport is not operated for eight minutes after pressing the SEARCH button, the search operation is automatically ended to protect the tape.
During playback, the internal time code reader reads the time code and user bits recorded on the tape. You can display the time code values read in the status indication panel.
The initial setup menu (referred to as the top menu) gives access to seven submenus. Each of these is used to display and change the settings of various items. In some cases there are also further nested submenus. The following diagram shows the tree structure of the menus. Items enclosed in angle brackets are submenus.
Making setup menu settings Example:
Setup menu settings Top menu item Submenu items (nested submenus in angle brackets)
Setup menu settings (Continued) Top menu item Submenu items (nested submenus in angle brackets)
Setup menu settings (Continued) Top menu item Submenu items {nested submenus in angle brackets) LOAD SAVE EXIT Function Setting values 0: factory default setup data. 1: setup data from bank 1. 2: setup data from bank 2. 3: setup data from bank 3. Select a bank number, then press 1: save in bank 1. the SET button to save the 2: save in bank 2. current setup data in a memory 3: save in bank 3. bank. — Return to menu.
The following figure shows connections for using the DVW-250/250P as player and a DVW-A500/500/ A500P/500P Digital Videocassette Recorder as recorder.
Example 1 The following figure shows connections for using the DVW-250/250P as player, a DVW-A500/500/A500P/ 500P Digital Videocassette Recorder as recorder, and a BVE-series editing control unit.
Example 2 The following figure shows connections for using two DVW-250/250P units as recorder and player, with a BVE-series editing control unit. If you use a DVW-250/250P as recorder, only assemble editing is possible.
If a fault occurs during operation, a warning is given by an indication in the status indication panel, and the WARNING indicator lights or flashes. If you are monitoring the audio with headphones or an earphone, there is also an audible warning tone. If a warning is given, use the following table to determine the appropriate measures to be taken.
Fitting the shoulder strap Fitting the optional carrying case (BKDW-250) 1 Remove the carrying case from its packing, and insert the cushioning material to give the case its shape. 2 Insert the DVW-250/250P in the carrying case. 3 Do up the side fasteners, and fasten with the buckle. Fitting the optional carrying case Adjusting the length of the shoulder strap In the following environments, if the unit is operated continuously in the carrying case it may become hot.
General Video characteristics Power requirements 12 V DC+5.0 V/-1.0V Power consumption Approx. 28 W (with CONFI switch at OFF, SDI OUT setting at OFF) 39 W maximum Operating temperature 0 °C to 40 °C (32°Fto 104°F) Storage temperature -20 °C to +60 °C (-4°Fto 140°F) Operating relative humidity 25 %to85 % Mass Unit alone: approx. 6.6 kg (141b8oz) With battery pack and small cassette: approx. 7.
Specifications Audio system Sampling frequency 48 kHz (video sync) Quantization 20 bits/sample Input A/D quantization 20 bits/sample Output D/A quantization 18 bits/sample Frequency response 20 Hz to 20 kHz +0.5 dB/ -1.0 dB (reference level) Dynamic range 95 dB minimum (1 kHz, emphasis on) Distortion 0.04% or less (1 kHz.
DC OUT (miniature 4-pin xl) Power supply to BVR-3 Remote Controller RFU DC OUT, VIDEO OUT, AUDIO OUT Interface for RF modulator Processor adjustment ranges Video input and output adjustment ranges System sync phase ±3dB ±2 us Supplied accessories Shoulder strap (1) Operation Manual (1) Maintenance Manual Part 1 ( 1 ) Recommended equipment BKDW-250 Carrying Case DVW-A500/500/A500P/500P Digital Videocassette Recorder BP-90A and BP-L60 Battery Packs BC-L 100/L 1 OOCE and BC-410/41 OCE Battery Chargers AC-550
A AC power supply 3-3 AC-550/550CE AC Adaptor 3-3 Adjustment controls 2-6 ADVANCE button 2-9 Analog equipment connecting 4-2 system configuration 1-2 Audio adjusting the recording levels 4-5 dubbing on the cue track 4-15 input settings 4-5 level meters 4-6 recording 4-13 6-4 Audio connectors and controls 2-11 AUDIO IN connectors 2-12 Audio input level switches 2-12 AUDIO OUT connectors 2-12 AUDIO PB LEVEL control knobs 2-7 AUTOTR 6-5 B 6-5 Battery capacity remaining indication 2-5 Battery pa
Index R T w Reading and displaying time code and user bits 5-5 REAL TIME insertion time code selection switch 2-9 REAL TIME record/set switch 2-9 REC button and indicator 2-2 RECRUN 6-4 Recording LTC 4-10 monitoring mode for recording 4-7 preparations 4-1 procedures 4-13 tape recordi ng format 1 -1 time code and user bits 4-9 Recording level control knobs and UNI/ VAR switches 2-6 Remaining battery capacity, checking 3-4 Remaining tape, checking 3-7 REMOTE connector 2-15 RESET button 2-5 REW button and i
