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Sound Devices 774T, Руководство пользователя и техническая информация

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69

the 744T supports additional sampling rate / bit depth combinations, however, only the most com-
mon are included below. 

Record Time 

The chart shows that when recording 24-bit/48 kHz audio to a 40 GB hard drive the maximum 
amount of recording time available roughly 80 track-hours. If recording a stereo two-track fi le, this 
yields 40 stereo hours of record time. 

Note that most storage media now quote capacity in GB using SI units, where 1000 megabytes equals one 
gigabyte. 

PCM Audio 

Uncompressed digital audio is expressed numerically by two measurements, bit depth and sampling 
frequency, such as 16-bit/48 kHz. These two numbers are used to compute the data rate of uncom-
pressed audio. 

Audio Data Rate = Bit Depth x Sampling Frequency 

In the example below the data rate of a single 16-bit/48 kHz audio stream is computed in megabytes 
per minute. Division by 1,048,576 converts from bits to megabits. Division by 8 converts from mega-
bits to megabytes; multiply by 60 converts seconds to minutes. 

  (((16 x 48000) / 1,048,576) / 8) x 60 = 5.49 MB/min 

MP3 Compressed Record Time in Hours 

MP3 Data Rate

 (bit depth/sampling rate), stereo track 

64 kb/s

 

(0.47 MB/min)

96 kb/s

 

(0.70 MB/min)

128 kb/s

 

(0.94 MB/min)

160 kb/s

 

(1.17 MB/min)

192 kb/s

 

(1.40 MB/min)

 

256 kb/s

 

(1.86 MB/min)

 

320 kb/s

 

(2.34 MB/min)

 

Stora

g

e

 in GB

 

(1000 MB = 1 GB)

 

1

35 23 17  14  11 

8 

7 

2

71 47 35  28  23 

17 

14 

4

142 94 71  56  47 

35 

28 

8

284 189 142  113  94 

71 

56 

15

533 355 266  213  177 

133 

106 

40

1422 948 711  568  474 

355 

284 

60

2133

1422

1066

853

711

533

426

100

3555

2370

1777

1422

1185

888

711

The chart above shows recording time available with the 744T when recording to an MP3 fi le. Time 
is expressed in hours at the specifi ed MP3 supported by the 744T. Note that all recordings are two-
channel recordings. 

Compressed Audio 

When digital audio is compressed using some form of lossy, perceptual process such as MPEG2-
Layer3 (MP3 audio), Windows Media encoding (WMA), ATRAC encoding (used in MiniDisc), AAC 
(MPEG-4 audio), or others - it can have a signifi cant reduction in its data rate. Compressed audio has 
enabled the practical distribution of audio over low speed data networks. 

Содержание 774T

Страница 1: ... Audio Recorder with Time Code User Guide and Technical Information firmware rev 2 09 Sound Devices LLC 300 Wengel Drive Reedsburg WI USA 1 608 524 0625 fax 1 608 524 0655 Toll Free 800 505 0625 www sounddevices com 1 8 HDD 2 5 HDD ...

Страница 2: ...backside front cover ...

Страница 3: ... Time Code 29 Frame Rate 48048 F Sampling Rate Mode Time Code Modes Jam Menu User Bits NTSC Standard Def Video Production Recording 34 Recording Pre Record Buffer Failure During Recording Display Options Playback 35 AutoPlay Audio File Formats 36 WAV iXML MP3 Files File Naming Numbering 37 Scene Name Numbering Mono Track Name Designators Duplicate File Names File Management 39 Folder Actions File ...

Страница 4: ... Devices took advantage of the best in professional and consumer electronics technologies to bring incredible feature depth with ease of use Hard drive and Compact Flash are highly reliable industry standard and easily obtainable With the ability to write to an external drive a low cost portable medium can be turned in to post production The removable rechargeable battery is a standard Sony compat...

Страница 5: ...r recording routing and control parameters The single layer menu structure allows for very quick navigation and selection of functions To enter the setup menu press the front panel key Once in the setup menu the following conventions are shared for navigating among selections and to select specific parameters enters setup menu ITEM highlighted menu item selects highlighted item or parameter moves ...

