User Manual - Fast Forward Video
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1. Drop Frame Flag If certain numbers Bit 11 Color Frame Flag If color frame identification has been intentionally ap plied as defined in 3 2 1 a 1 shall be recorded Bit 27 Bi phase Mark Phase Correction This bit shall be put in a state so that every 80 bit word will contain an even number of logical zeros This requirement results in the following truth table for Bit 27 Number of logical Zeros in Bits to 63 27 exclusive Bit 27 Odd Even 0 BINARY GROUPS 4 5 7 Bits 43 and 59 Binary Group Flag Bits These two bits shall be sel in accordance with the truth table as specified in 3 4 Bit 58 Unassigned Address 0 until as signed by the SMPTE The bits shall be assigned as shown in Fig 3 and described below 0 3 Units of frames 4 7 First binary group B 9 Tens of frommes 10 Drop frame fag see 3 5 lI Color frame flary see 3 5 12 15 Secand binary group 16 19 Units of seconds 20 23 Thu rl binary group 24 26 Tens of seconds 27 Bi phase mark phase correction bit see 3 5 28 31 Fourth binary droup 32 35 Uns of minutes 36 39 Filth binary group 40 42 Tens of minutes 43 Binary group flag bit see 3 4 44 47 Sixth binary group 49 51 Units of hours 52 55 Seventh binary group 56 57 Tens of hours 58 Unassigned address bit 0 until assigned by the SMPTE 59 Binary group flag bit see 3 4 60 63 Eighth binary grovp 64 79 Synchronizing word 64 65 Fixed zero2. a video signal This display is known as a window Simply connect a video source to Video In on the F22 s rear panel and the window will be present on the signal at Video Out Positioning the Window Use the Arrow Keys to position the window anywhere on the screen Note that the Arrow Keys perform several functions they control window position only when Preset is NOT LIT and the indicator light is OFF If the indicator light is on the Arrow Keys will not position the window To turn off the indicator light press Read Gen Regen Jam Sync or Preset If one of these keys is lit press that one in order not to disturb the function in progress Changing the Window Characteristics Press the Window button to set the window s size and composition The Arrow Keys now change the appearance of the window To restore the Arrow Keys to their default function of moving the window you must press Read Gen Regen Jam Sync or Preset as described under Positioning the Window above Each press of the Window button selects the next of three possible formats Background Off Window Off and the default format characters with background The Up key varies the height of the window User Bits turns on and off the user bits portion of the window The F22 will display eight numeric user bits directly below the time code on the screen For more information on numeric user bits see User Bits under Preset INSTRUCTIONS FOR USE Adjusting Character and Ba
3. 6 Start the dub recorder in record mode PRESET Preset configures the F22 s generator The settings take effect in Gen Jam Sync and Regen Use Preset and the Arrow Keys to set a starting time code address and user bits Use Preset and the Drop button to select the time code format SMPTE drop frame or non drop frame See the explanationunder Indicators and Controls below You can set the hours minutes and seconds to any time code address from 00 00 00 00 to 3 59 59 00 The range of possible starting time code addresses is limited by SMPTE specification For example you could not set the F22 to 62 minutes or 78 seconds One common application of this feature is to set the hours digits to a different number for each tape in a program with multiple source tapes Indicators and Controls Preset To preset the F22 start by pressing Preset The indicator will light up and the indicators and controls will behave as described here Video Lock is inactive The indicator is off Arrow Keys The Left and Right buttons select a digit which will flash both on the front panel display and on the character inserter s video display The Up and Down buttons change the digit s value up or down Holding a button down has the same effect as repeated pressing INSTRUCTIONS FOR USE The Display shows either time code or user bits See User Bits below Drop Use this button to select drop frame or non drop frame SMPTE time code The Drop indicato
