Manual - Brainstorm Electronics
Contents
1. ANALYZER Operation Manual Software Version 3 05 Von Y E BRAINSTORM LECTRONICS INC Intelligen is s For The Recording Studio 17 gt Code User READER 00900800 Color Fr IME CODE c T ANALYZER Signal In COUNTER 0000 SOURCE BEEPER Drop Fr Brainstorm Good Code Electronics Hu Frame iTITr Rete C Video Code Code off On 1 Reset Switch Pushbutton to reset SA 1 or clear displays 2 Signal In Lights up when signal is present Any signal above 30db lights this LED 3 Good Code Lights up when valid code is present blinks off momentarily if a Fatal time code error is detected 4 Reader 8 digit display Reads time code user bits or video phase also displays error types and faulty addresses 5 Reader Select Selects the mode of the 8 digit display Time code User bits Video o 6 Counter 4 digit display Reads the frame rate fr sec of the incoming time code or video signal 7 Counter Select Selects the input of the 4 digit counter Code Video 8 Beeper Switch Turns beeper off 9 ASCII LEp On when ASCII flags are set On means User bits are ASCII off means Hex 10 Color Frame On when Color flag is2. SECOND BINARY GROUP SECONDS UNITS COLOR FRAME FLAG THIRD BINARY GROUP SECONDS TENS BI PHASE MARK PHASE CORRECTION BIT FOURTH BINARY GROUP SECOND BINARY GROUP SECONDS UNITS THIRD BINARY GROUP SECONDS TENS BINARY GROUP FLAG BIT MINUTES UNITS FOURTH BINARY GROUP FITH BINARY GROUP MINUTES TENS BINARY GROUP FLAG BIT MINUTES UNITS SIXTH BINARY GROUP FITH BINARY GROUP MINUTES TENS BINARY GROUP FLAG BIT HOURS UNITS SIXTH BINARY GROUP SEVENTH BINARY GROUP HOURS TENS HOURS UNITS SEVENTH BINARY GROUP HOURS TENS UNASSIGNED ADDRESS BIT 58 BINARY GROUP FLAG BIT UNASSIGNED ADDRESS BIT 58 EIGHTH BINARY GROUP MARK PHASE CORRECTION SYNC WORD ZERO SYNC WORD BIT ZERO SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ZERO SYNC WORD BIT ONE EIGHTH BINARY GROUP Figure 6 SMPTE longitudinal bit assignment SYNC WORD BIT ZERO SYNC WORD BIT ZERO SYNC WORD BIT ONE SYNC WORD
3. Synced The last valid address is SS ENG 01 23 45 07 printed at very end of the report Time Code Report Page 14 Section 3 Application notes As a general rule it is always better to know about time code prob lems early rather than late in a project More options are available early on to fix the problem and if it cannot be fixed and you have to start over at least less time has been wasted Here are some specific suggestions regarding the use of the SA 1 1 When striping a tape run time code through the SA 1 Don t take your time code generator for granted Maybe you didn t set it properly maybe one of the 1 05 is broken maybe the instructions are not clear maybe it is broken There are plenty of good reasons why your generator could generate something different than what you wanted Patch the output of your time code generator into the SA 1 and the SA 1 s loop into your tape machine Through the SA 1 you can monitor your generator At this stage if there are any errors you only have to re stripe correctly to fix the problem It could be a lot worse if discovered later You can even print a report during recording by analyzing the recorded time code off the playback head The report will show any problem with the generator or with the recording 2 Print a time code report from pre striped tapes When working with a pre striped tape you should run this time code through the SA 1
4. SA 1 side Solder the 3 pins needed as described in the table below 8 pin Mini Din Note For convenience you can use a standard modem cable and replace one of the Din connectors with a DB 9F Pins 4 SG and 8 RXD are usually tied on the Mac side which is OK SA 1 Mac 9 pin Sub D 8 pin Mini Din Signal Out 2 TxD 5 RxD Signal In 3 RxD 3 TxD Ground 5 SG 4 SG PC make up a cable with 25 pin sub D on the the PC side and a 9 pin sub D female connector on the A 1 side Solder the 3 pins needed as described in the table below IMPORTANT ON THE PC SIDE 25 PIN SUB D PINS 6 AND 20 DSR DTR MUST BE TIED TOGETHER SA 1 PC 9 pin Sub D 25 pin sub D Signal Out 2 TxD 3 RxD Signal In 3 RxD 2 TxD Ground 5 SG 7 SG 6 DSR 20 DTR Serial printer To connect an Apple ImageWriter printer use the above described Mac cable For serial printer with a DB25 connector use the PC cable For other printers refer to your printer s manual for pin configuration Page 4 Section 2 Using the SA 1 A Time Code Format amp Frame Rate When playing time code into the SA 1 it first identifies its format Reader Display As soon as valid time code is recognized its format or frame count is indicated in the 8 digit display for about 2 seconds The display then automatically switches to its selected mode time code user bits or video c