Страница 6: ...pth and sampling rate are displayed on the LCD panel 1 Select the bit depth as needed 2 Set the sampling rate as needed 3 Select the file format for recorded files 4 Select the storage medium s Internal hard drive Compact Flash External drive or combinations of drives for recording Time Code Setup When using a time code workflow proper time code setup is essential for accuracy Skip this section if...

Страница 7: ...lume Use the appropriate FireWire cable 6 pin to 4 pin or 6 pin to 6 pin for interconnection Files on the 744T can be treated as if they are local files including renaming files copying deleting and playing directly from the 744T hard drive In general it is good practice to copy audio files from the 744T to a computer before any processing is performed on the files To connect the 744T for FireWire...

Страница 8: ... jam menu 5 LCD Display Primary display of 744T status The LCD is backlit using the LCD backlight control 15 6 Tone Oscillator Tone frequency tone level and routing are controlled in the setup menu Press and hold to activate the tone oscillator 7 Input to Track Matrix LEDs Blue LEDs indicate inputs 1 2 3 4 enabled for recording to tracks A B C D A solid blue LED indicates an input is routed to a t...

Страница 9: ...ns as the cancel key 16 Fast Forward Key Performs fast forward FF scrubbing through the played file when pressed in playback and play pause mode Play pause indicated by flashing A time on LCD Fast forward rate increases the lon ger the key is held In play stop mode indicated by flashing filename on LCD selects the next file in the record folder either daily folder or main folder 17 Play Key Plays ...

Страница 10: ... Input Limiter LEDs Illuminates orange when limiting is oc curring on the microphone input If con stantly lit the microphone input is being hit with too hot of a signal Reduce the input sensitivity until limiting occurs infrequently 28 Input Signal Presence LEDs Indicates presence of analog or digital signal and its relative level on each of the four inputs 29 Input Peak Overload LED Indicates ana...

Страница 11: ...ws the file bit depth 6 Sample Rate Indicator Shows the set record sampling rate In playback shows the file sampling rate 7 Time Code Rate Shows the set time code frame rate If a file has time code information embed ded the playback frame rate is indi cated If external time code is connected and the external rate differs from the rate set internally the time code rate will flash 8 Headphone Source...

Страница 12: ...e dia is selected for record Highlighted media descriptor indicates media selected for record monitoring playback or file directory display 13 Input 1 2 Level When input 1 or 2 gain is turned this indicates the gain level in dB for inputs 1 and 2 Normal mic input gain range is from 26 dB to 70 dB low gain mic range is from 10 dB to 50 dB line input range is from 6 dB to 18 dB Locked will be displa...

Страница 13: ...ctive balanced line level input connec tors Pin 1 ground pin 2 pin 3 5 TA3 Master L R Analog Outputs Active balanced line level analog L R outputs for the Master Output Bus Pro gram source and attenuation level are user selectable Pin 1 ground pin 2 pin 3 6 Headphone Output 3 5 mm TRS stereo headphone connec tor Can drive headphones from 8 to 1000 ohm impedances to very high lev els Tip left ring ...

Страница 14: ...8 volts DC for unit powering and removable Li ion battery charging The Hirose 4 pin con nector is wired pin 1 negative pin 4 positive Pin 2 and pin 3 are used to charge the removable Li ion battery DC ground at both pins 2 and 3 is at the same potential as chassis and signal ground 6 Word Clock Input and Out Provides clock input and output for the 744T Word input accepts sampling rates between 32 ...

Страница 15: ...atible computer lock 2 Compact Flash Slot Accepts Compact Flash medium with the label side up Compatible with Type I Type II and MicroDrives 3 Battery Mount Accepts Sony InfoLithium L or M Series batteries Also accepts batteries conforming to this mount Numerous capacities from 1500 mAh to 7000 mAh are available Back Panel Descriptions 1 3 2 ...

