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Service Manual

1. DCout DC output TP5 AV Vf V F converter output GAIN Parameter 100A16 gt OFFSET Parameter 100B16 8V 10000 20000 40000 80000 2710 4620 9C40 13880 1D4CO Servo generator value Figure 10 Graph of Vf vs servo generator value Machine selector resistors The DC servo is also used to read the machine selector resistors on the interface cable There are 2 resistors on each cable which form part of a potential divider The output of this potential divider is fed into a dual comparator U1 on sheet 5 which compares it s input with the output from the U9 s OFFSET DAC The KERNEL microprocessor is able to monitor the outputs of the comparator MS1 and MS2 via the TALLY buffer U21 while it increases the value in the OFFSET DAC When the MS1 and MS2 lines change state the microprocessor is able to select the correct machine file from the machine ROM 1 16 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION Serial machine control drx 232 dtx 232 tx 422 d Kernel microprocessor d scom irq 1 Figure 11 Serial machine control The ES 2 KERNEL microprocessor has a dual serial interface chip U44 One side of this chip is used for the diagnostics port while the other is used to control serial machines The port is capable of communicating with eitner RS232 or RS422 standards depending on the SEL line on the serial machine connector po
2. mx ee en E i generator NENNEN full FIFO fpga MCN buffers fpga Support eS il empty Pe gg reset Power monitor Comms microprocessor RAM and ROM CTC Figure 2 Processor and support Power monitor The power monitoring is contained in U50 sheet 6 a MAX 791 microprocessor supervisor chip This chip provides the ES 2 with the following System reset line RES A power fail signal NMI Chip select protection for the battery backed up RAM during power down RAM supply switching between the main 5V supply and the battery The reset line RES resets both of the microprocessors The peripherals are reset by a signal called ISYS RES This signal is generated by the FPGA MCN andis always active when RES is active A software controlled reset can also be sent to all peripherals via this line 1 4 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION The MAX791 continuously monitors its 5v supply for power supply failure When the 5v supply falls below 4 8V then the NMI line is pulled low The reset is active when the 5V supply is below 4 65V During power up when the supply crosses the 4 65V threshold the RES line stays active for 200ms The MAX791 also looks after the supply and chip select enable signal to the battery backed up RAM When the 5V supply is above 4 65V the RAM BVCC line in the ES 2 is supplied from the
3. ES 2 TEST SOFTWARE The ES 2 has 30 test routines built into the software They are called up when the unit is powered up with the hex switch on the program module to OF 16 On entry the ES 2 checks if there is any RAM available by storing and recalling a two byte number If the number read was different to that saved then the following message will be displayed and the test routines will halt RAM cannot be accessed properly TEST TERMINATED The ES 2 will then store and recall the numbers AA16 and 5516 to each RAM location between 0000 and 1fff16 If this test fails the test software will display Bad RAM location TEST TERMINATED If this test passes then the KERNEL processor will do the following A software controlled reset is issued to the peripherals via the SRES line which is blipped low for approximately 80ms The LTC chip is initialised The command latch is enabled by switching on Q2 via the EN OP line The LEDs controlled by the KERNEL are turned off The front panel switches are enabled by setting the SW EN line high The ICU chips U51 and U52 are initialised IRQ and FIRQ interrupts are disabled The COMMS processor is told to enter the test routines The state of the comms LED reflects the current state of the COMMS software one flash Processor is waiting to put a character into the FIFO i e FIFO is full two flashes Processor is waiting to receive a character from the FIFO i e FIFO is empty thr
4. 2 15 phase locked loop 1 26 comms SIO test 2 16 power fail signal 1 4 CRE test i lei ere es En e Tu 2 2 power monitoring 1 4 CTC ES tad AA DA BNG er em ERG 2 4 RAM messages test 2 16 DC out b test ur sr a ans 2 8 RAM supply switching 1 4 DE OULICSE ten arena 2 6 reference signalS 2 1 1 20 DC S6tVOs sss AA nea a i 1 15 reference sources 1 20 DC servo video machine C 1 DAVES tu Yu KAG ie MAG LGA 1 12 DC FM servo aa 1 15 6SGb cJ ub ma TA RE AW petu ee 1 4 default parameters 3 3 resetting default parameters 3 3 diagnostic POMS 2 et uet elk 1 10 sdjusting OFFSET on a DC servo video difflock ODEVE v TR nen 1 26 machine nn C 1 display interface 1 18 serial command routines B 1 EEPROM 1 7 serial communications control 3 25 EEPROM test 2 20 serial machine control 1 17 ES 2 GIFGUIL ass PA ed Ree gode 1 2 SEVO c o Cao a canem Rd Le Bo ded 1 14 1 15 ESbus interface 1 25 servo a lest ss cse dee v E pais 2 7 eventtiming 2222er 1 8 servo controlled wind parameters 3 23 FIFO DUNGIS a baie nee 110 SAVO Pala Eee ee oF fifo test c Eae rhe T ROUES 2 16 Setuptest sse 2 11 film machine 1 14 1 15 shuttling Be Ex a La
5. but now with a frequency range of 0 to 5V as shown in Figure 4 2N dv 1V div 20ms div 20ms div Figure 3 dc out b sweeping gain f 800Hz Figure 4 dc out b sweeping gain f 200Hz 2 8 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE TEST 15 mach sel This test requires the parallel machine connector dongle in order to read the resistors on the cable selector input The ES 2 sets the DC gain to 112 and reads the state of the MS1 and MS2 lines via the tally latch If these lines are not both low then the test fails If they are both low then the DC gain is set to a value of 120 and the state of MS1 and MS2 is checked If these lines are now both high then the test passes and following screen is displayed Checking machine cable selector Test 15 Okay Press to continue If the test fails then the screen displays Machine Cable Selector re run gt circuitry failed Press to continue gt In either case the DC gain is continually incremented until the continue key key 4 is pressed to allow the user to investigate the circuit further TEST 16 tach dir The parallel machine connector dongle is required for this test in order to loop the FILMA and FILMB outputs into the TACHA and TACHB inputs The test dongle allows the ES 2 to switch the TACHA signal between SONY_SER output and FILMA output using the servo relay The servo relay has to be switched on connecting the SERVO COM to th
6. condition by checking the machine speed and acceleration It then issues a VARON command If the machine is accelerating slowly this can cause the servo to be incorrectly engaged The normal interval between acceleration checks is 200ms This time can be increased in 50ms steps by ACCADJ RESERVED 1027 102f PLAY AND WIND PARAMETERS STARTUP 1030 display STARTU This is the number of frames taken for the machine to stabilise at play speed from stopped It is used to hold off the servo until we are sure the machine is running correctly it therefore is directly responsible for part of the lock time and as such should be set as small as possible consistent with good servo performance STOPW 1031 This is the number of frames taken for the machine to stop from play It is used in locates and chase to achieve accurate parking Each time the machine stops from play this parameter is adjusted by the kernel to achieve a more accurate park the next time MAXWND 1032 3 This parameter determines the maximum allowed wind speed when toggling It is usually set to a value that is greater than the maximum the machine can achieve but may be set lower by the user The format of this value is internal speed format ISF which is a 16 bit number where 0008 represents play speed and multiples are corresponding multiples of play speed MINWND 1034 5 This parameter represents the minimum speed at which reasonable toggle performance may be maintaine
7. 2600 protocol a e 1 8 KERNEL processor 1 7 access to parameters 3 2 Key teste sasie eere maie wi Pe Eus 2 3 address decoding i 222111 1 8 EEDA SS cuo v Ex doslo e haan 2 3 battery backed RAM 1 7 locate parameters 3 14 battery voltage low 4 5 LTC reader aaa 1 23 bi phase signals 1 14 machine cable selector test 2 9 Cable s hay Od BA aeo PR 1 16 machine data parameters 3 27 chase parameters 3 14 Machine interface 1 12 circuit description 1 1 1 28 Machine Parameter Menu 3 2 clock generator 45 machine parameters 3 1 3 28 command and tally interface 1 12 machine selector resistors 1 16 command outputs test 2 3 microprocessor and support 1 3 command parameters 3 18 mixed code operation 1 26 command routine pointers 3 20 Motorola M6809E processor 1 3 comms CTC test 2 15 mute tl test 2 17 COMMS decoding 1 8 paged ROM 0002 1 7 COMMS processor 1 8 parallel command routines A 1 COMMS processor tests 2 14 parameter protection 3 2 comms RAM test
8. 27 28 29 2A 2B 2C 2D 2E 2F 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F varoc4 fcricO rcricO rplyc1 ferlc1 rcric1 varoc5 rcinc1 rcotcO Ifdfc1 Ifdoc1 ferlc2 rcric2 rplyc2 rhinc1 rcotc1 varoc3 stopc2 rcinc3 stopc3 reca80 stopa80 fewcla pl stp urec124 rewc3 fewc3 varo6 fcrl DC rcrl DC toggc3 Ifttog playa80 servo enable with dead zone forward crawl JVC6600 reverse crawl JVC6600 reverse play JVC6600 forward crawl SONY 5000 reverse crawl SONY 5000 servo on JVC BR6600E S relay on assert pin 8 record assert pin 3 hold play short stop assert pause edit continuous pin 6 on de assert above continuous pin 6 off forward crawl BVU800 assert pin 7 reverse crawl BVU800 assert pin 7 and 6 reverse play BVU800 assert pin 6 rehearse OTARI assert pins 1 3 and 7 record out JVC8250 assert pin 8 servo on JVC 8250 S relay on assert pin 6 stop command JVC S relay off assert pin 2 play then record for Sondor Libra stop command for Sony 5630 record command for the Studer A80 stop command for the Studer A80 JVC search forwards command without using servo relay Unrecord for Lyrec Frida issue Stop Play together Unrecord with a short stop pulse assert rewind line pin 4 output SWNDMX to dc servo no servo relay assert forward line pin 4 output SWNDMX to dc servo no servo relay output nomply to DC servo energise servo relay crawl forward crawl rewin
9. Direct Record Line to eliminate serial delays for consistent punch ins Communicating over the ESbus RS422 port is the exclusive job of the COMMS processor Figure 18 shows a block diagram of this part of the ES 2 U44 is a 84C42 dual serial control chip which drives U4A to transmit on ESbus A and U4B to transmit of ESbus B The RTSA and RTSB lines from U44 are used to enable the transmitters onto the ESbus U4D and U4C can transmit onto the ES 2 receive bus to allow a chase master to send messages to other ES 2s on the bus Enabling these transmitters is done via the DTRA and DTRB lines from U44 All transmit enable lines are active high Bus A Dual Serial Comms ilo microprocessor q chip Bus B f enable Figure 18 COMMS processor ESbus interface The KERNEL processor is responsible for all of the control signals on the ESbus ports Figure 19 shows a block diagram of the KERNEL processors contribution to the ESbus interface The timeline bus is driven by the signal TLRATE generated by CTC3 straight into U5C and USD for ESbus A and B respectively FPGA MCN outputs the bus enable lines busen1 and busen2 U12A and U12B receive the bus A and B s timeline respectively the outputs of which are switched by the FPGA MCN to provide the ES 2 with its timeline TLSYNC The TLext line is driven by FPGA SUPPORT through an open collector inverter U17B and U17D for bus A and B respectively The TLext line is held low if a ES 2 is