5. THE 3 STANDARD TIME CODE FORMATS ARE 24 25 OR 30 FR SEC The 4 1 5 on the right of the display further identify the time code The ASCII D indicates the user bits format If the LED is off UB format is Hex if the LED is on UB format is ASCII ASCII is often used to identify a scene reel date or camera number The Color Frame indicates whether code is color framed or not This LED comes on if the color flag is set bit 11 it is off if the flag is not set The Drop Frame LED indicates the drop frame status This LED comes on as soon as the microprocessor detects a drop frame flag bit 10 set But the SA 1 also monitors the code to make sure the proper frames are actually being dropped If they are not the LED blinks mostly off false flag If frames are properly dropped but the DF flag was not detected the LED blinks mostly on missing flag Note Since frames are dropped at the end of the minutes this LED will not start blinking until the microprocessor sees a minute boundary of good code The Video Code LED Indicates whether code is in sync with video or not This LED comes on only if a video reference is present For the different modes of this LED see page 7 Page 5 4 digit display indicates the frame rate or frequency The EEEH SR 15 strips the bit clock from the incoming time code and displays it as frames per seconds It displays any rate fr
6. BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD BIT ONE SYNC WORD ZERO SYNC WORD BIT ONE Figure 7 EBU longitudinal bit assignment Page 20 Specifications Time Code Reader 8 digit display character height 12 Speed range reads at play speed only 25 Frame Rate Counter 4 digit display character height 12 Reading range 21 to 39 fr sec Display accuracy 20 ppm plus 2 the least significant digit Resolution 01 Fr sec Update rate 4x per sec Connectors 1 4 Jack 2 time code in amp loop BNC Video In DB 9M Serial port 2 5mm jack Power inlet center pin hot Termination switch 75Q to ground for Video In Power 6 9 VDC Dimensions 5 x 1 10 x 5 W Page 21 Other Brainstorm Products SR 15 Time Code Distripalyzer Combines 3 units in a single space 19 chassis a time code analyzer 1x5 Time code distributor w reshaping on all 5 outputs and a pilot tone stripper The analyzer identifies time code format detects errors and monitors video sync and color field alignment A comprehensive report can be sent to a printer or computer via the parallel and RS 232 ports SA 1 Time Code Analyzer Same analyzer as the one found in
7. and sleeve of the 1 4 input jack are shorted Code Restarted Follows a Code Stopped message Indicates where time code reap peared Video Restarted Follows a Video Loss message Indicates where Video reappeared Still Frame Reported if the same address is detected consecutively 3 times or more Appendix B More on the Frame Rate Counter Since the least significant digits LSD resolution is 01 frames per second 033 any wow flutter or speed variation of your time code source is easily detected a Time code generators generally display a very steady frame rate with no fluctuation whether on internal crystal external video or tone reference A one LSD fluctuation probably would not cause any problems b Analog tape machines have typical wow flutter speed specifica tions of 03 to 1 or more Therefore a fluctuation of 2 or even 3 LSD is normal Machines like the Sony APR 24 or Otari MTR 90 are quite stable and may only move 1 LSD every 5 to 10 sec c 3 4 VCR5 have wow flutter specs up to 3 They can therefore fluctuate almost 1 frame the address track is usually more stable than the 2 audio tracks However a machine in good condition usually fluctuates less than 1 frames Page 18 Appendix C More on the video phase display When the SA 1 detects F1L5 actually F1L4 gt as detected by the LM1881 video sync detector it looks at which bit is in the time code w
8. code moves by more than 2 bits with respect to video F1L5 If the time code generator was mistakenly set to internal crystal instead of external video there would be a very slow drift between time code and video The SA 1 reports this drift as soon as time code moves by more than 2 bits with respect to F1L5 even if it is within the properly phased window Page 8 the reader display you can monitor the sync between time code and video With its selector switch in the video position the reader shows which bit of the time code word lines up with video Field 1 Line 5 V drive With synchronous code the display should read bit 79 In the real world however things are different and phase will often be slightly off For example if the display reads bit 68 or bit 07 the address track was possibly misaligned on the VCR and your synchronizer may show some slight sub frame offset i e 03 12 elc when locked to code like this So long as you are within a few bits of 79 and the bit number stays the same you should have no problems Note If V drive is at the edge of a time code bit 2 bit numbers those on either sides of that edge will flicker in the display WARNING IF THE BIT NUMBER DRIFTS TIME CODE IS ASYNCHRONOUS AND MAY BE USELESS FOR YOUR APPLICATION C Reporting Time Code Errors One of the functions of the SA 1 is to detect and report time code errors Errors consi