Страница 16: ... disabled power save This option shuts down all circuitry associ ated with an input pair to reduce power draw and extend battery runtime When an input pair is disabled the digital input LEDs associated with the pair will slowly flash In playback only applica tions both input pairs can be shut down to maximize power efficiency and battery runtime Analog Inputs 1 and 2 Analog inputs 1 and 2 on XLR c...

Страница 17: ...nation of analog and digital filters to re duce sensitivity to low frequency signals When the high pass is engaged on an input its front panel LED illuminates to indicate it is active The first pole of the high pass circuit is an analog filter at 40 Hz 6 dB per octave and is part of the microphone preamplifier circuit Additional poles of high pass filtering are done in DSP Several frequency and sl...

Страница 18: ...s Digital inputs are in pairs AES3 signals on XLR 1 appear at inputs 1 and 2 AES3 signals input to XLR 2 appear at in puts 3 and 4 To use the AES3 inputs the input mode select switch must be set to AES EBU The front panel digital input LEDs will illuminate when digital input is selected for the in dicated track s If the LED is flashing digital input is selected but a no valid digital clock is rece...

Страница 19: ... Delay is not set until the Rotary Switch is pressed or or the check mark is selected The amount of delay avail able is dependent on the sampling frequency in use Sample Frequency Maximum Amount of Delay Available per input 32 44 1 48 48 048 kHz 30 000 µS 88 2 96 96 096 kHz 15 000 µS 176 4 192 kHz 7 500 µS Input delay can be useful for time aligning input signals from differing sources For example...

Страница 20: ...a tions 4 When a chosen pairing is highlighted press either the ASSIGN soft key or the Rotary Switch to assign the combination Assigned tracks are noted on the screen by the addition of an arrow pointing to the record track The LED routing matrix will also show a flashing blue LED for the currently selected input to track combination 5 Once a track is assigned move to the next input to track combi...

Страница 21: ...e rate closest to an internally generated frequency Sampling Frequency Available Audio Bandwidth The sampling frequency is expressed in samples per second in hertz and defines the number of times in a second that the analog audio signal has been measured Sampling frequency determines the audio bandwidth or frequency response that can be represented by the digital signal A quick estimate of the max...

Страница 22: ...cept and lock to external clock sources for recording The 744T disregards external clock both AES and word clock during playback Clock Master When sending digital audio to several devices one unit is designated as the word clock master and the others as slaves Generally the device with the analog to digital converter is designated as the word clock master The 744T can function as an A D converter ...

Страница 23: ... bit depth file format and time code frame rate if used This will ensure that all files generated are compatible 3 If time code is being used set slave units to External time code mode so that they will follow the master recorder s time code generator 4 Set scene names on each of the units for easy identification in post production Take numbers should be set to the same on all linked recorders if ...

Страница 24: ...Track A Track B Track C Track D Input 1 2 Input 3 4 Input 1 3 Input 2 4 Input 1 2 3 Input 2 3 4 Input 1 2 3 4 Multiple inputs are summed with these selections Track A B Track C D Track A C Track B D Track A B C Track B C D Track A B C D Multiple track assignments are summed with these selections Master Output Bus Audio signals routed to the Master Output Bus are sent to three output connections an...

Страница 25: ...extremely high sound pressure levels Hearing experts advise against exposure to high sound pressure levels for extended periods Selecting Headphone Sources The headphone source display on the main LCD screen shows the audio sources sent to headphones The 744T comes from the factory with several preset headphone audio source selections available on the Rotary Switch These selections include inputs ...

Страница 26: ... of the headphones When not in playback headphones have no program Inputs 1 2 MS Inputs 3 4 MS Stereo monitoring of discrete M mid and S side input pairs Highlighted media is source of monitor program Tracks A B MS Tracks C D MS Stereo monitoring of discrete M mid and S side track pairs Highlighted media is source of monitor program Upon playback will function as MS track monitor Monitor A B MS Mo...

Страница 27: ...undField surround microphones The 744T can accept the four signals output from a SoundField microphone and record each to its own track When recording four channel B format audio the 744T headphone monitor can decode the B format signal into L R stereo The 744T contructs a stereo signal using the W X and Y signals of the B for mat The Z axis signal is not used Similar to the 744T s MS stereo monit...