4. Bytes are sent LSB dirst Circuit 5 mA current loop type Logical Oas current ON One output shall drive one and only one input To avoid ground loops and subsequent data errors the transmitter circuitry and receiver circuitry are internally separated by an opto isolater a light emitting diode and a photo sensor which share a single sealed package The receiver must require less than 5 mA to turn on Rise and fall times should be less than 2 microseconds MIDI TIME CODE For device synchronization MIDI Time Code uses two basic types of messages described as Quarter Frame and Full There is also a third optional message for encoding SMPTE user bits Quarter Frame Messages 2 bytes Fl lt message gt F1 System Common status byte lt messape gt Onnn dddd nnn Message Type 0 Frame count L nibble 1 Frame count MS nibble 2 Seconds count L5 nibble 3 Seconds count MS nibble 4 Minutes count LS nibble 5 Minutes count MS nibble amp Hours count L5 nibble 7 Hours Count MS nibble and SMPTE Type dddd 4 bits of binary data for this Message Type Alter both the MS nibble and the LS nibble of the above counts are assembled their bit fields are assigned as follows FRAME COUNT xxx yyyyy XXX Undefined and reserved for future use Transmitter must set these bits to 0 and receiver should ignore YYYYY Frame count 0 29 APPENDICES SECONDS COUNT xx yvyYYYY xx Undefined and reserved for future use
5. minutes seconds Drop and Non drop frame User Bits e Preset from front panel e Decimal 8 digit FEATURES Window Dub e Display on off background on off e Variable sizes e Window dub user bits e Combined display user bits and time code simultaneously e BNC connectors MIDI Time Code e Converts SMPTE time code to MIDI e Standard 5 pin DIN output HOOK UP HOOK UP To record time code on a source tape to read time code and to record window dub copies F22 Rear Panel L Source Player jr ae ape Dub Recorder Recorders FRONT PANEL The following indicators and controls always behave as described here For explanations of the other indicators and controls see the Reader Generator Preset and Character Inserter sections of this guide mini Te ka 5 L e On Off switch we hope you can figure this one out The F22 will retain its presets and mode settings when the power is off Read Gen Preset Regen Jam Sync these buttons activate the indicated function See the appropriate heading under Instructions for Use for a full explanation MIDI TC switches the MIDI time code output on and off When the indicator lamp is on the F22 is generating MIDI time code Arrow Keys When Preset is off and the indicator light is off these buttons control the position of the time code window the video character inserter s display on the screen When you press Preset
6. same format as the source time code either drop frame or non drop frame See Preset 4 Press Jam Sync 5 Select your edit in point at least one second before the problem section 6 Preview the edit at least once to verify proper connections and levels 7 Perform the edit INSTRUCTIONS FOR USE REGENERATE Regeneration restores the time code signal to the proper shape and properly synchronizes the time code output to reference video The F22 s output time code is the same as the input time code the F22 automatically chooses the correct format for example drop or non drop frame SMPTE user bits are unchanged and discontinuities in the input are duplicated Regeneration is necessary because an audio channel s playback head is slightly offset from its record head which results in a phase shift of as much as half a field of video This phase shift would compound if you were simply to re record the time code NOTE Regeneration is NOT NECESSARY if you are using an address track Address tracks are designed for the demands of time code recording and playback and thus do not distort the time code signal s shape or cause a phase shift The Regenerate function is primarily useful when you wish to duplicate a tape that has time code recorded on an audio channel 1 Verify the connections according to Hook Up If you do not wish to record visible time code on the copy a window dub be sure to turn off the F22 s window See Character
7. when it leaves the factory If you find this level too high for your equipment use a small screwdriver to adjust it Turn counter clockwise to lower the output level Always TEST a new output level record a few minutes of time code then play the tape back and verify that the F22 as well as any other time code devices you have can read this code READER 1 Verify the connections according to Hook Up page 2 o 2 Press the F22 s Read button 3 Play your source tape The F22 will read and display time code forward and reverse from 1 30 play speed to about fifteen 15 times play speed subject to limitations in your recorder s playback circuitry See Character Inserter for more information about this feature while reading time code CONTROLS Indicators and Controls Read aste Video Lock is inactive when the F22 is reading time code The indicator will remain off The F22 does not output MIDI time code in Read The MIDITC indicator remains off and the MIDITC button has no effect Use Jam Sync or Regenerate to translate SMPTE from an existing track to MIDI Time Code Drop Indicator on when the F22 is reading Drop Frame SMPTE time code Pause freezes the current time code address on the front panel display Note that in Read Pause does not effect the Character Inserter This feature is provided so that you may make logging notes without disturbing a window dub in progress INSTRUCTIONS FOR USE GENERATOR T