10. ER A NL NEUE Ae A RUE 1 14 film output test 2 4 2 5 Sony P2 protocol anan 1 8 FIRO generator ee eee 4 41 Sony serial Interface 5a doda nana n 1 17 firq offtest essen rs 2 20 Sony serial test 2 12 FM out test a 2 5 system block diagram 12 FM Servo ces en 445 system clock signals 1 5 FPGAS M a Pe env oi Na 1 2 tach direction test 2 9 frame input test 2 19 tach divider test 2 10 interface cable e 1 16 tach interface 1 13 tach parameters 3 9 Kernel Comms interface 1 10 tach speed test 2 10 KERNEL decoding 1 9 tally input test onen 2 3 Issue 1 1 1 Index SynchroNet ES 2 Service Manual tally interface 6 66 cca eee eas 1 12 tally parameters 3 16 test parameters 3 12 test software 2 1 2 20 timecode generator 1 23 timecode interface 1 23 timeline test 2 12 transport commands 1 12 unifilm parameters 3 22 user interface 1 18 welcome message 2 2 Zeta 3 protocol 1 8 1 2 Issue 1
11. Machine Rom contains all the sets of machine parameters currently provided by Audio Kinetics as well as some software routines for providing machine specific commands In operation the machine parameters modify the behaviour of the Kernel Rom which performs all the generic functionality of the ES 2 This document is intended to describe these parameters and give some details of their use but it is assumed that the reader is familiar with current tape machine technology and with interfacing requirements The parameters are described in the order they appear in the ES 2 display editor Gaps have been left between logically grouped parameters to allow for future expansion Only six characters are used in the ES 2 display so where this differs from the full software label the display name is given at the right of the page The parameters are organised into 12 groups as follows SERVO PARAMETERS TACH PARAMETERS PLAY AND WIND PARAMETERS TEST PARAMETERS LOCATE AND CHASE PARAMETERS TALLY PARAMETERS COMMAND PARAMETERS COMMAND ROUTINE POINTERS UNIFILM PARAMETERS SERVO CONTROLLED WIND SERIAL COMMUNICATIONS CONTROL MACHINE GENERAL DATA Issue 1 3 1 MACHINE PARAMETERS SynchroNet ES 2 Service Manual Access to Parameters To access the Machine Parameter Menu Press the MENU key to display the Menu Select Menu from the Normal Display Press the MACH softkey The Machine Menu will be displayed Press the PROG softkey The Machine Param
12. SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION The Kernel controls the basic frequency of the servo by pre setting a 24 bit servo generator inside the FPGA DECODE FMSRC is the output and will be 200Hz when the generator is set to 40000 or 9C4016 FMSRC is fed into the FPGA MCN where it is converted into 400Hz pulses The servo path then splits into two parts Film machine and DC FM servo 1 Film machine The film machine path goes through an enable gate and into a switch which selects between tach and direction and bi phase The signals are then fed to an output buffer which can be enabled disabled 2 DC FM servo For the FM DC path the 400Hz pulses are fed into the servo phase locked loop whose output plfilmB is 89 times it s input serv 400 This is fed back into FPGA MCN where it again splits into two FM path and DC path 2a FM Servo Forthe FM servo the PLFILMB signal is fed into a programmable divider which is controlled by software The parameter svodiv is used to program this divider The output of the divider is the FM signal which goes to the parallel machine control port An open collector FM signal is also provided via U23 2b DC Servo The DC servo is a little more intricate The PLFILMB signal is converted to a pulse width modulated PWM signal which is the DC output of the FPGA MCN For a nominal servo generator value of 40000 or 9C4016 the mark space ratio of the signal DC is approximately 50 50 When the
13. The following screen is displayed while this test is running Checking TlExt and Mute lines Test 26 The processor interrupts are enabled and the tlext line is toggled high and then low and the processors interrupt is disabled If no drecon interrupt was received then the processor will display the following and wait for the user to press the re run key key 3 when the test will be repeated or the continue key key 4 to run the mute test TIExt on Bus A faulty re run gt Test 26 Press to continue gt The mute test follows the same pattern as the tlext test If no drecon interrupt is received when the mute line is toggled then the following is displayed Mute on Bus A faulty re run gt Test 26 Press to continue gt Issue 1 2 17 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual Both tests are performed on bus B ifthe bus B s tlextline fails then this screen will be displayed TIExt on Bus B faulty re run gt Test 26 Press to continue gt or if bus B s mute line fails then this screen will be displayed Mute on Bus B faulty re run gt Test 26 Press to continue gt If both busses pass the test then the following is displayed and the continue key must be pressed to enter the test select screen Checking TlExt and Mute lines Test 26 Press to continue gt TEST 27 serl m c This test requires three dongles which loop back the various transmit lines into the receive lines on the machine and diagnostics port
14. and the ES 2 will wait for the continue key key 4 to be pressed before returning to the test select menu The re run key key 3 will run repeat the whole test 2 18 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE kernel SIO OK re run Press to continue As the ES 2 has both RS422 and RS232 standards available on the serial control port the test should be repeated with the alternative test dongle plugged into the control port TEST 28 frme i p This test requires the the parallel machine connector dongle detailed in Appendix A in order to provide a signal generated by the film circuitry for the sync inputs to detect The user has to connect the sync in BNC test plug to the ES 2 video in socket The display shows the following screen during this test Checking frame sync input and busses Test 28 The 1 12 sets up the film interface to tach and direction started and enabled The servo relay is turned off The servo generator is set to 100Hz in order to generate 50Hz on the FILMA output CTC interrupts are enabled and timer2 of CTC1 is reset The hardware is set up to receive its reference from the pulse decoder The processor s interrupts are enabled for a specific time and the number of interrupts is counted If an incorrect number of interrupts were counted then the following screen is displayed Frame signal not reaching re run gt CTC1 direct Press to continue gt The signal is routed to the ESbus
15. contain a number that causes a particular command routine to be run The byte table is as follows NULL 1080 no action clear command PLAY 1081 play command STOP 1082 stop command CRAWLS 1083 crawl stop REC 1084 record in command UNREC 1085 record out command CRAWLR 1086 crawl rewind command CRAWLF 1087 crawl forward command RPLAY 1088 reverse play FWD 1089 forward wind command REWIND 108a rewind command TOGG 108b assert toggle mode REHEARSE 5108c rehearse command display REHEAR LACE 108d lace load the tape UNLACE 108e unlace unload the tape LFTDFT 108f defeat the tape lifters LFTOFF 1090 release tape lifters VARON 1091 enable varispeed mode VAROFF 1092 disable varispeed mode PAUSE 1093 pause command EDIT 1094 post stop command SERVO 1095 perform the servo function RECSEL 1096 record track selection LOCATE 1097 cue to a given position JOGR 1098 step one frame backwards JOGF 1099 step one frame forwards UNREH 109a take machine out of rehearse S_PLAY 109b release machine to external syncs If this parameter is zero then VAROFF will be used INIT 5109c This command is sent when a machine file has just been loaded or in a reset sequence Z Commands marked with an are only used by serially controlled machines 3 20 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS RESERVED 109d 109f Appendix A is a list of the current parallel command routines and Appendix B is a li
16. contain the correct three characters then a message is passed to the kernel and the test is terminated The kernel displays the following screen and pressing the re run key key 3 will start the test from the beginning while pressing the continue key will enter the test select screen Comms SIO faulty re run or ESbus A bad Press to continue If the Bus A test passes then the test is repeated on Bus B If this fails then the following screen is displayed Comms SIO faulty re run gt or ESbus B bad Press to continue gt If both busses pass the test then the following is displayed Comms processor checking ESbus SIO Test 24 Okay Press to continue gt TEST 25 ram msgs For this test the kernel tells the comms to wait for a specific time while the kernel fills up its fifo with 512 bytes The following is displayed while this is happening Sending messages to comms processor Test 25 When 512 bytes have been written to the fifo the kernel will read the fifo s full flag and if it does not register full then the following is displayed FIFOl does not report re run gt full Press to continue gt After the timeout the comms processor will empty the fifo Pressing the re run key key 3 will start the test from the beginning while pressing the continue key key 4 will enter the test select menu and tell the comms to exit this test If the fifo does register full the the following message will be displayed while the kern
17. currently the timeline master i e itis driving the timeline bus The FPGA SUPPORT is able to read the TLext line of both busses to determine if there is a timeline master on the bus If a unitis requested to become a timeline master when there is already one present then the message TIMELINE MASTER CONFLICT will be displayed and the attempt will be aborted Issue 1 1 25 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual The Timecode bus can be driven by U16A and U16C for bus A and B by the signal TCDIG from the generator these are enabled by FPGA SPLIT U12C and U12D receive the timecode bus of bus A and B respectively The frame bus receivers of bus A and B are U11C and U11D respectively The signal can be used to reference the timeline and timecode generator Each ES 2 has the capability of driving the frame bus however there is currently no facility for activating the drivers in an ESbus system USA and ABBE are the frame bus drivers of bus A and B respectively The ESbus mute lines are generated by open collector inverters U17A and U17C for bus A and B respectively FPGA SUPPORT can read the state of the ESbus mute line via buffers U29C and U29D for bus A and B respectively The drecon lines are active low signals and are buffered by U22B and U22C It is fed into FPGA SUPPORT which switches through the signal of the selected bus The sense of the line is converted to generate the KERNEL processor interrupt line idrecon Mixe