Страница 28: ...ayback All headphone moni tor combinations are available for the Headphone Playback Mode as well as No Change which makes no change to the headphone selection during playback Headphone Playback Mode is select ed in the setup menu Headphone Warning Tones The 744T can generate an audible beep or warning bell in the headphones when an error has occurred The specific error will be reported on the LCD ...

Страница 29: ...useless for tracking to the 744T In VU mode the front panel meter labeling is in volume units Peak Peak reading ballistics correspond to actual signal maximums but don t necessarily correspond to perceived signal loudness A peak meter has a near instantaneous attack to display maximum signal amplitude and a slow decay to allow the user to see them Peak metering is essential for digital re cording ...

Страница 30: ... a range of 40 to 0 dBFS Reference tone frequency is adjustable from 100 to 10 000 Hz Standard tone levels vary according to the practices and needs of production and post production but are generally in the 20 to 12 dBFS range The tone oscillator is activated by pressing the front panel key Tone will active only while the tone key is pressed Tone is routed where specified in the setup menu Routin...

Страница 31: ... using its internal re chargeable AA NiMH time code cell After two hours without power the 744T reverts to a less pre cise time of day crystal to maintain the date time of the unit This time code battery is charged from internal or external power whenever the 744T is powered up If the time of day clock is reset during the production day or if the time code mode is changed from 24 hour run to anoth...

Страница 32: ... such as Avid or Final Cut Pro Since the file is stamped as a 48 kHz file the edit system will play it back at 48 kHz and not at 48 048 kHz This audio pull down will match the transfered picture without the need for an intermediate step through other software to create the pull down The time code frame rate actual recording rate is forced to 30 ND in 48 048 F mode The front panel of the unit will ...

Страница 33: ...he internal generator continues to run to preserve continu ous time code Useful for time code transmission over RF where RF hits may interrupt time code Ext TC Auto Record The internal time code generator follows the external time code signal appearing at the time code input When external code advances the 744T enters record mode automatically When the external code is stopped the 744T generator p...

Страница 34: ...n the JAM RX TC menu item is highlighted in the jam menu the external time code user bits and frame rate are shown at the top of the LCD screen the 744T internal generator user bits and frame rate are shown at the bottom of the screen To jam the 744T from an external value press soft key next to the jam button or the Rotary Switch button The screen will display JAMMING Once the 744T is jammed to t...

Страница 35: ...es Commonly user bits carry information such as the date take sound roll or camera roll number User bits are edited from the EDITU BIT selection in the jam menu Press enter tone key or the Rotary Switch to enter user bit edit mode The screen will show the format and setting of the user bits Using the Rotary Switch or the soft button up and down arrows user bit digits can be edited in pairs Once DO...

Страница 36: ...e 744T is its record key Recording takes priority over all activity except for disk formatting disk speed tests and file transfers The 744T will immediately enter record mode whenever the record key is pressed When recording the adjacent red LED will illuminate to indicate that the unit is in record mode If no inputs are routed to tracks recording cannot take place Make certain that at least one r...

Страница 37: ...ay If time code is turned off A time is shown as large numbers even with BIG TIME CODE set For additional visual indication that recording is in process the large display can menu selected for white numbers on black number reversed or the display can be set to flash during recording reversed numbers indicating that recording is in process Playback The 744T has high resolution playback circuitry an...

Страница 38: ... files with the BWF extension WAV The 744T writes AES 31 BWF formatted files The audio files created by the 744T place additional information in the file header called the Broadcast Audio Extension data chunk Software that does not recognize this additional broadcast wave data chunk will simply ignore this added information Among the values recorded are time code stamp time code frame rate date an...

Страница 39: ...number of scene names The advantage of scene name lists is that scene names can be built before production so that Scene names are made with alphanumeric characters including _ and and can be any length between zero 0 and nine 9 characters in length Scene numbers are helpful to match audio with the corresponding scene in a production Scene names can also be used to identify other items in cluding ...