8. 66 77 Fixed one 73 Fixed zero 79 Fixed one A s c ee N Le 7 bit 150 bl b2 b3 b4 oS bf br 0 A bit SQ al a2 a3 a4 05 96 of a ONE ISO CHARACTER i Fig 2 Use of Binary Groups to Describe 150 Characters Coded with 7 or 8 Bits A3 30 BITS PER FRAME 12 USER BINARY SPARE BITS 16 SYNC 3t ASSIGNED ADDRESS UNASSIGNED ADDRESS THE UNASSIGNED BIT IS LOGICAL ZERO UNTIL ASSIGNED rit yue Be RECORDED WAVEFORM mak Ye a yo a Vi BIT NO 0 12 20 24 28 32 48 52 60 64 68 72 76 79 10 ella wo 20 Fig 3 START CLOCK EDGE BETWEEN BIT 79 AND BIT 0 FRAMES UNITS lst BINARY GROUP FRAMES TENS DROP FRAME FLAG COLOR FRAME FLAG 2d BINARY GROUP SECONDS UNITS 34 BINARY GROUP SECONDS TENS BI PHASE MARK PHASE CORRECTION BIT 4th BINARY GROUP MINUTES UNITS Sth BINARY GROUP MINUTES TENS BINARY GROUP FLAG BIT 6th BINARY GROUP HOURS UNITS Tth BINARY GROUP HOURS TENS UNASSIGNED ADDRESS BIT 58 BINARY GROUP FLAG BIT Bth BINARY GROUP SYNC WORD Longitudinal Bit Assignment A4 B1 APPENDIX B MIDI TIME CODE SPECIFICATIONS MIDI PROTOCOL The hardware MIDI interface operates at 31 25 1 Kbaud asynchronous wath a start bit 8 data bits D0 to 17 and a stop bil This makes a total of 10 bits for a period of 320 microseconds per serial byte The start bit is a logical O current on and the stop bit is a logical current off
9. DI Time Code Out Industry standard 5 pin 180 degree circular DIN Window Display 4 character sizes Contrast adjusts for white characters on black background to black characters on white background Position fully adjustable from front panel Can display time code or time code and user bits together Front panel on off Power Requirements 110 120 Volts AC 50 60 hz Dimensions 19 W x 61 4 L X 1 34H Standard single unit rack size 14 RELATED INFORMATION LIMITED WARRANTY The F22 is unconditionally guaranteed for thirty 30 days from the date of purchase The unit may be returned to the place of purchase for a complete refund during this period provided that it is still in new condition and complete with manual and original packing material In addition Fast Forward warrants the F22 against defects in material or workmanship as follows For a period of one 1 year from date of purchase Fast Forward will repair or replace the defective item s at no charge at its facility in Irvine California Purchaser is responsible for all shipping charges to and from Irvine California After one 1 year repair becomes the responsibility of the purchaser The purchaser should retain his or her receipt as evidence of the date of purchase This warranty does not cover any damage due to accident misuse abuse or negligence This warranty is valid only in the United States Fast Forward shall not be liable for any incidental or consequen
10. F22 SMPTE Time Code Generator Reader Character Inserter User s Guide Fast Forward Video Inc 18200 B West McDurmott Irvine California U S A 92614 949 852 8404 Copyright 1990 Fast Forward Video Inc The design of the F22 is proprietary No part of the F22 manual may be copied without prior written consent of Fast Forward Video TABLE OF CONTENTS STT 1 POO Te 2 Controls Front Panelas cee vaste s n tror ae an 3 Reat Panelen epe e eaa sverre ne ones ann IR 4 5 Instructions for Use Reader orninn iciracencatee NN RETA SR aaaeeeaie 4 5 EAE KENO 5 2595425 2979247529597425 ae re Rd ie n es Er rs RA Ha PARA FA ARA 6 TO Post dub time code sss 6 To Prepare an edit master 6 7 Character Inserter cccccseseceseseeeeeneeessneeeesaees 7 To Record a Window DUD uu 8 S isens sne Heiskanen idk end 8 DANY NGS epa e erre irere boat aa e ES 9 To Replace Sections of Time Code 9 Regenerate seene 9 MIDI Time Code sss sese 10 Related Information Facts You Should Know sss eee eee eee 11 Trouble Shooting Time Code Systems 12 13 Technical Specifications m s sserreerssrrsorssrrennrnnr non 14 Limited Warranty memssssssssrerrsssrersrenerrrrenerrnrnnrr rn nanna 15 Appendices A ANSI SMPTE 12M 1986 B MIDI Time Code Specifications FEATURES SMPTE Longitudinal Time Code e Read forward and reverse 1 30 to over 10x play speed Generate with pause Jam Sync Regenerate Preset hours