18. if the corresponding command line is connected The bits are defined as bitO play command bit 1 stop command bit2 record command bit3 forward wind command bit4 rewind command bit5 pause edit command bit6 rehearse command bit7 lifter defeat unlace command CONCMD 1071 If a command must be held continuously until the next command is issued then the corresponding bit in this byte should be set to a one CMDINV 1072 Commands are usually activated by a momentary closure of the output relay If a bitis set to 1 in this byte then the command will be changed to a momentary opening of the corresponding command relay The momentary action may be modified as described above by CONCMD CMDTIM 1073 This byte determines how long a command relay closure will last measured in 20ms steps Because of the asynchronous nature of command issuing there will always be an inaccuracy of up to 20ms The value in CMDTIM represents the minimum time that a command will be maintained DEADZ 1074 After a command time has finished this parameter determines how much time should elapse before another command may be issued This is to stop a machine seeing two separate commands so close together as to be interpreted as a single multi press command Measurement is in 20ms steps CYCLE 1075 When toggling the wind commands using TOGTYP 0 each command is issued for its CMDTIM time A period is left between the commands which is determined by this pa
19. processor As discussed at the start of the test software section the comms processor is requested to enter its test routines when the test software initialises The comms LED should flash twice to indicate that it is waiting for a command from the fifo There are 4 standard error screens associated with the comms kernel processor interaction rather than the tests themselves In these error screens pressing the re run key key 3 attempts to re run the previous test and pressing the continue key key 4 will continue with the test or return to the test select menu as appropriate 1 If the kernel has waited for a message from the comms which has not arrived then the following screen will be displayed Timeout waiting for re run COMMS response Press to continue 2 If the kernel processor received data from the comms which did not match anything it was expecting then the following screen will be displayed Bad data received re run from COMMS Press to continue 3 If the Comms processor received data from the kernel which did not match anything it was expecting then the following screen will be displayed Bad data was received re run by COMMS Press to continue 4 If the Kernel processor attempts to send some data to the comms and fails because the fifo reports it is full then the following screen is displayed FIFOl is reporting it re run gt is full Press to continue gt 2 14 Issue 1 SynchroNet ES 2 Service Man
20. servo frequency is decreased the mark space ratio also decreases This signal can be inverted by software control for machines which require the opposite polarity The PWM DC signal is converted to a DC voltage by U13 a frequency to voltage converter shown on sheet 5 The relationship between the output of the V F converter and the servo frequency is shown in figure 10 The precise shape of this curve is dependent on the resistor capacitor and Vcc tolerances of an individual ES 2 and so Figure 10 should only be taken as a guide The output of the V F converter is fed into the reference of a D A converter half of U9 a dual D A converter This part of the D A has the effect of multiplying the reference signal by the value in the D A converter This value is the GAIN parameter from the machine file The second half of the D A converter is setto the value ofthe parameter OFFSET from the machine file It is used to adjust the zero point of the DC swing Both of the D A outputs are fed into a summing amplifier U2 along with a 10V reference which has the effect of inverting the sense of the output The output of this amplifier drives the DCout line which goes to the parallel machine connector Issue 1 1 15 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual The DCout voltage follows the characteristic shown in the equation DCout 2 orFsET CAN 975 39 vF 10 256 256 N lt U13b pin 7 gt lt a Where
21. shared with the KERNEL ROM KA16 KERNEL RAM The KERNEL microprocessor s RAM U53 sheet 1 is a battery backed up 62256 which is a 32Kbyte RAM The RAM occupies only 16k of address space and so 50 of the RAM is unused A MAX791 U50 sheet 6 provides supervision of the battery backup It automatically switched the RAM s supply BVCC between the main supply and the battery when the 5V supply falls below 4 65V It also disables the chip select line BBRAM at this point to prevent spurious writes to any RAM location KERNEL EEPROM Toallow the user to select hard reset defaults there is a 512 byte EEPROM on the program module U1 The EEPROM used is a National Semiconductors 24C04 NOTE some manufacturers have different pin outs for this chip which contains an I2C interface The FPGA SUPPORT generates the two control lines a clock signal EE C and a bi directional data line EE D These signals are only active when the microprocessor is communicating with the EEPROM Issue 1 1 7 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual COMMS processor RAM ROM and CTC The COMMS microprocessoris solely responsible for dealing with the protocol translation between the ESbus ports and the KERNEL microprocessor Currently the ES 2 COMMS can communicate using AK ESbus dialect SONY P2 protocol Zeta 3 and 2600 protocols COMMS ROM U4 on the program module is a 27C256 occupying 32Kbytes in the address space The COMMS RAM
22. tach of below 70Hz Division rates of O or 1 will cause the divider to be bypassed This parameter is updated by the Calibrate function If the most significant bit of this byte is set to 1 then calibrate will not change the divide rate selected but will count the tach rate at the given division ratio The maximum division rate is 1F 31 decimal Z When calibrate is performed the parameters are updated with the measured integer tach rate but internally an accurate representation of the tach frame relationship is stored Issue 1 3 9 MACHINE PARAMETERS SynchroNet ES 2 Service Manual CODESPD 1025 This flag allows for machines where there is no tach signal and the frame speed of the timecode is not a true representation of the machines speed e g the Fostex D20 If this flag is set to non zero then the machine speed is calculated from the rate of change of the Selected Tape Code position This is not quite as good as normal tach or timecode speed measuring but proves adequate for such obscure cases The change in position is measured every 8 frames of the timeline On a machine where serial position data is available this parameter is used to prevent Itc being used except when the machine is known to be running at play speed This overcomes situations where machines output stationary or bursts of code while stopped and winding ACCADJ 1026 When a machine with a resolving servo is used as a chase master the ES 2 detects a play
23. the reason for failure will be displayed using the available space left on the display THE TESTS TEST 00 Welcome Running this routine will display the welcome message on the screen TEST 01 CRCs This routine checks the CRC of page 4 of the KERNEL ROM With the software running up to this point it would be a bit of a surprise if this test failed however if the CRC check fails the following will be displayed and the test software will halt The test EPROM fails the CRC test TEST TERMINATED If the KERNEL EPROM passes it s CRC check then the MACHINE ROM s CRC is checked If the ES 2 finds no valid MACHINE ROM pages the the following will be displayed and the test software will halt Machine EPROM fails the CRC test TEST TERMINATED If the ES 2 finds a valid MACHINE ROM page with an incorrect CRC then the following will be displayed and the test software will halt Machine EPROM faulty or not fitted TEST TERMINATED If these tests pass then the following screen is displayed and the user should press key 4 in order to return to the test select screen Checking CRCs Test 01 Okay Press to Continue 2 2 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE TEST 02 keys This test asks the user to press each key in turn When the requested key is pressed the ES 2 will ask for the next key in the sequence to be pressed When all keys have been pressed in sequence and read by the ES 2 the test will have pass
24. the units are ISF PLAY SPEED 0008 10be is the speed a machine will be jogged and is related the machine s dialect DIRTYPE 10bf display DIRTYP When DC servo wind is required to be a continuous sweep of control voltage from MAX reverse speed to MAX forward speed then this value should be non zero In this case SWNDOFF should be adjusted for the zero speed condition Bit 7 of this parameter controls whether minimum voltage is max forward or max reverse speed RESERVED 10c0 10cf 3 24 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS SERIAL COMMUNICATIONS CONTROL SERIAL 10d0 If this flag is set to non zero then the serial machine control port is enabled BAUD 10d1 This byte is used by the ES 2 to set the baud rate and number of stop bits as follows bits 3 0 baud rate 0000 50 0001 109 2 0010 134 58 0011 150 0100 300 0101 600 0110 1200 0111 1800 1000 2400 1001 3600 1010 4800 1011 7200 1100 9600 1101 19200 1110 38400 bit 5 stop bits 0 one stop bit 1 two stop bits e g Sony machines talk at 38 4k baud with one stop bit This parameter is setto 000011102 or 0e FORMAT 10d2 The ES 2 does not use this parameter the serial port setup is derived from the dialect DIALECT 10d3 This value determines the dialect spoken 00 Sony 01 Studer 02 Ampex 03 Studer ESbus TIMEOUT 10d4 This value determines the comms timeout measured in 5ms steps and is specified by the machine s communic
25. timer 1 going reads in the timer value after a delay and checks that the counter has actually started It it has not then the following screen is displayed Timer X re run gt counting error Press to continue gt If either test fails then pressing the re run key key 3 will start the test from the point which failed and continue through the tests If the continue key key 4 is pressed the the CTC test is exited If all timers pass the tests then the following screen is displayed and the ES 2 will wait for the continue key key 4 to be pressed Timers check Test 06 Okay Press to continue TEST 07 film lo In orderto see the film output the parallel test connector dongle is required forthis test The two film LEDs should be observed The routine displays the following screen Film output LEDs should be showing Test 07 bi phase Press if okay The film outputs are set to bi phase started and enabled The servo generator is set to approximately 4Hz This should result in a bi phase output of 1Hz The ES 2 will continue to output the bi phase until the continue key key 4 is pressed 2 4 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE TEST 068 film hi In orderto see the film output the parallel test connector dongle is required forthis test The two film LEDs should be observed The routine displays the following screen Bi phase should be running faster Test 08 Press if okay The film outputs ar