Страница 40: ...ft to right and deleted from right to left 3 The Rotary Switch or the soft keys are used to choose characters numbers Press the Controller or hit the soft check key to save the character and move to the next position From the user menu the action for take resetting is controlled from the following options Never take numbers do not reset When scene is changed take resets when scene name is changed ...

Страница 41: ...Y a new folder will be created daily When recording past mid night the 744T will prompt to make to a new daily folder Bottom Level Scene Folders can be selected as a SCENE folder which will use the name generated from REC SCENE NAME NUMBER Setup Menu as a user selected name or not used at all If no upper level folder is in use the BOTTOM LEVEL folder will reside at drive s root If the MID LEVEL an...

Страница 42: ... and files from Compact Flash take added time to show details this is normal File Viewer Screen The file viewer screen contains information about the individual audio files contained in the direc tory The left side of the display shows files and folders The top line displays the directory path in the form of DRIVE FOLDER NAME File names are listed in the order they were recorded File types not rec...

Страница 43: ... hard drive and CF appear as external FAT32 volumes Windows XP has a limitation on FAT32 drive formatting XP can format a FAT32 volume to a maximum of 32 GB however it can read FAT32 volumes as large as 2 TB FAT32 has a maximum individual file size limitation of 4 GB While it is possible to have thousands of files on the 744T storage medium s the largest any single file may be is 4 GB The 744T aut...

Страница 44: ...d and prompt to continue Pressing the soft key to Enter or the Rotary Switch begins the copy process The LCD will report the progress of the copying operation When file copying is completed the 744T will report the number of files successfully copied Error Conditions If a file is to large for the destination storage medium the 744T will prompt to skip it or cancel copy ing If an error occurs durin...

Страница 45: ... see below can be permanently de leted from the recorder Each drive has its own Trash and False Take folders and they are permantly deleted independently Once the trash and False Take folders have been emptied any files or folders they contain are permanently deleted and cannot be recovered Take Number Incrementing To advance to a higher take number hold the STOP button and press FastForward The f...

Страница 46: ... reliability noise performance and current draw Formatting The drive installed in the 744T is formatted at the factory as a single partition FAT32 volume If a drive with multiple partitions is installed the 744T will only see and address the primary partion For best operation periodic re formatting of the 744T hard drive is recommended Formatting the hard drive rebuilds the FAT file allocation tab...

Страница 47: ... corrupted in such a way the media repair utility is unable to con tinue In this case the operation will abort and the user is prompted to check the hardware and try again Drive Type The 744T ships with a 2 5 inch ATA 5 interface 5400 RPM hard drive Sound Devices has chosen the specific mechanism for maximum vibration and shock resistance Most 2 5 inch drives conforming to the ATA specification ca...

Страница 48: ...sitioned over and dam age the ability of the head to read and write data to the hard disk drive All devices with hard drives are subject to damage from operating and non operating shock The mechanical construction of the 744T is designed to minimize the transmission of shock to the hard drive The drive is isolated from the chassis using special shock reducing closed cell foam This material increas...

Страница 49: ... CF menu selection for the hard drive The 744T can format and use Compact Flash cards with capacities of 64 MB and greater Formatting the CF rebuilds the FAT file allocation table and erases all audio and data files present on the card While some PC and Mac utilities can recover files immediately after formatting a CF card consider that the files have been permanently erased FAT32 volumes generate...

Страница 50: ...ously the abilility to write to an external drive reduces the need for post record copying of sound files External hard drive is attached and is selected as the recording destination External FireWire drives require 2 0 ready 744T hardware Only recorders specifically labeled 2 0 ready are able to connect to external FireWire drives as an available storage medium When to Use External FireWire Drive...

Страница 51: ...s with the recorder turned off Qualified Drives External FireWire storage volumes that can be formatted and addressed as FAT32 can be used with the 744T These include external hard drives bus powered or mains powered Drives as large as 2 TB can be addressed FireWire Compact Flash card readers DVD RAM drives FireWire drives use a variety of chipsets to perform conversion from the drive s native form...