11. Inserter for instructions 2 Press Regen 3 Play the source tape on the source recorder and record the duplicate on the dub recorder 4 See Facts You Should Know for additional information on setting the audio level correctly In Regen the F22 automatically determines the format of the input time code Thus this function is useful to see what kind of time code is on a tape Further a few seconds in Regen will automatically configure the F22 to generate read or jam sync time code in the same format either drop frame or non drop frame Indicators and Controls Regen Except as noted below all indicators and controls behave as described in Generator under Indicators and Controls Gen Video Lock is on when the F22 s time code output is successfully synchronized with the signal at Video in If the F22 is connected according to Hook Up Video Lock indicates that output time code is correctly re locked to the source tape s video Pause freezes the current time code address on the front panel Display In Regen Pause does not effect the time code at Time Code Out or the Pause Character Inserter This feature is provided so that you may make logging notes without disturbing a duplication in progress MIDI TIME CODE MIDI stands for Musical Instrument Digital Interface MIDI is a standardized protocol for communication among electronic musical instruments and their controllers The F22 can send time code directly to MIDI instrume
12. ONTROLS REAR PANEL TIME CODE 29 Carpet ou 1 amg Ures AG Power facket 290 Vois 1 Video Out when the F22 is on the character inserter s time code display is superimposed on the input video signal See Front Panel Display Preset Controls for details on setting the display s size position and composition When the F22 is off the input video signal bypasses the Impedance Switch and loops through to this output 2 Character Contrast Background Contrast these dials adjust the brightness of the F22 s video character display See Adjusting Character and Background Contrast under Instructions For Use Character Inserter on page 7 Impedance Switch sets the F22 s video input to high impedance gt 10K ohms or 75 ohm termination The switch only takes effect when the F22 s power switch is ON Video In the F22 uses this input for two purposes 1 as a sync reference for generated time code and 2 as the signal on which the character inserter superimposes its time code display MIDI Time Code Out the F22 outputs the MIDI Musical Instrument Digital Interface equivalent of the current SMPTE time code address when the Gen Jam Sync or Regen indicator is on Press the MIDI TC button on the front panel to turn this output on and off 6 Time Code In Out connect to the appropriate connectors on your recorder 7 Time Code Output Level the F22 s time code output level is adjusted to maximum amplitude
13. Transmitter must set these bits to O and receiver should ignore YYYYYY Seconds Count 0 59 MINUTES COUNT xx yyyyyy xX Undefined and reserved for future use Transmitter must set these bits to 0 and receiver should ignore YYYYYY Minutes Count 0 59 HOURS COUNT x yy 22227 x Undefined and reserved for future use Transmitter must set this bit to 0 and receiver should ignore yy Time Code Type 0 24 Frames Second 1 25 Frames Second 2 30 Frames Second Drop Frame 3 30 Frames Second Non Drop 2ZZZZZ Hours Count 0 23 Full Message 10 bytes FO 7F lt channel gt 01 lt sub ID 2 gt hr mn se fr F7 FO 7F Real Time Universal System Exclusive Header lt channel gt 7F message intended for entire system 01 lt sub ID 1 gt MIDI Time Code lt sub D 2 gt 01 Full Time Code Message hr hours and type 0 yy zzzzz yy type 00 24 Frames Second 01 25 Frames Second 10 30 Frames Second drop frame 11 30 Frames Second non drop frame zzzzz Hours 00 gt 23 mn Minutes 00 gt 59 sc Seconds 00 gt 59 fr Frames 00 gt 29 F7 EOX Time is considered to be running upon receipt of the first Quarter Frame message after a Full Message B2 B3 User Bits Message 15 bytes E0 7F lt chan gt 01 lt sub ID 2 gt ul u2 u3 u4 u5 ub ul us ud F7 FO 7F Real Time Universal System Exclusive Header chan 7F message intended for entire system 01 lt sub ID 1 gt MIDI Ti