26. to be switch off to route the filmA signal to the sony_clk line The ES 2 displays the following screen during this test Checking Sony serial output Test 21 The ES 2 sets the film outputs to tach and direction enabled and started The servo generator is set to 800Hz and the data pattern 555516 is loaded into the Sony serial shift register The tach circuitry is set to tach and direction and the divider an X2 function disabled The processor interrupts are enabled for a given time and the number of tach interrupts is counted If the number was out of range then the following screen is displayed Sony serial out failed re run gt with data 55 Press to continue gt 2 12 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE Pressing the re run key key 3 will run the test again while pressing the continue key key 4 will run the next part of the test For the next part of the test the ES 2 will change the data to f0f016 and re run the test If this part of the test fails then the following is displayed Sony serial out failed re run gt with data f0 Press to continue If the test passes then the following screen will be displayed and pressing the continue key key 4 will return to the test select menu Checking Sony serial output Test 21 Okay Press to continue gt Issue 1 2 13 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual COMMS TEST ROUTINES Tests 22 23 and 24 are all associated with the comms
27. voltage of 0 to 5v is generated from a nominally 9600Hz servo This voltage may be given a range and offset as determined by the following GAIN and OFFSET parameters GAIN 100a This parameter sets the range of the DC servo output up to a maximum of 10v The ES 2 software recognises that dc servo is in use by a non zero value in this parameter OFFSET 100b This parameter introduces an offset into the DC servo output such that 00 gives 10v 80 gives Ov and FF gives 10v Appendix C suggests a method for adjusting the Offset parameter for a release servo machine The TEST parameters 1040 104f contain useful methods for manually experimenting with values for SLOLIM NOMPLY FSTLIM GAIN and OFFSET NEGSVO 100c This parameter allows inversion of the DC servo sense If itis zero then the DC servo is increased for increasing speed If the parameter is non zero then the DC servo is decreased for increasing speed REVSVO 100d This parameter is set to a non zero value if the machine speed can be controlled while playing backwards RESERVED 100e Issue 1 3 5 MACHINE PARAMETERS SynchroNet ES 2 Service Manual MAXSTP 100f 10 The required servo value is calculated 5 times each frame of timecode This parameter sets the maximum amount by which the servo may be adjusted each time thus limiting the slew rate of the servo output This is important if the machine speed is to track the servo output accurately This paramet
28. 10 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION FIFO read FIFO empty Background FIFO not end empty Construct Interpret message All message chars A received FIFO empty FIFO write Background Message AI tobe characters sent sent Write characters to FIFO Figure 6 FIFO software diagram FIRQ generator The FIRQ line on a 6809 microprocessor is the second of three interrupt lines NMI and IRQ being the other two It is used in the ES 2 for scheduling various software routines including Polling the keys Tach timeout Diagnostic port processing Checking video periods FPGA SPLIT U38 contains the firq generator It simply counts the main system Q pulse and generates a low going pulse on the FIRQ line after 5ms The firq subroutine then cancels the low level by writing to a location which clears the output latch Issue 1 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual MACHINE INTERFACE The ES 2 machine interface is capable of controlling a wide range of audio video and film machines The circuitry for which can be split into the following sections Commands and tallies Tach interface Servo Serial machine interface Sony 5000 shuttle control Commands and Tallies Command command outputs relays servo nlo Kernel servo com y microprocessor servo n c 4 TPOL fpga SPLIT P9 tally OPTO inputs iso
29. AMDN This parameter controls the rate of change of the film output when changing from play to stop RAMPTRM 1029 This parameter controls the acceleration of the film ramps It specifies the number of frames taken to transit between full ramp rate and fixed speed If this parameter is set to 00 then a value of 4 is assumed NEWRAMP 10aa If this parameter is set non zero then an alternative film ramp algorithm is invoked This number is a single ramp factor which covers all four operating conditions of the above ramp factors This parameter works in the opposite direction to the original ramp factors i e larger number steeper ramp RESERVED 10ab 10af 3 22 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS SERVO CONTROLLED WIND RESERVED 10b0 SWNDMX 10b1 2 3 This 24 bit number determines the value placed in the servo register for maximum wind speed For a DC servo controlled machine the smallest fastest meaningful value is 00 48 00 SWNDMN 10b4 5 6 This 24 bit number determines the value placed in the servo register for minimum wind speed For a DC servo controlled machine the largest slowest meaningful value is 01 d4 00 SWNDGN 10b7 This byte determines the value placed in the DC servo gain register It is only applicable if DC speed control is selected using TOGTYP SWNDOFF 10b8 This byte determines the value placed in the DC servo offset register It is only applicable if DC speed control i
30. AMS NEVE SynchroNet ES 2 2000 AMS Neve plc own the copyright of all information and drawings contained in this manual which are not to be copied or reproduced by any means or disclosed in part or whole to any third party without written permission As part of our policy of continual product improvement we reserve the right to alter specifications without notice but with due regard to all current legislation Disclaimer The information in this manual has been carefully checked and is believed to be accurate at the time of publication However no responsibilty is taken by us for inaccuracies errors or omissions nor any liability assumed for any loss or damage resulting either directly or indirectly from use of the information contained within it Service Manual 527 194 Issue HEAD OFFICE AMS NEVE PLC BILLINGTON ROAD BURNLEY LANCS BBII 5UB ENGLAND TELEPHONE 44 0 1282 457011 FAX 44 0 1282 417282 LONDON OFFICE TELEPHONE 44 0 20 7916 2828 FAX 44 0 20 7916 2827 NORTH AMERICAN OFFICES AMS NEVE INC NEW YORK TEL 1 212 965 1400 FAX 1 212 965 3739 AMS NEVE INC HOLLYWOOD TEL 1 818 753 8789 FAX 1 818 623 4839 RUPERT NEVE CANADA INC TORONTO TEL 1 416 365 3363 FAX 1 416 365 1044 e mail enquiry Qams neve com http www ams neve com SynchroNet ES 2 Service Manual Contents CIRCUIT DESCRIPTION Introduction MICROPROCESSOR AND SUPPORT KERNEL Processor RAM
31. IRQ frequency too high re run gt Press to continue gt In both cases pressing the re run key will repeat the test while pressing the continue key key 4 will return to the test select menu If the correct number of interrupts were received then the screen will show Checking FIRQ line Test 29 Okay Press to continue gt TEST 30 EEPROM This test checks the EEPROM on the program module for functionality It fills up the EEPROM with data and attempts to read it back While the test is running the following screen will be displayed Checking EEPROM Test 30 If the data read does not match the data written then the screen shows EEPROM failed to save restore re run data Press to continue Pressing the re run key key 3 will repeat the test again The continue key key 4 will return to the test select menu If all is OK with the EEPROM then the screen shows Checking EEPROM Test 30 Press to continue Pressing the continue key key 4 returns to the test select menu 2 20 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS MACHINE PARAMETERS Introduction This document applies to Kernel ROM v1 08 and machine ROM v5 04 The ES 2 machine interface may be configured to work with a wide range of Audio Video and Film as well as virtual machines Optimum performance may be obtained from widely different machines by careful adjustment of a set of machine parameters accessible via the ES 2 display The
32. U37 LTC reader chip BLACK HOLE expansion slot U21 Tally buffer U25 Command latch U31 LED latch U9 DC servo DAC U39 control ports U38 control ports U36 control ports 1 9 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual FFFF C000 8000 4000 0000 Figure 5 KERNEL processor memory map Diagnostic port The ES 2 diagnostic port is a general purpose RS232 serial port which allows the ES 2 to communicate with a PC Half of the SIO U49 is used for the diagnostics the other half for serial machine control A 75155 RS232 transceiver is used to convert TTL levels to RS232 The diagnostic port communicates at 9600 baud with no parity 8 data bits and 1 stop bit A list of commands will be displayed when a followed by return is received Kernel Comms interface The KERNEL and COMMS microprocessors communicate with each other by two uni directional First In First Out buffers FIFOs The circuit diagrams show 2 MK4501 FIFOs FIFO1 U40 routes messages from the COMMS to the KERNEL while FIFO2 U41 is concerned with sending messages from the KERNEL to the COMMS There are two hardware status lines generated by each FIFO which inform the processors when each FIFO is either full or empty Both processors read these lines via buffers inside the FPGA SUPPORT The KERNEL and COMMS processors have the same software to read and transmit to the FIFOs a state diagram is shown in Figure 6 1
33. ach rates by up to 32 times Issue 1 1 13 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual There are 2 tach outputs from the FPGA SPLIT A direction signal TDIR which is read by the tally buffer U21 and the tach signal ITACH ITACH is used for the following A reference for the 5 x tach phase locked loop The 5 x tach signal is used for locking a tach locked machine to an equivalent 5 x system reference TL5 An input to the KERNEL CTC to measure the period of the tach The tach interrupt to the KERNEL microprocessor ITACH is a active low latched pulse which is cleared by the tach interrupt Servo The servo section of the ES 2 hardware has several different functions Provides an FM or DC signal to be used for servo locking or shuttling the machine Generates bi phase or tach amp direction signals to control a film machine Provides the necessary signals to read the machine cable identification resistors Tally WE dual buffer comparator DCout Output Conditioning Kernel microprocessor plilmA Phase FM o c locked fpga MCN loop NE NENNT Fm Programmable serv 400 divider nr c DECODE SCLK 3 Servo generator biphase ie pulse Pama ama a se EHSRC generator nee E pa Pag gt Figure 9 Servo A block diagram of the servo circuit is shown in Figure 9 1 14 Issue 1