Страница 52: ...sted in Specifications 3 The 744T will now show COMPUTERCONNECTION on the LCD When connected all audio function ality of the 744T is defeated 4 Navigate the drives on the computer and copy all needed audio to local storage To avoid possible directory corruption on the 744T hard drive always properly dismount the unit from the operating system On Mac platforms drag the drive icons to the trash On W...

Страница 53: ...r approximately four hours from the included 4800 mAh Li ion battery Lithium Ion Rechargeable Battery The 744T is compatible with Sony mount L or M type Li ion rechargeable batteries Numerous pow er capacities are available in these battery types ranging from 1000 mAh to 7000 mAh The 744T s mount accommodates unlimited battery depth Larger amp hour cells provide more run time When powered by the r...

Страница 54: ...ition and supplies charg ing current if necessary When charging the amber charge LED will flash Once the battery is fully charged the charger will turn off and the amber charge LED will light solid indicating a full charge Large capacity cells increase the charge time Charge LED Activity Description of Activity Off Charger disabled On Completed charge battery fully charged 1 blink Charger enabled ...

Страница 55: ...nal routing signal processing LED s button and switches and data ports Version Information During manufacturing the unit s hardware revision number and serial number are burned into a protected area of the EEPROM and are not changeable These numbers can be viewed from the INFO VERSION selection of the setup menu INFO VERSION also shows the firmware version of the recorder The 744T firmware version...

Страница 56: ...lt In Presets The 744T is shipped from the factory with the factory preset applied Its settings are listed below Three additional presets film reporter and music presets allow for quick setup of typical param eters for the defined application Presets are applied by entering the setup menu and selecting the preset All previous settings are lost when a preset is applied 744T Presets Factory Pre set ...

Страница 57: ... dB 0 0 dB Line Input 4 Gain 0 0 dB 0 0 dB 0 0 dB 0 0 dB Input 1 Delay 0 usec 0 usec 0 usec 0 usec Input 2 Delay 0 usec 0 usec 0 usec 0 usec Input 3 Delay 0 usec 0 usec 0 usec 0 usec Input 4 Delay 0 usec 0 usec 0 usec 0 usec File Marker Mode New File New File New File New File File Max Size 2G CF 1 8 GB 2G CF 1 8 GB 2G CF 1 8 GB 2G CF 1 8 GB File Folder Options None None None None File Copy Files ...

Страница 58: ...rash Empty Trash CF Empty Trash Empty Trash Empty Trash Empty Trash Empty Trash EXHDD Empty Trash Empty Trash Empty Trash Empty Trash Empty Trash Power Ext Low Batt Volt 11 0 volts 11 0 volts 11 0 volts 11 0 volts Power Ext Power Function Do Nothing Do Nothing Do Nothing Do Nothing Ext Keyboard Assign F1 Record F2 Stop Button F3 Rewind Button F4 Play Button F5 Fast Forward Button CTRL C File Copy ...

Страница 59: ...reWire Connection Activates FireWire drive mode Computer Connect STOP HDD buttons External Drive 3 Rec Sample Rate Sets the audio sampling frequency of the 744T 32 kHz 44 1 kHz 48 kHz 48 048 kHz 48 048k F 88 2 kHz 96 kHz 96 096 kHz 96 096 k F 176 4 kHz 192 kHz 4 Rec Bit Depth Sets the bit depth of the 744T recordings 16 bit 24 bit 5 Rec File Type Selects the file format type recorded to the select...

Страница 60: ...ow the large display looks when the unit enters record Normal Numbers Reverse Numbers Flash Numbers 17 Input Routing Allows the user to setup their routing matrix among all available inputs and tracks There are preset routings and three custom routings available Pressing the input select key repeat edly will cycle through all preset routings Primarily accessible from the Input Select Key 1 A 2 B 1...

Страница 61: ...markers will be set within one contiguous file New File A new file is started with each press of the record key the take counter is increased by one 40 File Max Size Selects the file size where the 744T will close then start a new file The 744T will not record a file larger than the selected size The largest file permissible with the 744T s FAT32 file system is 4 GiB 4 GB 2 GB 1 GB 640 MB 3 6 GB 1...