14. aused by poor re cording 1 Turn off noise reduction on audio channel that time code is being recorded on Don t use automatic level adjustment 2 Adjust output level of time code when recording Try moving the window with the arrow keys Adjust character and or background contrast to shades of gray instead of dark black and bright white If this solves your problem it indicates bad sync information Irregular incoming sync or Interval Time code disrupts time code generation erratically Time code is not normal audio program material although it is recorded on an audio channel Use appropriate tools to adjust output level control on rear panel Sometimes the window will be hidden in the over scan portion of the video Extreme white or black will sometimes exceed the limits of a normal video signal 13 RELATED INFORMATION TECHNICAL SPECIFICATIONS Video Input 1 0 Vp p 75 ohm or high impedance BNC Video Output Characters are keyed onto the input signal Unity gain amplification When the F22 s power switch is off the input signal loops through and bypasses termination BNC Time Code Out Adjustable from 0 to 4 V p p into high impedance When the F22 s power switch is off the input signal loops through either input to unbalanced outpUt Unbalanced RCA Time Code In High impedance unbalanced RCA phono connector Signal range from 500 mv to 8 V p p Field Ref Input 5 0 V p p BNC MI
15. ckground Contrast The F22 leaves the factory with its character display adjusted for white characters on a black background To change the display contrast use a small screwdriver a flat blade works best to adjust the Character Contrast Background Contrast dials on the F22 s rear panel You may vary the display to your taste from white on black to black on white Note that it is possible to adjust the display levels past nominal black and white levels and thus distort the video signal at Video Out If possible use a waveform monitor or oscilloscope to make your adjustments Otherwise route color bars to Video In and set the window s black to a maximum of slightly lighter than the black bar and the window s white to a maximum of slightly darker than the white bar Record a Window Dub A Window Dub is a copy of another tape The copy has time code numbers superimposed on the original image This section describes how to make a window dub of a tape that already has time code recorded on it To make a window dub while simultaneously recording time code on the original see To Post Dub Time Code under Generator 1 Verify the connections according to Hook Up 2 Put the source tape in the source player 3 Connect the F22 s Video Out to the Video In of the dub recorder as shown in Hook Up Configure and position the window to your taste according to the instructions above 4 Press Read 5 Start the source player in play mode
16. een two clock transitions within 0 5 percent of one clock period Measure ments of these timings shall be made at half amplitude points on the waveform 3 4 Use of Binary Groups The binary groups are intended for storage of data by the users and the 32 bits within the 8 groups may be as signed in any manner without restriction if the character set used for the data insertion is not specified and the binary group flag bits 43 and 59 are both zero If an 8 bit character set is used the binary group flag bits 43 and 59 shall be set according to the following truth table Bit 43 Bit 59 Character set not specified 0 0 Eight bit character set 1 0 Unassigned 0 1 Unassigned 1 1 Unassigned states of the truth table cannot be used and their assignment is reserved to the SMPTE A2 3 4 1 If on 8 bit character set conforming to ISO 646 1983 and ISO 2022 1982 is signalled by the binary group flag bits 43 and 59 the characters should be inserted in accordance with Fig 2 Information carried by the user bits is not specified 3 5 Assigned and Unassigned Address Bits Six bits are reserved within the address groups 4 for identifying operational modes I for bi phase correction and I unassigned bit reserved for fu ture assiqnment and defined as zero until further specified by the SMPTE Bit 10 are being dropped to resolve the difference between real time and color time as de fined in 5 2 2 a 1 shall be recorded
17. es of Address The address shall start at the clock edge before the first ad dress bit bit 0 The bits shall be evenly spaced throughout the address period and shall occupy fully the address period which is one frame Con sequently the bit rate shall be 80 times the frame rate in frames per second See 3 2 1 for defini tion of a television frame 416 7442 05 190 P P Ale T 4 2us B 208 0 21 D BIT NG TRANSITION CLOCK TRANSITION e 25 155 I BIT y TRANSITION CLOCK CLOCK TRANSITION TRANSITION Fig 1 Longitudinal Recorder Waveform 3 2 2 2 Start of Address The start of the ad dress shall occur at the beginning of line 5 in fields I and Ill as defined in EIA Tentative Stand ard No 1 The tolerance shall be 1 line 3 3 Longitudinal Recorder Input Waveform Char acteristics See Fig 1 3 3 1 Rise Time The rise and fall times of the clock and one transitions of the code pulse train shall be 25 5 microseconds measured between the 10 and 90 percent amplitude points on the waveform 3 3 2 Amplitude Distortion Amplitude distor tion such as overshoot undershoot and tilt shall be limited to 2 percent of the peak to peak am plitude of the code waveform 3 3 3 Time of Transitions The time between clock transitions shall not vary more than 1 per cent of the average clock period measured over at least one frame The one transition shall occur halfway betw