34. alculated as p SVODIV Thus with SVODIV set to 2 and NOMPLY 9C40 we get the usual 9600Hz FM servo output SLOLIM 1000 1 2 This 24 bit number determines the slowest speed at which the ES 2 will attempt to make the machine run in external speed control The number is a measure of the servo period and so the larger it is the slower the machine will run NOMPLY 1003 4 5 This 24 bit number determines the nominal play speed for machine under external speed control It may be modified by the kernel to reflect the speed at which the machine last locked to the timeline FSTLIM 1006 7 8 This 24 bit number determines the fastest speed at which the ES 2 will attempt to make the machine run in external speed control 3 4 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS SVODIV 1009 The nominal FM output may be divided by any integer between 1 and 256 using this parameter This allows many of the more usual FM servo frequencies to be generated while maintaining the resolution in the max min servo parameters For example with a value of 9C40 in NOMPLY we can generate the following servo frequencies MACHINE SERVO Frequency SVODIV MCI 19 2 kHz 1 MTR90 9 6 kHz 2 STUDER B67 3 2 kHz 6 Other servo frequencies may be generated by changing the values of NOMPLY SLOLIM and FSTLIM with SVODIV selected to keep the resolution in the servo count as high a value as is practical The third servo output type is the DC output A DC
35. and ROM COMMS processor RAM ROM and CTC MACHINE INTERFACE USER INTERFACE References Timecode interface AK ESbus Interface ES 2 TEST SOFTWARE THE TESTS COMMS TEST ROUTINES MACHINE PARAMETERS Introduction Access to Parameters Resetting Default Parameters SERVO PARAMETERS TACH PARAMETERS TEST PARAMETERS LOCATE AND CHASE PARAMETERS TALLY PARAMETERS COMMAND PARAMETERS COMMAND ROUTINE POINTERS UNIFILM PARAMETERS SERVO CONTROLLED WIND SERIAL COMMUNICATIONS CONTROL MACHINE GENERAL DATA APPENDIX A List of Real Parallel Command Routines in ROM APPENDIX B List of Real Serial Command Routines in ROM APPENDIX C Adjusting OFFSET 100b on a DC servo video machine INDEX Issue 1 1 1 1 3 1 6 1 7 1 10 1 16 1 18 1 21 1 23 2 2 2 14 3 1 3 2 3 3 3 4 3 8 3 11 3 12 3 14 3 16 3 18 3 20 3 21 3 23 3 24 A 1 B 1 C 1 Contents SynchroNet ES 2 Service Manual Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION CIRCUIT DESCRIPTION Introduction The ES 2 synchroniser is a multi processor machine controller capable of interfacing with ATR VTR and film machines as well as several forms of controllers The ES 2 has two AK ESbus ports each of which contains an RS422 communications port The ESbus ports carry the Timeline a system wide reference signal a TLext line to indicate presence or absence of a timeline signal a frame bus used to distribute a video s
36. and received T_IFUP 1049 Update an Information field to the comms T_LTC 104a Number of frames of good consecutive monotonic values of Itc required to establish Good code after a drop out If this parameter is set to 0 then a default value of 3 is used T_GEN 104b Number of incoming erroneous frames before a jamming generator will re jam If this parameter is set to 0 then a default value of 5 is used T_SYS 104c Manual setting for system standard 01 24 fps 02 25 fps 03 30 fps 13 drop frame A hard reset should be performed to clear the effects of using this parameter Setting bit 7 of this parameter will prevent the Itc reader from updating the machine standard Using bit 7 for this purpose does not require a reset to clear its effects T_SPD 104d 4e As machine speed increases provided that there is a tach signal available the ES 2 Itc reader is switched off to avoid processor overloading This parameter can be used to override the default speed at which this takes place 5x play speed Units are ISF T_SYNR 104f Synchronisation tests bitO Pulse the unlace lift defeat relay on timeline second boundary bit1 Pulse the rehearse relay on machine second boundary Issue 1 3 13 MACHINE PARAMETERS SynchroNet ES 2 Service Manual bit2 Move Evertz SSL serial timecode back by 2 frames Screensound version 4 LOCATE AND CHASE PARAMETERS TOGGW 1050 During locate or chase functions the l
37. ariable on 4D serial variable off 4E serial servo 4F serial rehearse command 50 serial reverse play 51 serial edit 52 serial lifter defeat 53 serial lifter off 54 serial crawl stop 55 serial record track selection 1 byte 56 serial locate jog forward 57 serial locate jog rewind 58 serial initialise absolute locate 59 serial clog timer enable 5A serial clog timer disable 5B serial locate 1 frame 5C serial locate relative offset SF serial edit on 5E serial edit off 5F serial position request 60 serial step on 1 frame 61 serial step back 1 frame Issue 1 B 1 APPENDIX B SynchroNet ES 2 Service Manual 62 63 64 65 66 67 68 69 6A 6B 6C 6D 6E 6F 70 71 72 73 74 75 76 TT 78 79 TA 7B 7C 7D Le TF 80 B 2 serial servo using 25 command serial variable on with col field set serial stop with col field reset serial col field reset serial record track selection 2 bytes serial record track selection 8 bytes serial forward wind or variable wind maxwnd serial rewind or variable wind maxwnd serial varon with colour field 2 serial unrehearse serial forward at 5x speed with laced check serial rewind at 5x speed with laced check serial pause and unrehearse serial test for record then stop play serial Nagra T s play serial Nagra T s varon serial stop delayed colour reset serial record track selection masking TC channel bit 1 byte serial edit off with delay serial pause then stop after a d
38. ast stage may be a toggle into park or a toggle ahead of playing master reference this parameter represents in binary frames the size of the window within which fixed speed toggling takes place This parameter should be set large enough to accommodate the toggle stopping window TSTOPW PLAYW 1051 During locate or chase functions the last stage may be a play into park this parameter represents in binary frames the size of the play into park window PRKERR 1052 This parameter in binary frames represents the allowed error in parking the machine If the machine stops outside this window it will attempt to repark It may attempt to repark up to PRKJOG 105d times before abandoning the job it will then leave the machine where it stands STRTFRM 1053 display STRTFR Usually the machine is parked ahead ofthe timeline position and when the timeline starts to run this value represents in signed binary frames the correct difference between machine and timeline to issue the play command to the machine It is adjusted by the kernel on each play to achieve a faster lock time next time A value of 5 frames means the play command should be issued when the timeline is equal to the machine position 5 frames Positive values may be used whereupon the play command is not issued until after the timeline has passed the machines position This can compensate for those machines which start with a boost causing them to travel at faster than play speed
39. ate is performed A film machine will use this value to determine its equivalent timecode standard Film rate This parameter should be set to zero if no tach signal is present TCHDIR 1021 When reading the direction line of the machine this flag allows an inversion to be applied before the kernel decides on the direction of tape motion If the direction line is high for forwards and low for backwards then this flag should be FF if the direction is vice versa then this flag should be zero Calibrate updates this parameter TCHTYP 1022 If this flag is zero then the hardware is set for a tach dir signal if non zero then itis set for a bi phase tach When a bi phase tach is in use the phases should be connected however the user feels and let calibrate sort out the correct value for TCHDIR above This parameter is updated by calibrate TCHFRM 1023 Some machines generate their tach signal from a control track striped on the tape e g video machines in which case it is nearly always frame based and as accurate as timecode can be If this is the case then this flag may be set to the number of tach pulses per frame The ES 2 will set its tach divider to this number giving an accurate frame rate signal which can replace timecode as a lock source TCHDIV 1024 This parameter determines the division rate of the tach hardware and at present will be set to a power of 2 by the calibrate function The software will aim to get a play rate
40. ations protocol JOGTYPE 10d5 display JOGTYP This parameter is zero for the standard ES 2 crawl command or non zero if the machine has a jog command implemented In this case the commands JOGR JOGF are used Issue 1 3 25 MACHINE PARAMETERS SynchroNet ES 2 Service Manual LOCTYPE 10d6 display LOCTYP This parameter is zero for the standard ES 2 locate command or non zero if the machine has a locate command implemented In this case the command LOCATE is used 01 7 standard absolute locate 02 relative offset locate T POSN 10d7 This is the byte sentto the machine when requesting a tach timer position If this parameter is set to ff then no requests for this information are transmitted L POSN 10d8 This is the byte sent to the machine when requesting an LTC position If this parameter is set to ff then no requests for this information are transmitted V POSN 10d9 This parameter is not used by the ES 2 SCYCLE 10da This is the number of 20ms steps in between status requests to the machine The status information contains tally and locate status If this parameter is set to ff then no requests for status information are transmitted Care should be taken that values for SCYCLE and PCYCLE below are not be set low enough to cause the ES 2 processor to be slowed down in carrying out normal machine control duties PCYCLE 10db This is the number of frames in between position requests to the machine If this parameter is s
41. chine goes above 8 x play speed and turns them back on when the machine falls below 5 x play speed This threshold can be altered with the parameter t spd see machine parameter description for further details The LTC gate array also provides the frame rate signal FSYNC which can be used to lock the generator or timeline signal to MACH reference The signal ITCR5F is a 5 x frame rate signal which is used for servoing LTC irq Electronically Analogue DAK010 Kernel balanced to TTL Timecode microprocessor LTCA X conversion reader iTCREF Reference Figure 16 LTC reader Timecode generator The timecode generator can be switched to output 1 of 3 selections Generated code under processor control Timecode from the ESbus timecode bus A or B Reshape the incoming LTC Figure 17 shows a block diagram of the timecode generator Issue 1 1 23 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual ESBus interface B2cod TCGA stability Electronically 177 balanced output reference TCGB Kernel microprocessor shift Analogue register conditioning clear a enable TLTC a eder fpga SUPPORT Sion L Figure 17 Timecode Generator The main generator circuitry is situated inside U39 the FPGA SUPPORT The generator clock is generated by a phase lock loop U30 locked to the TCGREF signal which is generated by CTC3 This clock TCGX2 is used to clock data onto a s