9. set bit 11 off when flag is not set 12 Drop Frame On solid for drop frame code blinks mostly on for missing DF flag bit 10 blinks mostly off for false DF flag off for non drop code 13 Video Code On solid if code is synchronous and in phase with video blinks mostly on if code is out of phase blinks mostly off if code is drifting off if no video is present TIME CODE INPUT VIDEO IN oft 175 14 Power jack 2 5mm power input jack Requires 6 to 12VDC with center pin positive 15 Serial port DB 9M for RS 232 I O 16 Time Code Loop 1 4 jack connected internally to the time code input jack 17 Time Code Input 1 4 for source time code 18 Video Input BNC connector for video reference 19 Termination switch turns on 750 termination for video reference Page 1 Introduction The SA 1 is a powerful hand held analyzer designed to quickly and accurately identify time code problems The SA 1 identifies the type stability and frame rate of the incoming code it verifies its proper syn chronization phase with video and it reports time code errors i e drop outs It is the same analyzer as the one found in the Brainstorm SR 154 Distripalyzer so it should be easy for SR 15 users to operate the SA 1 Table of contents Section 1 Setting up the SA 1 discoid D 2 WANING eiie et p ete
10. 7 Drop frame code leaves certain frame numbers out so that one hour of code time equals one hour of stopwatch time when code is running at 29 97 Drop and non drop code can both be generated at a rate of 30 or 29 97 fr sec For that reason the frame rate and the drop frame status are displayed separately on the SA 1 s front panel Page 6 Proper bit width In LTC each word is divided into 80 equal segments called bits num bered 0 to 79 for bit assignment see appendix D on page 18 Each bit can either be a one or a zero a one has a level shift half way though its width a zero does not The time between each level shift can easily be calculated At 30 fr sec it is 417ps for a zero and 208ys for a one At 25 fr sec it is 500ps for a zero and 250ys for a one At 24 fr sec it is 521ys for a zero and 260ys for a one The SA 1 has a 25 window which means that at 30 fr sec the level of a zero could remain constant for 313 to 521 and of a one for 156 to 260ys ti 4175 A 208s Figure 2 Bit width at 30 fr sec However some VCR s distort the bit width beyond that window the one s become too narrow If the SA 1 does not recognize valid time code with a signal present at its input for over 1 second it switches automatically to an alternate setting to accommodate these distortions If time code is then recognized a alternate bit width win dow message is reported in th
11. aking the normal chain Connect the time code source to the Input jack and the time code destination to the Loop jack Video In Connect Video Composite Sync or Composite Video to this BNC This signal is used by the Analyzer to monitor phase with time code A switchable 75Q termination is also provided Serial Port RS 232 Connect a printer to this port to print a time code report or a computer such as a Mac or a PC to capture the report on the screen see next page for proper wiring lt gt Power The SA 1 requires a 6 to 12 VDC supply with center pin hot 2 Wiring 1 4 Jacks The SA 1 uses stereo 1 4 jacks for time code input and loop Pins are Tip high Ring low Sleeve ground Since time code is bi phase a reversal of low amp high wires would not cause a problem The SA 1 works with balanced and unbalanced equipment When using unbalanced equipment with the SA 1 wire your cables as described in the diagrams below TIP LI 00 gt CUL SENI _ISTEEVE SA 1 Input SA 1 Loop out Figure 1 Proper unbalanced wiring diagrams Page 3 Serial Port DB 9M Only 3 pins are used on this connector Pin 2 is RS 232 out TXD pin 3 is RS 232 in RXD pin 5 is ground To connect a computer follow the instructions below Mac make up a cable with an 8 pin mini Din conneclor on the side and 9 a 9 pin sub D female connector on the s