18. he following situations are the most common applications for the F22 s generator e You have shot a source tape in the field or in the studio and wish to post dub time code on one of the audio channels e You are preparing an edit master for insert editing by pre recording black on the video channel and time code on the address track if available To Post Dub Time Code Note Many professional video recorders provide an address track specifically intended for time code Be aware that most of these recorders do not provide for an audio dub on the address track In other words you CAN NOT POST DUB TIME CODE ON AN ADDRESS TRACK 1 Put the source tape in a recorder that is capable of an audio dub the source recorder The source tape must have video recorded on it and must have at least one audio channel free to record the time code 2 Verify the connections according to Hook Up 3 You may record a window dub on a different tape while you post dub time code on your source tape To do so connect the F22 s Video Out to the Video In of the dub recorder as shown in Hook Up Configure and position the window to your taste according to the instructions under Character Inserter on page 7 4 Prepare the source recorder for audio dubbing on the unused audio channel S Preset the hours minutes and seconds digits as you wish See Preset 6 Press Gen to start the time code 7 Start the source recorder in audio dub mode and adj
19. his standard is intended for use in conjunction with the following standards EIA Industrial Electronics Tentative Standard No 1 Color Television Studio Picture Line Amplifier Output Drawing International Standard ISO 646 1983 Informa tion Processing ISO 7 Bit Coded Character Set for Information Interchange International Standard ISO 2022 1982 Informa tion Processing ISO 7 Bit and 8 Bit Coded Character Sets Code Extension Techniques Sponsor Society of Motion Picture and Television Engineers 3 Longitudinal Track Application 3 1 Modulation Method The modulation method shall be such that a transition occurs at the be ginning of every bit period One is represented by a second transition one half a bit period from the start of the bit Zero is represented when there is no transition within the bit period See Fig 1 3 2 Code Format 3 2 1 Frame Make up Each television frame shall be identified by a unique and complete ad dress A frame consists of two television fields or 525 horizontal lines The frames shall be num bered successively 0 through 29 except as noted in 5 2 2 Drop Frame If color frame identifica tion in the code is required the even units of frame numbers shall identify Frame A and odd units of frame numbers shall identify Frame B as defined by EIA Tentative Standard No 1 3 2 2 Frame Address Each address shall con sist of 80 bits numbered 0 through 79 3 2 2 1 Boundari
20. me Code lt sub id 2 02 User Bils Message ul u2 u3 u4 ud ub ul ug u9 F7 i i HoOodaaaa 0000bbbb 0000cecE 0000dddd 0000eeee OOODOLLEL 0000gagg 0000hkhhh 000000ii EOX APPENDICES These nibble fields decode in an 8 bit format aaaabbbb cccedddd eeeeffff gggghhhbh ii It forms 4 8 bit characters and a 2 bit Format Code u1 through u8 correspond to SMPTE Binary Groups I through 8 u9 are the two Binary Group Flag Bits as defined by SMPTE E E ee Further details and implementation information regarding MIDI Time Code can be found in the MIDI 1 0 Detailed Specification available from the international MIDI Association 3316 W 57th St Los Angeles CA 90056 tel 213 649 6434
21. nts such as sequencers or computer based cue list programs via MIDI Time Code The F22 can convert SMPTE time code into MIDI protocol Simply press the MIDI TC button While generating SMPTE time code the F22 will continuously output the equivalent MIDI time code at the rear panel MIDI Out connector The F22 outputs MIDI Time Code when it is set to Gen Regen or Jam Sync Regen is the best choice to convert an existing time code track to MIDI time code For a thorough technical discussion of MIDI see Appendix B MIDI Specifications 10 RELATED INFORMATION FACTS YOU SHOULD KNOW Time Code is an audio signal It must be recorded and played from an audio channel An address track is an audio channel designed for time code Time Code