42. chines cannot keep up with this rate of update so it may be slowed down by reprate If this parameter is set to be non zero then each servo access will be followed by REPRATE accesses being missed out e g if REPRATE is 4 then the servo will be updated once per frame do 1 miss out 4 DFACTOR 1016 display DFACTO This parameter is set for the machines deceleration characteristics when in external speed control The larger this number is then the earlier the servo will decelerate the machine as it approaches lock This parameter should be set as small as possible consistent with minimum overshoot it is only for the case where the machine is lagging and therefore decelerating into lock see below DFLEAD 1017 Ithas been found that the characteristics of machines differ under deceleration and acceleration so this parameter provides the same function as DFACTOR but for when the machine is leading and needs to accelerate up to lock 3 6 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS FINEMIN 1018 9 display FINEMI When the servo has attained lock using the parameter MAXSTEP the amount by which the servo is changed each update is reduced to the value of FINEMIN This parameter should be as small as possible consistent with holding lock The parameter is measured in the same units as NOMPLY A good machine should hold lock with FINEMIN set to 1 thus allowing a flutter value of less than 0 003 added This parameter is not use
43. d toggle command not using pause line lifter defeat which toggles play command for Studer A80 Commands 40 to bf are reserved for serial commands CO C1 C2 A 2 ffa80 rewa80 rcinc4 deactivate PAUSE then assert FF deactivate PAUSE then assert RW energise SERVO relay then assert RC Issue 1 SynchroNet ES 2 Service Manual APPENDIX A C3 C4 C5 C6 C7 C8 c9 ca rcotc4 fewc4 rewc4 toggc4 stopc4 toggc5 playc3 rcinc2 release SERVO relay then assert PL issue STOP then DC servo controlled forward wind issue STOP then DC servo controlled rewind issue STOP then DC servo controlled toggle disconnect servo relay then STOP assert pin 2 after deadz toggle using pause line but not FWD amp RWD lines no servo relay action assert play line twice record then play record Commands marked ft are complex and designed specifically for the SONY 5000 range of machines As such they are of little use for other machines Call the AMS Neve Customer Support Department if you need details of what they do Issue 1 A 3 APPENDIX A SynchroNet ES 2 Service Manual A 4 Issue 1 SynchroNet ES 2 Service Manual APPENDIX B APPENDIX B List of Real Serial Command Routines in ROM 40 serial play 41 serial stop 42 serial record 43 serial unrecord 44 serial forward wind 45 serial rewind 46 serial lace 47 serial unlace 48 serial pause 49 serial null 4A serial jog forward 4B serial jog rewind 4C serial v
44. d The kernel will not attempt to control the wind speed of the machine below this value It is in ISF units 3 10 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS TOGWND 1036 7 During a chase to playing master with the machine approaching from behind it must toggle ahead and then stop to wait for the correct play point When the machine gets within the toggle window TOGGW it will use this speed to toggle ahead of the master reference It is in ISF units CWRAMP 1038 9 This parameter determines the slope of the deceleration curve for locate chase performance The larger this number is then the steeper the deceleration curve is and consequently the machine braking is applied later This parameter should be set as large as possible consistent with minimal overshoot TOGERR 103a b When the controlled wind is toggling the machine to maintain a fixed speed this parameter determines an error window around the required speed such that if the machines speed is within this window the toggle will be equal between the two wind commands to maintain speed Only if the machine speed goes outside of this window will one or other of the wind commands be missed out to allow acceleration deceleration The parameter is in ISFormat for ease of use by the kernel software but it is likely to be in the range of about 0004 to 0008 TOGERR should not be set higher than MINWND Some machines respond better if the toggled commands are a wind co
45. d Code Operation Difflock In order to operate in mixed code mode the ES 2 references a phase locked loop to the ESbus timeline signal tl 600 which is a system standard square wave The phase locked loop U33 multiplies this signal up to 600Hz a common multiple of 24 25 and 30 FPGA MCN divides down the 600 Hz by a rate controlled by software to provide a signal which matches the machine standard FPGA MCN selects the timeline TLSYNC between the 2 busses and the difflock output U32 generates the 5 x timeline signal TL5 which is used for servoing FPGA MCN generates a signal tl irg which is used to interrupt the KERNEL processor It is a low going signal on the falling edge of the timeline which is cleared when the processor services the timeline interrupt 1 26 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION Item is repeated for Bus B Timecode TCDig a bus D RS422 Timecode i f B1COD generator Kernel microprocessor Mute fpga SUPPORT detector TLext Drecon A Divider Drecon B Timeline m PL3B Bus A cx i f Timeline m Bus B RS422 am Frame Programmable divider locked TLsync TLrate m m SSU ref B Bus A RS422 Bus B Hs IN if if SSU ref A reference Figure 19 Kernel processor ESbus interface Issue 1 1 27 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual 1 28 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE
46. d on serially controlled machines VHOLDOFF 101a display VHOLDO In the case when we have released a video machine from external speed control its position may be jumping around a bit while it settles down to the external video syncs This parameter should be set to hold off any servo difference checking while this settling takes place It is measured in servo accesses see REPRATE If this parameter is set to its maximum value of FF the servo is released and not re engaged until the machine has been stopped and started again this allows the user to examine the difference display to see how far the machine jumps when released LETGO 101b This parameter is the number of subframes away from lock that a video or release digital audio machine will release to external reference If setto zero then the default of 25 subframes for a video machine and 00 for a digital audio machine will be used The units are subframes expressed as a hex number TAKE 101c This parameter is the number of subframes that video or release digital audio machine when released will be allowed to drift out before the ES 2 servo is re engaged If set to zero then the default of 50 subframes will be used If set to FF then the servo will never re take whatever the error The units are subframes expressed as a hex number When this parameter is set to zero and the machine has successfully released then the retake window widens gradually to 1 frame This caters for
47. desired number The parameter name after the full stop should display the reguired name Z The first two digits of the address cannot be changed They are fixed as 10 3 2 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS To change the value of a machine parameter Press the DIGIT scan softkey to position the cursor on the digit that you wish to change on the right hand side of the sign gt Press the and softkeys to increment or decrement the digit The message next to the LOAD softkey will change from ok to press Press DIGIT scan again if you wish to change the other digit and use and to change the value gt Press the LOAD softkey The new value will be saved and the LOAD message will change back to ok Resetting Default Parameters To restore the original machine parameters Access the Machine Menu Press the LOAD softkey The parameters for the displayed machine file will be reloaded from ROM Issue 1 3 3 MACHINE PARAMETERS SynchroNet ES 2 Service Manual SERVO PARAMETERS The servo system uses a 24 bit number to set the output frequency of a programmable divider There are three possible servo outputs for a machine these are FILM FM and DC For a given SERVO VALUE the frequency of the FILM output is 8000000 VALUE For a tach dir output or half this for a bi phase output More about FILM output later The frequency of the FM output is c
48. detailed in Appendix A The diagnostics dongle tests the diagnostics port while the RS422 serial dongle and the RS232 serial dongle tests the two standards available on the serial machine control port The first part of this test initialises both ports to 38 4kBaud 8 data bits even parity and 1 stop bit DTR and RTS are set inactive and the SIO interrupts are enabled The following screen is displayed while this test is running Checking machine control SIO Test 27 The processors interrupts are enabled and an ASCII string is transmitted on the serial machine control port After a delay the interrupts are disabled and the receive buffer checked for characters If the ASCII string was not correctly received then the following screen will be displayed Machine control SIO re run gt faulty or missing Press to continue gt Pressing the re run key key 3 will repeat the serial control port test while pressing the continue key key 4 will run the diagnostics port test The diagnostics port test follows the same pattern as the serial control port test The screen displayed while this test is running is as follows Checking diagnostics SIO Test 27 If this test fails then the display will show Diagnostic SIO re run gt faulty Press to continue gt Pressing the re run key key 3 will repeat the diagnostics test while pressing the continue key key 4 will return to the test select menu If the test passes then the following is displayed
49. e SERVO NO for this test to work This routine sets the film output and the tach input to bi phase It then toggles the film output s direction and checks that the tach direction read changes If the tach direction does not match the film direction the the following screen is displayed and the user is asked to re run the test key 3 or continue with the next test key 4 Tach dir out to in re run gt failed Bi phase Press to continue gt The next test sets the film output and tach input to tach and direction It again toggles the film direction output and displays the following screen if the tach input does not match what was expected Tach dir out to in re run gt failed Tach Dir Press to continue gt The software will then wait until the continue key key 4 is pressed to enter the test select menu or the re run key key 3 to restart the test from the beginning If the test passes the screen will show Checking Tach dir out to Tach dir in Test 16 Okay Press to continue gt Issue 1 2 9 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual TEST 17 tach spd This test requires the parallel machine connector dongle in order to loop the FILMA and FILMB outputs to the TACHA and TACHB inputs The routine energises the servo relay to switch the FILMA onto TACHA The ES 2 sets the servo generator to 400HZ sets the tach and film circuits to operate with tach and direction then enables and starts the film outputs The