Страница 62: ...ly set from the jam value item in the jam menu Time code generation runs only during recording generating continuous time code from file to file 24 Hr Run time code is initialized from the system clock on startup and enters free run mode Time code is updated if the time of day clock is adjusted Ext TC applies external time code to the recorder directly The internal time code generator has no effec...

Страница 63: ...40 dBFS 54 55 Output 2 Left Source Output 2 Right Source Selects the signal source for output bus 2 sent to digital output bus 2 Input 1 Input 2 Input 3 Input 4 Track A Track B Track C Track D Input 1 2 Input 3 4 Input 1 3 Input 2 4 Input 1 2 3 Input 2 3 4 Input 1 2 3 4 Track A B Track C D Track A C Track B D Track A B C Track B C D Track A B C D 56 Output 2 L R Attenuation Selects the attenuation...

Страница 64: ...ment and Favorite Mode below for list of headphone selections 68 HP Favorite Mode Selects the audio source monitored when the Rotary Switch is pressed during recording or playback Inputs 1 2 Inputs 3 4 Tracks A B Tracks C D Monitor A B Monitor C D Input 1 1 Input 2 2 Input 3 3 Input 4 4 Track A A Track B B Track C C Track D D Monitor A A Monitor B B Monitor C C Monitor D D Inputs 1 2 MS Inputs 3 4...

Страница 65: ...tted drives once formatted old audio data is not accessible by the 744T 83 CF Repair Runs a utility that will repair minor errors in the directory structure of the Compact Flash 84 CF Empty Trash Allows user to delete files previously sent to the trash as well as false takes Empty Trash Empty False Takes Empty both 85 EXHDD Test Performs a speed test on the external media attached Data transfer sp...

Страница 66: ...rd Language Select the language of the keyboard attached to the CL 1 English German French 95 CL 1 Re program The CL 1 has its own firmware which is sup plied from the 744T This utility updates the CL 1 firmware 96 CL 1 Logic Out Assign Each logic output pin can be assigned to go high when the unit is in the selected mode Logic input overrides logic output selection Undefined Stop Play Pause Recor...

Страница 67: ... dBu input Line 0 004 max 1 kHz 22 Hz 22 kHz BW gain control down 16 dBu input Gain input dBu to 20 dBFS Mic normal gain mode 25 70 dB Mic low gain mode 10 55 dB Line 6 18 dB 0 1 dB increments Input Impedance Mic XLR 7 5k ohm Line XLR and TA3 20k ohm Input Clipping Level Mic input 5 dBu minimum normal gain mode gain control fully down Mic input 10 dBu minimum low gain mode gain control fully down ...

Страница 68: ...acy 0 2 ppm when tuned with Ambient Master Controller holds TC clock for 8 hours after main bat tery removal AA time code battery installed after 8 hours retains time of day Input Output 20k ohm impedance 0 3V p p 8 dBu minimum 1k ohm impedance 3 0V p p 12 dBu Powering Internal Voltages 16 VDC regulated audio rails 5 VDC data 3 3 VDC data 1 5 VDC DSP core 48 VDC phantom power Power supply batterie...

Страница 69: ...an unbalanced consumer electronic level 3 5 mm Headphone tip signal L ring signal R sleeve signal ground mates with 3 5 mm TRS jack 5 pin LEMO Time code 1 ground 2 SMPTE TC In 3 ASCII in out 4 tuning out 5 SMPTE TC out LEMO B series connector pin assignments as viewed on panel mounted connector AES3id S PDIF Inputs center pin signal sleeve ground BNC female unbalanced coaxial connection 75 ohm con...

Страница 70: ...rawn from the phantom supply Battery Chargers Depending on the charge state of the on board Li ion and the internal AA time code battery the charging circuit can draw 10 W from external DC Sampling Rate The 744T draws more power at higher sampling rates Each doubling of the sampling rate adds 1 W of power consumption Recording Time Calculation The calculation of available 744T recording time invol...