12. and print a complete report as soon as possible preferably before you even start the session See if the format is correct check the video phase and make sure there are no drop outs or any other type of errors If a client brings a tape with faulty time code to your studio he will usually blame your equipment for the sync problems and it can be very frustrating The time code report ends any argument before it is even started If you are a composer and you receive a work copy from a transfer house you can save a lot of aggravations by finding out about non synchronous time code before you record any music Page 15 If you do not have time to run the tape through the analyzer before the start of the session make sure that the time code is running through the SA 1 during the session 4 Align your VCR s address track You can align the address track on your VCR by connecting the address track time code and the video signal into your SA 1 Select video on the reader selector switch and move the address track head until you read bit 00 then move it back a little and stop as soon as you read bit 79 This way the trailing edge of bit 79 will be aligned with F1L5 see figure 4 page 18 WHAT TO DO ONCE YOU DISCOVERED A PROBLEM There are many different types of problems that can occur with time code Many times the solution will depend of how early in the proj ect it was discovered Following are some very general su
13. dered serious enough to cause a synchronizer problem such as a repeated frame are labeled fatal by the SA 1 Others are non fatal For a complete list see appendix A on page 16 Reporting errors on the SA 1 front panel All fatal errors are reported on the front panel fatal and non fatal errors are both reported on the printed report The 8 digit display Every time the SA 1 detects a fatal error the reader is momentarily interrupted and displays a description of the error i e Drop out etc for about 2 seconds Then it returns to its selected mode of operations time code user bits or video After the SA 1 has detected a fatal error the first digit of the Page 9 reader display blinks continuously until cleared or reset This way if you leave the room you will know if an error occurred while you were away After tape has been stopped code must be interrupted for at least 5 seconds the 8 digit display shows a description of the first fatal error detected for about 2 seconds After these 2 seconds it indicates where the error occurred and then alternates between the faulty address and its description If no error occurred the display alternates between a Code Stopped message and the last valid time code address View the first five errors The SA 1 keeps the first 5 errors detected in memory After time code has been stopped tap the reset button to toggle through
14. e time code report The SA 1 remains on this alternate setting until reset automatically or manually Page 7 B Time Code Video Phase What does it mean for time code to be in phase with video When time code is recorded on video tape it must be synchronous with the video signal meaning that the beginning of each time code word must coincide with the beginning of the video frame it describes This is essential for video editing There is one time code word for each frame Each word is made up of 80 bits numbered from 00 to 79 see diagram below Time code is phased properly with video when the end of bit 79 of time code lines up with field 1 line 5 of video 1 line How can you check video phase with the SA 1 ONE TIME CODE FRAME 12 35 08 28 gt lt Sync Word Sync Word 64 68 72 76 0 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 68 72 76 0 1 Video Field 1 F2L5 Video Field 2 ONE VIDEO FRAME Figure 3 Proper alignment of time code and video The Video Code indicates 4 different conditions on time code is properly phased with video blinking mostly on time code is resolved with video but out of phase blinking mostly off time code is non synchronous drifting off no video is present The SA 1 considers time code properly phased if the time code bit lined up with video F1L5 is between numbers 75 and 04 The SA 1 considers it non synchronous if time
15. er through the rear panel serial port Using a Printer with the SA 1 To send a time code report to a printer connect it to the RS 232 port turn it on and set it so that it is ready to print on line If you are using a parallel printer you need to connectit through a serial to parallel converter If using a serial printer connect it directly to the SA 1 When you play time code into the SA 1 a report is immediately initiated see time code report on page 12 The header is first printed as well as the formot the video refer ence information and the start time The SA 1 then prints the title address errors and waits for errors to happen As soon as they occur the faulty address and a description of the error is printed An end of report is printed automatically when time code is inter rupted for at least 5 seconds This includes a summary and the end time In the summary the SA 1 reports general comments such as Time Code properly synced with Video or not and non standard formats such as Color Framed Code not synced with Video or 25 Drop code etc Both serial and parallel printers can be used with the SA 1 However you should use the kind of printer that prints one line at a time such as dot matrix printers and not full page printers such as laser printers If you want to use a laser printer you should first send the report to a computer as described below then send the report from the computer to the laser pri