is synchronized with the video signal and the audio time code information corresponding to each frame number is exactly as long as one frame If you intend to use the F22 s time code output on a video recording you must connect that video signal to the F22 s Video In connector when generating to insure generated time code is correctly synchronized with video If you are using the F22 s Time Code output on an audio recording you do not need to route any signal to the F22 s Video In connector Time Code is a high level audio signal and if may bleed over onto adjacent sound tracks if recorded at too high a level The goal is to record the Time Code at as high a level as possible without interfering with the
22. other channels Experiment until you arrive at a level that works consistently with your recorders then stick with it If your recorder has an address track use it Otherwise use the audio track closest to the edge of the tape channel 1 on 3 4 inch VCRs Avoid using an automatic recording level The address track is a specialized audio channel designed to record and reproduce SMPTE time code Not all VTRs are equipped with address tracks Aside from the obvious benefit of freeing up both audio channels for production sound the address track does a much better job than an audio channel of playing back Time Code at all search speeds The address track has one serious limitation you can record Time Code on it only when you are recording video at the same time Thus you cannot post dub time code onto an address track 11 RELATED INFORMATION TROUBLE SHOOTING TIME CODE SYSTEMS To isolate problems isolate equipment If operation of the F22 is in question remove the unit from your system and test it individually 1 Unplug all inputs and outputs from the unit 2 Connect the power plug If possible use a different circuit than the one on which you observed problems 3 Generate time code and record it on an audio cassette deck and set the recording level to at least 0 dB Use different patch cords than those you were using when you noticed the problem and do not route through a patch bay or a distribution amplifier 4 Play back the ta
23. pe Attempt to read regenerate and jam sync to the time code on the tape 5 Run video from house black or a color bar generator to the unit Again use fresh cables and avoid patch bays and distribution amplifiers 6 Run video from the F22 to a monitor 7 Test the F22 s ability to do window dubs If your F22 does not pass these tests please contact your dealer factory authorized representative or the factory directly Please be prepared with your unit s serial number the dealer you purchased the unit from and the approximate purchase date Your satisfaction is our number one priority If this simple procedure convinces you that your unit is properly generating and reading time code and you can insert a window dub on a known good video source then refer to the following list of problems and solutions 12 PROBLEM Time Code loses time Video level too low or looks bad Can t move window or window jumps Time code is erratic or numbers freeze when reading Difficulty reading time code No window dub when the window is turned on Window dub causes flagging RELATED INFORMATION SOLUTIONS Gen lock input video and time code generator to a good external source Change impedance switch pos ition Only push one of the arrow keys at a time Press firmly Gen lock video and the F22 to previously recorded vertical video source such as a color bar generator Problems reading time code are generally c
24. r is on when the F22 is set to generate drop frame time code User Bits switches the F22 s displays between time code and user bits Note that once you have set the user bits the F22 will generate those user bits until you explicitly change them through Preset These user bits will appear in time code generated in Gen and Jam Sync Pause will put the F22 in a standby state when you switch from Preset to Gen JAM SYNC In Jam Sync the F22 matches its output too incoming time code The F22 generates as usual and continuously monitors the Time Code In connector When incoming time code starts or changes the F22 synchronizes with it When incoming timecode stops the F22 continues generating The most common use for jam sync is to continue time code where it stops on a previous recording Common situations are e You are shooting a source tape in the studio and wish to record time code as you go making sure that the count remains continuous even when the recorders are stopped between takes e You wish to replace a section of time code that is missing perhaps accidentally erased To Replace Sections of Time Code 1 Verify the connections according to Hook Up Note that both the F22 s Time Code In and Time Code Out must be connected to the source recorder s appropriate Audio Out and Audio In 2 Prepare the source recorder for an audio insert edit on the appropriate audio channel 3 Confirm that the F22 is set to generate time code in the