Страница 71: ... multiply by 60 converts seconds to minutes 16 x 48000 1 048 576 8 x 60 5 49 MB min MP3 Compressed Record Time in Hours MP3 Data Rate bit depth sampling rate stereo track 64 kb s 0 47 MB min 96 kb s 0 70 MB min 128 kb s 0 94 MB min 160 kb s 1 17 MB min 192 kb s 1 40 MB min 256 kb s 1 86 MB min 320 kb s 2 34 MB min Storage in GB 1000 MB 1 GB 1 35 23 17 14 11 8 7 2 71 47 35 28 23 17 14 4 142 94 71 5...

Страница 72: ...uttons to mute inputs Input Routing Stop and Input Hold down STOP and press INPUT to cycle through input routing presets Last preset will open the input routing menu to the custom route selection Phantom 1 Tone and Menu Toggles input 1 phantom power Phantom 2 Tone and HDD Toggles input 2 phantom power Low cut 1 Backlight and Menu Toggles Input 1 high pass filter Low cut 2 Backlight and HDD Toggles...

Страница 73: ... available hardware accessory to interface computer keyboards and enable external devices to control the 744T When using the CL 1 front panel controls and menu selections on the 744T can be mapped to keyboard shortcuts allowing for full keyboard control of the recorder Additionally the CL 1 has electrical contacts that can be programmed as inputs or outputs A common use for the remote inputs is fo...

Страница 74: ...in File Viewer moves to the top of the list Insert in Setup Menu toggles markers 01 99 number sequence in Setup Menu jumps to menu list number Assignable Shortcuts Keyboard shortcuts can be programmed to control nearly every function on the 744T Shortcuts can select and change menu items with a simple key strokes Combinations of computer keyboard func tion keys along with Control Alt and Shift can...

Страница 75: ...s well from the Setup Menu The switch closure on a given pin of the CL 1 can be thought of as just another key on the keyboard Anything that can be assigned to a key can also be assigned to a switch To configure a pin as an input navigate to EXT KEYBOARD ASSIGN in the Setup Menu Select a new SHORTCUT number then locate the Login inputs amongst the assignable keys Choosing LOGIC IN 1 would correspo...

Страница 76: ...al disk or as a post record storage volume CS 3 Production bag with shoulder strap holds 744T and is compatible with PortaBrace RM acces sories mounts onto CS 442 CS 302 and CS4W mixer bags XL 1394 FireWire power filter to eliminate noise induced from bus powered FireWire drives into analog audio on the 744T XL 1A sold as pair TA3F to TA3F cable used to connect the direct outputs of the a Sound De...

Страница 77: ...ct the time code output to SMTPE time code inputs and outputs XL B2 removable rechargeable Li ion battery 4800 mAh battery it s good to have several spares XL WPH power adapter included with unit 100 240 VAC input 12 VDC output it s good to have a spare ...

Страница 78: ...orth above they may not apply in all cases For all service including warranty repair please contact Sound Devices for an RMA return mer chandise authorization before sending your unit in for repair Product returned without an RMA number may experience delays in repair When sending a unit for repair please do not include accesso ries including CF cards batteries power supplies carry cases cables or...

Страница 79: ...022 2003 Radiated and conducted emissions Class B EN61000 4 2 2001 IEC61000 4 2 2001 ESD 4 kV contact 8 kV air discharge EN61000 4 3 2001 IEC1000 4 3 2001 Radiated RF immunity 10 V m 80 1 kHz amplitude modulation EN61000 4 4 2001 IEC61000 4 4 2001 AC power ports EFT Burst I O lines 0 25 kV to 1 0 kV power line 0 5 kB 1 kV EN61000 4 4 2001 IEC61000 4 4 2001 EFT Burst I O lines 0 25 kV to 1 0 kV pow...

Страница 80: ...treat the SOFTWARE PRODUCT like any other copyrighted material except that you may make copies as only provided below You may not copy the printed materials accompanying the SOFTWARE PRODUCT Restrictions on use Licensee may not distribute copies of the SOFTWARE or accompanying materials to others Licensee may not modify adapt translate reverse engineer decompile disassemble or create derivative wo...

Страница 81: ...79 ...

Страница 82: ...702 rev 2 09 Printed in U S A ...

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