16. ggestions Problems Solutions Time code is synchronous but out of phase with video Use a delay line to delay time code until the phase display reads bit 79 Time code is non synchronous with video There is a hole in the time code track i e accidental punch in Generate new time code referenced to video Use a time code generator set to jam sync and regenerate new code Repeated frame or missing frame Regenerate new time code The wrong time code format was recorded Regenerate new code with a generator that can do format conversions NOTE Many of the problems listed above can be solved with the Brainstorm SR 3 Time Code Repair Kit For more information call your Brainstorm Electronics dealer Page 16 Appendix A Time Code Error Messages Fatal errors are the ones considered serious enough to cause a synchronization problem All fatal errors are reported on the front panel and activate the buzzer and the relay fatal and non fatal both appear on the report with their corresponding time code address FATAL ERRORS fatal errors are reported on the front panel as shown in parentheses Drop out DROP OUT Interruption of time code for less than 1 second Level has to fall below input threshold of 30cB Code Stopped CODESTOP Interruption of time code for more than 1 sec Repeated Frame DISCONT Same frame address detected twice consecutively Discont
17. inuous address DISCONT Any non continuous address either ascending or descending Invalid Address INVALID Any non valid number such as 39 frames or 75 minutes Video Loss VID LOST Any interruption in the video signal Format Change FORM CHG Change in the time code count Wrong number of frames dropped DROP X Reports errors in Drop Frame format Indicates how many frames were dropped Change in DF status DROP CHG Reported if DF flag changes Change in Color status COLR Reported if Color flag changes NON FATAL ERRORS some of these messages are not errors but just changes Bad Bit XX Any bit wider or narrower than 25 of time code specifications XX indicates the number of bad bits for that frame Bad Sync Word Reported if no Sync Word was detected after 256 bits Page 17 Code not in Sync with Video If time code slips by more than 2 bits with respect to video V drive Undefined Bit Set Reported if one of the undefined bits is set 5 bit 58 bits 10 amp 58 Alternate bit width window Reported if the SR 15 had to go to this setting in order to read time code see pg 6 Change in User status Reported if UB flag changes User Bit Change If User Bits messages change the first 30 different messages are reported After that the SA 1 disregards any change until reset External trigger in Reported with its coinciding time code address when tip
18. l eine dat 2 Section 2 Using the SA 1 Time Code Format and Frame Rate 4 Frame Rate vs Format 29 97 vs Drop Frame 5 Proper bit width ioci Co eiit dtes 6 Time Code Video Phase 7 What does it mean for code to be in phase with video 7 How can you check video 7 Reporting Time Code Errors tiec cedido eese ee tates dione 8 Front panel error messages 9 What is the difference between Reset and Clear 10 How do you reset or clear the SA 12 10 Transmitting A Time Code Report 11 Using a printer with SA 1 11 Using a computer with the SA 1 12 Time Code Report 13 Section 3 Application notes 14 Appendix Time Code Error Messages 16 B More on the Frame Rate 17 C More on the video phase 18 D Longitudinal Bit Assignment SMPTE amp EBU 18 SS HCAS eset ecce attentat 20 Page 2 Section 1 Setting up the SA 1 1 Connections Time Code input Connect your time code source to the rear panel input jack Time Code loop This enables the user to analyze time code without bre