50. e and perform an unlaced wind if the difference to be made up is greater than this value The ability to lace or unlace the tape is reflected in the command bytes LACE 108d and UNLACE 108e This value is in BCD minutes and seconds i e only use digits in the range 0 9 minutes in 1057 and seconds in 1058 LTIME 1059 a display LTIME When a video machine is locating or chasing and the tape has previously been unlaced as described above then it will attempt to reduce the difference below this value before it will lace the tape up again Conditions apply as for ULTIME it is also BCD minutes and seconds i e only use digits in the range 0 9 PRKWND 105b c During a chase or locate operation when the machine gets within the toggle window it will use this speed to toggle into park ahead of the master reference It is in IS Format If this parameter is set to 0 then the value of MINWND will be used for this operation PRKJOG 105d Maximum number of attempts to get within PRKERR 1052 ofthe locate target When parameteris set to 0 the default value of 3 is used SVOWIN 105e This sets the number of frames away from lock that the machine must be before the servo system causes a chase operation to be started in order to rejoin the timeline If this parameter is set to zero then a default value of 80 frames 50hex or 3secs 5frames 25fps is used Units are binary frames RESERVED 105f Issue 1 3 15 MACHINE PARAMETERS SynchroN
51. e set to bi phase started and enabled The servo generator is set to approximately 16Hz This should result in a bi phase output of 4Hz The ES 2 will continue to output the bi phase until the continue key key 4 is pressed TEST 09 film stp In orderto see the film output the parallel test connector dongle is required forthis test The two film LEDs should be observed The routine displays the following screen Bi phase should be going on and off Test 09 Press if okay gt The film outputs are set to bi phase and enabled The servo generator is set to approximately 16Hz This should result in a burst of 4Hz bi phase output which will stop at each of the bi phase states in turn The ES 2 will continue to output this pattern until the continue key key 4 is pressed TEST 10 film t d In orderto see the film output the parallel test connector dongle is required forthis test The two film LEDs should be observed The routine displays the following screen Now output is tach and direction Test 10 Press if okay The film outputs are set to tach and direction started and enabled The servo generator is set to approximately 16Hz This should result in a tach rate of 8Hz with the direction line changing state every two seconds approximately The ES 2 will continue to output tach and direction until the continue key key 4 is pressed TEST 11 FM out This routine displays the following screen Check that the FM out is sweeping with T
52. ed and the test select menu is automatically entered The following screen is displayed at the start of the test Press the key marked Test 02 Menu When the ES 2 detects a key press then it displays the name of that key on the right hand side of the The ES 2 will remain waiting for the requested key to be read TEST 03 LEDs This routine displays the following screen Check the lower row of LEDs are cycling Test 03 Press if okay gt The ES 2 will light each of its KERNEL LEDs in turn starting on the left had side of the program module with the Bus ON LED and ending on the switch board with the GOOD CODE LED The LEDs will cycle in this way until key 4 is pressed TEST 04 cmd o ps In order to see the command relays active the parallel machine connector dongle detailed in appendix A is required for this test This routine displays the following screen Check the command outputs are cycling Test 04 Press if okay This test energises each command relay briefly in turn The associated LED on the command outputs of the parallel machine connector dongle should light in turn The routine will continue running until key 4 is pressed TEST 05 Tally s The parallel machine connector dongle detailed in appendix A is required for this test It provides a path from the command relays outputs to the tally inputs The test first sets the tally polarity by setting the TPOL line high Itthen briefly energises each the command re
53. ee flashes Processor is running in the main loop The COMMS processor spends the vast majority of it s time waiting for instructions from the KERNEL processor The COMMS LED therefore is flashing twice for most of the time Once the initialisation is complete then the following welcome screen is displayed Welcome to the 1 12 Test Software Press to continue Pressing key 4 will enter the test software and the test select screen will be displayed There is a standard layout for the test routine screens The middle of the top line displays the action being taken or requested while the extreme left and right text describes the function of key 1 and key 3 The left hand text on the bottom line displays the number of the currently selected test and the centre of the bottom line displays the selected test routines name The bottom right of the display gives the function of key 4 In the test select screen the OK key Key 1 runs the currently Issue 1 2 1 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual selected test Key 2 is inactive UP key 3 and DOWN key 4 select the test routine Key 2 is inactive OK Choose test required UP Test 00 Welcome DOWN The keys are not active while the test software is being executed When atest is completed and passed the user will be asked to press key 4 to continue If a test fails then pressing key 3 will re run the test while key 4 will continue with the test routines An indication of
54. el waits for a specified time The Comms checks that the correct data was read from the fifo The following will be displayed during this part of the test 2 16 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE Waiting for comms to interpret data If the data read from the fifo by the comms at this point then the kernel displays the message Re run will start the test again from the beginning while continue will enter the test select menu Bad data received re run from COMMS Press to continue If the data read by the comms was OK then the comms fills up its fifo with data and the kernel reads and checks the data The kernel displays the following screen during this part of the test Reading data from comms fifo If the comms has filled up its fifo and the fifo does not register full then the kernel is told and the following is displayed FIFO2 does not report re run gt full Press to continue gt If the data from the comms checks out then the following screen is displayed and the kernel waits for the user to press the continue key key 4 before displaying the test select menu Reading data from comms fifo Okay Press to continue gt TEST 26 muteltl This test requires the the 15 way Bus A and Bus B ESbus connector dongles detailed in Appendix A which diode ORs the tlext and mute lines into the drecon line The routine selects bus A sets the mute and tlext lines low and enables the drecon interrupt
55. elay serial initialise machine command serial record track selection command for VPR6 serial servo command for Ampex PR6 serial set play speed to 1xplay and issue play command serial varon command for Ampex VPR6 serial Studer track select serial rehearse mode on command serial servo using shuttle command with restricted servo range serial transmit offset and enable chase serial enable chase serial shuttle servo Issue 1 SynchroNet ES 2 Service Manual APPENDIX C APPENDIX C Adjusting OFFSET 100b on a DC servo video machine A video machine or any other type that uses a release servo mechanism does not use the dc servo when the machine is put into PLAY This makes it difficult to find the correct value for the offset parameter which can be critical to good lock times The following procedure can be adopted gt Make a note of the GAIN parameter 100a and then set it to 00 Make a note of the VAROFF parameter 1092 and set this also to 00 Put the machine ON LINE to a group or CHASE ON to a video referenced timeline Play the group or the chase master gt Select the ES 2 difference display gt Adjust the value of OFFSET until the difference display stops incrementing This value will be correct for your machine gt Replace the GAIN and VAROFF parameters to their original values Issue 1 C 1 APPENDIX C SynchroNet ES 2 Service Manual C 2 Issue 1 SynchroNet ES 2 Service Manual Index
56. er is not used on serially controlled machines VIDEO 1011 Video machines are not held in external speed control but are pulled into lock and then released to lock to external video syncs If this parameter is zero then the machine is always held in external speed control to hold lock If itis non zero then the machine is pulled into lock held there for VIDEO Servo accesses and then the servo is released See REPRATE 1015 for an explanation of servo accesses VIDJMP 1012 When a video machine is released from external speed control to lock to external video syncs the tape may jump In orderto achieve a stable lock the ES 2 must pull the machine s position to a point thatis the correct number of frames from lock and then release the servo The machine should then jump the required amount into lock Those machines that do not have a repeatable jump characteristic cannot be used with the ES 2 system as video slaves NOSVO 1013 This parameter should be set to a non zero value FF if the machine cannot be controlled in external speed mode This parameter engages the use of Real Master mode in Eclipse or Remote Master mode in Penta if this mode is possible in the system NOWILD 1014 This parameter should be set to a non zero value FF if the machine should be held in external speed control mode for ALL play conditions REPRATE 1015 display REPRAT It was stated above that the servo output is updated 5 times per frame Some ma
57. erial line via a shift register The shift register interrupts the KERNEL processor every 8 bits which loads the next byte into the register with 1 level of buffering The processor can alter the path of the generator signal between the shift register and the LTC reader signal TLTC to generate TCDIG This signal is fed to the ESbus interface to drive the ESbus timecode bus if selected as master and also into FPGA SPLIT U38 along with the timecode from both ESbus timecode busses The processor can select which of these 3 signals drive the generator output The TTL generator signal TCRET is conditioned by U7 and converted to a balanced output by U19 Generator adjustments VR2 is used to adjust the phase locked loop for maximum stability VR1 adjusts the slew rate of the generator which should be setto 12 5ms for SMPTE or 50ms for EBU code generation VR6 on the program module adjusts the output level of the generator 1 24 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION AK ESbus Interface The ES 2 communicates with controllers and other ES 2s over 1 of 2 ESbus ports Bus A or Bus B Both busses have the following features RS422 serial comms ports Timeline bus to distribute a system wide reference square wave TLExt line open collector line to indicate the presence of a timeline master Timecode bus to distribute a system wide timecode stream Frame bus to distribute a system wide video locked square wave Drec a