25. the Arrow Keys select and set the time code and user bit digits See Instructions for Use under Preset on page 8 When you press Window the indicator light at the center of the Arrow Keys comes on Now Up changes the size of the character display or window See Instructions for Use under Character Inserter on page 7 Display shows either time code or user bits Time code is displayed as hours minutes seconds and frames The frames digits will turn off when the F22 is reading time code over five times play speed Drop The indicator light is on when the F22 is working with Drop Frame SMPTE time code The button functions only when Preset is on See Instructions for Use under Preset User Bits switches the F22 s front panel display between time code and user bits When the User Bits Indicator is on the display shows the numeric user bits that the F22 is generating or reading Window this button changes the character display on the video screen Each press moves to the next of three possible choices 1 characters on background on 2 characters on background off 3 window off Once you have pressed Window the arrow keys change other aspects of the character display See Instructions for Use under Character Inserter Pause In Gen this button pauses the F22 s time code output When in Read Jam Sync or Regen this button freezes the F22 s front panel Pause display but the window and time code output continue 3 C
26. tial damages for breach of any express or implied warranty on this product Any implied warranty is limited in duration to the duration of this warranty Some states do not allow the exclusion or limitation of implied warranties or liability for incidental or consequential damages so the above limitation may not apply to you This warranty gives you specific legal rights and you may also have other rights which vary from state to state 15 APPENDICES A1 APPENDICES APPENDIX A SMPTE TIME CODE SPECIFICATIONS ANSI SMPTE 12M 1986 Revision and Redesignation of ANSI V98 12M 1981 American National Standard for television time and control code video and audio tape for 525 line 60 field systems Approved January 29 1986 1 Scope 1 1 The first part of this standard specifies a for mat and modulation method for a digital code to be recorded on a longitudinal track of video and audio magnetic tape recorders The code is to be used for timing and control purposes 1 2 The second part specifies the digital format to be inserted into the television signal vertical interval to be used for timing and control pur poses in video magnetic tape recorders This part also specifies the location of the code within the television baseband signal and its relationship to other components of the television signal and to the longitudinal track code described in the first part of this standard 2 Referenced Standards T
27. ust the audio record level See Facts You Should Know for additional information on setting the audio level correctly 8 Start the dub recorder in record mode 9 You may Pause the time code output at any time However to achieve an uninterrupted time code recording allow all machines to run Pause continuously until the source tape ends To Prepare an Edit Master 1 Insert a blank tape into the source recorder 2 Verify the connections according to Hook Up Use your recorder s address track if available 3 Be sure to route a black burst video signal from an appropriate source to both the source recorder and the F22 s Video In 4 Preset the hours minutes and seconds digits as you wish Select the format you wish to use SMPTE drop or non drop frame See Preset INSTRUCTIONS FOR USE 5 Press Gen to start the time code 6 Start the source recorder in record mode and adjust the audio record level Review Facts You Should Know for further information 7 Allow the recorder to run until the tape ends Indicators and Controls Gen e Video Lock is on when the F22 s time code output is successfully synchronized with the signal at Video In e MIDI TC switches the MIDI time code output on and off When the indicator is on the F22 is generating MIDI time code e Pause halts the F22 s time code output CHARACTER INSERTER The F22 contains a video character inserter which can superimpose a display of time code and user bits on
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