19. l sequence again the SA 1 identifies the time code format and displays it for about 2 seconds in the 8 digit display see page 4 the front panel LED s are all reset the first 5 errors register is erased new time code report is initiated through the serial amp parallel ports e Clear A Clear command clears some of the SA 1 s displays If an error has been detected and the 1st digit of the reader is blinking a clear command stops the blinking and clears the first 5 errors register i e the next error detected will now be considered to be the first error If the video code 1 is blinking a clear command stops the blink and resets the LED How do you reset or clear the SA 1 Manual Reset To manually reset the SA 1 press and hold the reset button for at least 1 second The 8 digit display will say reset Auto Reset When code is interrupted for at least 5 seconds an end of report is initiated When code is reintroduced the SA 1 is automatically reset Manual Clear Tapping the reset button while code is running dears the displays as described above Auto Clear partial When code is interrupted for at least 1 second the video code LED is automatically cleared when code is reintroduced Page 11 D Transmitting a Time Code Report A complete report including fatal and non fatal errors as well as format information can be sent to an external printer or comput
20. ler BRAINSTORM ELECTRONICS INC www brainstormtime com Distributed Exclusively by plus24 West Hollywood CA USA Tel 323 845 1155 Fax 323 845 1170
21. nter This would also allow you to cus tomize the report if needed by adding information such as the date the name of the studio the name the client etc Page 12 Using a Computer with the SA 1 1 Connect the SA 1 to a serial port of your computer see page 2 for wiring information On the Mac you can use the Modem or the Printer port 2 Launch any communication program i e modem program set your computer for direct connection not through phone connection select the proper serial port and set the speed and format as follows Transmission speed 9600 baud Bits per character 8 Stop bits 1 Parity None 3 The procedure to send a report to a computer is identical to the one for a printer As soon as you play time code into the SA 1 a report appears on the screen f any errors are detected they will be reported as they occur An end of report will automatically be generated as soon as input is interrupted for at least 5 seconds Time Code Report The time code report includes 7 sections 1 Header Line 1 BRAINSTORM SR1 5 VER Line 2 TIME CODE DISTRIPALYZER Line 3 TIME CODE REPORT 2 Format Frame count amp drop status 24 25 30 Drop Frame or 30Non Drop Color bit status reported only if active Color Bit active Parity bit status reported only if active Parity bit active User Bits format User Bits HEX or ASCII User Bits message Page 13 first UB message de
22. om approximately 21 to 39 fr sec The frame rate counter is updated 4 times per second Since its resolution is 01 fr sec it can show potential problems such as jitter see Appendix B More on the frame rate counter on page 17 Format vs Frame Rate The SA 1 s 4 digit display indicates frame rate Nor format There is a distinction The format does not deal with frequency It is a way of counting at 30 fr sec the frame sequence is 28 29 00 01 etc at 25 fr sec the frame sequence is 23 24 00 01 etc at 24 fr sec the frame sequence is 22 23 00 01 etc The frame rate on the other hand does not deal with count but frequency If the tape speed varies the frame rate varies For example if a tape machine was running 5 too fast a format of 24 fr sec would have a frame rate of 25 20 fr sec Yet the format would remain 24 fr sec 29 97 vs Drop Frame Many people confuse 29 97 with drop frame but they are not the same thing 29 97 indicates a rate frequency and drop frame indicates a format count 29 97 time code is 30 fr sec code with a rate of 29 97 When generating 29 97 time code the generator locks to a field rate of 59 94 Hz NTSC color rate and pulls down the frame rate by 1 to 29 97 But the format or frame count remains 30 fr sec Drop Frame on the other hand is another way of counting frames It is a variation of 30 fr sec format invented to compen sate for the color rate of 29 9
23. orking register The number of that bit is displayed in the video phase window However the highest resolution of time code is one bit which is about 417 psec while a video line is about 63 psec This means that there are approximately 6 gt video lines per time code bit L1 213 4 5 61 71 8 9 g0 vino y Line 5 CODE K gt l Figure 4 Proper alignment of video and time code Appendix D Longitudinal bit assignment Each word of LTC is divided into 80 equal segments called bits numbered O to 79 These bits are mainly grouped by four into Binary Coded Decimal words to form decimal numbers 0 to 9 Twenty six of these bits are assigned to the Time Address information frames seconds minutes and hours thirty two are assigned to the Binary Group information user bits sixteen are used for sync sync word and the remaining six are used for flags or are still unassigned Figure 5 SMPTE Word Address 05 38 14 29 User Bits 00000000 drop amp color flags set SMPTE has a frame rate of 30 fr s and EBU 25 fr s but both time codes have the same 80 bits per word Most bits are the same but some of the flags are different FRAME UNITS FIRST BINARY GROUP Page 19 FRAME UNITS FRAME TENS DROP FRAME FLAG FIRST BINARY GROUP COLOR FRAME FLAG FRAME TENS UNASSIGNED ADDRESS BIT 10
24. tected is printed NOTE If SA 1 had to switch to the alternate setting to read time code see Proper bit width on page 4 the following message is printed just above the Format heading Alternate bit width window 3 Video Reference If video is present the SA 1 reports which bit of time code is lined up with V drive video field 1 line 5 3 seconds after time code is detected to allow for ramp up time if video is not present the SA 1 reports Video not present 4 StartTime First valid Time Code address 5 Address Errors The SA 1 prints the title ADDRESS ERRORS then waits for errors to occur As soon as an error is detected the faulty address and the error description are transmitted 6 Summary When input is interrupted for 5 seconds an end of report is print ed which includes the following Video Sync if video reference was present BRAINSTORM SR 15 Ver 3 05 Time Code Distripalyzer code properly synced TIME CODE REPORT code resolved but out Alternate Bit Width Window of phase FORMAT code non synchronous Color Bit active User bits HEX 01234567 Non standard formats if EEUU applicable Present pPlicab e s AM 24DF ER TEE EU 25 DF 01 00 00 00 non synchronous color Gr ADDRESS ERRORS 01 12 36 05 Drop out code 0118 41 23 Bad bits 28 7 01 18 41 27 Frame repeated Undefined bit set 01 23 45 07 Code stopped 7 End Time VIDEO SYNC Code
25. the SR 15 in a small portable pack age same as the SR 3 It operates on an external 6VDC supply and can be used with a battery pack SR 26 Dual Time Code Distributor Reshaper Cleans up time code and distributes it through 6 individually buffered out puts Can be used as 2 separate units 1x4 master 1x2 slave or as a single 1x6 unit Same reshaping circuitry as the SR 1 with individual out put level controls amp switchable output rise times SR 1 Time Code Reshaper Cleans up unreadable code by eliminating distortions and level fluctuations Low input threshold better than 30db Reshapes in fast forward and rewind modes Balanced or unbalanced input and output Adjustable output level Switchable output rise time smPTE EBU square wave SR 2 Frame rate counter Same unit as the SR 1 with a 4 digit counter that reads the incoming time code s frame rate Ideal to identify the code s format and verify 5 stability Very accurate counter 4 updates per second also shows potential problems such as wow and flutter or jitter TB 4 Communicator System wireless talkback remote A high performance infrared remote that allows the producer to activate the console s talkback from anywhere in the control room 4 switchable talk back functions Rechargeable transmitter No aiming necessary Easy to install Includes transmitter and receiver For more information on these products contact your Brainstorm Electron ics dea
26. them Each tap advances the display to the next error until the fifth one Then it returns to the first For each error the display alternates between the faulty address and its description Front panel error messages Here is a list of error messages as they are reported on the 8 digit display DROP OUT Drop out Code interruption for less than 1 second CODESTOP Code Stopped Code interruption for 1 sec or more DISCONT Discontinuous Address or repeated frame INVALID Invalid Address Any non valid number i e 39 frames VID LOST Video Loss Any interruption in the video signal FORM CHG Format Change DROP X Wrong number of frames dropped X indicates the number of frames DROP CHG Change in the Drop Frame Status COLR CHG Change in the Color Frame status Page 10 In addition to the 8 digit display the SA 1 also alerts you of errors as follows Good Code input section blinks off momentarily whenever a fatal error is detected c The Beeper sounds whenever the GOOD CODE LED changes from on to off If necessary the beeper can be turned off via the front panel on off switch The SA 1 keeps track of errors and statuses on the front panel and it may be useful at times to reset the SA 1 or clear some of its displays What is the difference between Reset and Clear Reset When you reset the SA 1 it is as if you were playing new time code After a reset the SA 1 begins its norma
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