58. ess to continue gt The 1 12 sets the servo generator to 400Hz and waits until the okay key key 4 is pressed The test engineer can then set up the servo phase locked loop for minimum jitter Pressing the continue key key 4 allows the engineer to set up the 5x tach phase locked loop The parallel machine connector dongle is required for this test The ES 2 sets the film output to tach and direction enables and starts the film output The tach circuitry is set to tach and direction and the divider is enabled and set to 7 Tach interrupts are enabled and the ES 2 waits for the user to press the continue key displaying the following Setup the 5x tach phase lock loop Press to continue gt When the user presses the continue key key 4 the ES 2 disables tach interrupts sets the DC gain to 0 and the DC offset to 128 The DCout signal should be OV plus errors due to component tolerances The screen shows Check the DC offset Press to continue gt When the user presses the continue key key 4 the ES 2 sets the DC gain to 128 and the offset to 0 The DC out should be close to the 12V rail The following screen is displayed Check the DC gain Press to continue gt Pressing the continue key returns to the test select screen Issue 1 2 11 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual TEST 20 timeline The ES 2 runs four checks for this test and displays the following screen Checking timeline input and diflock Tes
59. est 11 a scope Press if okay gt The ES 2 sets the servo generator to 400Hz output starts and enables the film output and sets the output for tach and direction The servo divider is then used to sweep the frequency of the FM output in the following manner The divider is set to two for 2 5 seconds a frequency of 17 9Khz approx is output The divider is incremented every 30ms until 7 seconds later it is set to 256 The divider remains set to 256 for 2 5 seconds outputting a frequency of 137Hz This pattern is continually output until the continue key key 4 is pressed Issue 1 2 5 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual TEST 12 DC out This routine displays the following screen DC Servo out is ramping 10 up to 10 The ES 2 sets the servo generator to 400Hz sets the DC gain to 128 and the initial DC offset to 0 The DC offset is then continually incremented up to 256 and decrements down to 0 This results in a sawtooth wave form with a period of approximately 100ms and a voltage range of approximately 10V as shown in Figure 1 BV div 20ms div Figure 1 DCout Sweeping offset The pattern is continually output until the continue key key 4 is pressed 2 6 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE TEST 13 servo a This routine displays the following screen DC Servo out is ramping 6 up to 6 Test 13 May be clipped Press if okay gt The ES 2 sets the DC offset to 128 w
60. et ES 2 Service Manual TALLY PARAMETERS AVTALS 1060 Each of the top four bits of this byte should be set to 1 if the corresponding tally is connected The bits are defined as bit4 MACHINE IN RECORD bit5 MACHINE RECORD ENABLED bit6 END OF TAPE bit7 GENERAL USE TALINV 1061 If a connected tally is active low the corresponding bit in this byte should be set to a one FLSHTL 1062 If a connected tally is expected to flash for a required function then the corresponding bit in this byte should be set to 01 FLSHPRD 1063 display FLSHPR If any tallies are expected to flash then this parameter should set the flash period approximately measured in 20ms steps NEGTAL 1064 The tally interface is usually expected to work from a positive voltage source If a machine works from a negative voltage then this parameter can be set to non zero to configure the inputs to work in this way SERTAL 1065 A value of 01 in this parameter indicates the tallies come across the serial link A value of 02 does not use the serial record tally A zero indicates the usual parallel tallies EOTACT 1066 This parameter determines the action of the ES 2 when an end of tape tally has been received Non zero will force the ES 2 to go OFF BUS Zero will cancel all processes and stop the machine without taking the synchroniser OFF BUS RESERVED 1067 The following parameters determine idealised tallies to report to the kernel The idea
61. et to ff then no requests for position information are transmitted When a machine is calibrated PCYCLE is set to 1 in order to get position reports every frame The machine file value is retained and restored whenever the module is reset This requires a new calibrate RESERVED 10dc BREAK 10dd This parameter should be non zero if the machine requires a break character to begin communications SVOTYP 10de This number indicates the type of servo used to synchronise the machine 00 Normal parallel FM or DC servo 01 Serial SERVO command used until released to external reference VIDEO 02 Serial servo command used continuously bit7 No varoff if chase master EVTLKO 10df This is the number of frames that serial commands are suspended before an event This is to guarantee that the serial link will not be busy when the command need sending 3 26 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS MACHINE GENERAL DATA NAME 1060 to 10f3 This 20 character string is displayed to tell the user what machine he has It should be set so that the first 12 characters make a complete name for the NORM display The remaining 8 characters give any extra information for the MACHINE display EOT 10f4 This is the end of text byte for the above name string RESERVED 10f5 RSPMAP 10f6 10f7 This parameter is ANDed with the response to a device type request before a search of subfile is made RESPON 10f8 10f9 T
62. eter Menu will be displayed Access to the Machine Parameter Menu will not be allowed if parameter protection is ON To turn off parameter protection Press the MENU key to display the Menu Select Menu from the Normal Display Press the LOCAL softkey The Local Setup Menu will be displayed gt Press the OPT softkey The Local Options Menu will be displayed Press the STEP softkey until the Parameter protection option is displayed Press the OnOff softkey to turn Parameter protection off The message next to the LOAD softkey will change from ok to Press Press the LOAD softkey The change will be saved and message next to the LOAD softkey will change back to ok Repeatedly press the MENU key until the display returns to the Menu Select Menu or the Normal display as required Or gt Press the MODE key to return directly to the Normal Display The Machine Parameter Menu displays a four digit hexadecimal address with an followed by the two digit hexadecimal value stored at this address This is followed by a full stop and the name of the parameter To select a machine parameter gt Press the DIGIT scan softkey to position the cursor on the last digit of the address Press the or softkeys to change that digit to the desired number gt Press the DIGIT scan softkey to move the cursor to the third digit of the address gt Press the or softkeys to change that digit to the
63. for a brief period before settling down PRK AHD 1054 display PRK AH This is the number of frames a chasing machine will stop ahead of a stopped master reference It should be large enough to accommodate STRTFRM described above but not so large as to delay the synchronous play of the system WNDLAGF 1055 display WNDLGF When the machine is chasing this parameter defines how much to lag behind a forward moving master The algorithm to define the number of seconds to follow behind the master is WNDLAG WNDLAG 8 16 where master speed is in multiples of play speed masterspeed WNDLAGR 1056 display WNDLGR Same as WNDLAGF but for a reverse moving master When setting the wind lag factors there is a worst case condition for each For the forward moving system the worst case is a master which stops instantly so that the slave has to wind down to a controlled stop without going too far past the stopped master position For a backward moving system the worst case is for a master to drop instantly into play the slave must decelerate to stop ahead of the master ready for a synchronous 3 14 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS play command Any overshoot in either of these cases causes an untidy and unacceptable performance These parameters are best set in conjunction with CWRAMP described earlier ULTIME 1057 8 display ULTIME When a video machine is chasing or locating it will attempt to unlace the tap
64. frame bus of bus A and the test is repeated If an incorrect number of interrupts are received then the following screen is displayed Frame signal not reaching re run gt CTC1 via bus 1 Press to continue Pressing the re run key will repeat the above test while pressing the continue key key 4 will continue with the next test The signal is then routed to the ESbus frame bus of bus B and the test is repeated If an incorrect number of interrupts are received then the following screen is displayed Frame signal not reaching re run gt CTC1 via bus 2 Press to continue Pressing the re run key will repeat the above test while pressing the continue key key 4 will continue return to the test select menu If all tests passed then the following screen is displayed and the user should press the continue key key 4 to display the test select menu Checking frame sync input and busses Test 28 Okay Press to continue TEST 29 firq off This test simply enables the processors FIRQ interrupts for a given time and counts the number of interrupts received with is the time During the test the ES 2 displays Issue 1 2 19 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual Checking FIRQ line Test 29 If the number of interrupts was below the number expected then this screen is displayed FIRQ frequency too low re run gt Press to continue gt If too many interrupts were received then this screen is displayed F
65. hich should set the DCout signal to operate around OV The initial DC gain is set to 256 and the servo generator is set to an initial frequency of 400Hz The servo generator frequency is then continually swept up to a frequency of 3 24kHz and the down to 245Hz This results in a form of distorted sine wave with a period of 266ms and a voltage range of 6V as shown in Figure 2 2V div 50ms div Figure 2 servo a sweeping frequency Issue 1 2 7 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual TEST 14 DC out b There are two halves to this test The first displays the following screen DC Servo out is ramping 0 down to 10 Test 14 May be clipped Press if okay gt The ES 2 sets the DC offset to 128 to set the DCout to operate around Ov with an initial gain value of zero The servo generator is set to a value of 800Hz The DC gain in then continually swept from 0 up to 256 and then back to 0 This results in a sawtooth wave form with a period of 105ms and a voltage range of 0 to 7V as shown in Figure 3 This pattern is continually output until the okay key key 4 is pressed when the second half of the test is entered This test will display the following screen DC servo out is ramping 0 up to 5V Press if okay gt The ES 2 changes the servo generator to output a frequency of 200Hz The gain is then cycled round in the same way as above The results are a sawtooth wave form still with a period of 105ms
66. his parameter gives the response of the machine to a device type request If parameter sersel is non zero and the response matches this parameter then the subfile is loaded SERSEL 10fa If this byte non zero then a device type request message will be sent to the machine after a reset If a response can be matched to a subfile then that subfile is loaded MCNTYPE 10fb display MCNTYP This byte contains the type of machine 1 Audio Tape Machine 2 Video Tape Machine 3 Film Machine 4 Digital Audio Machine 5 Digital workstation The kernel software makes many decisions based on this parameter so it is important to set it correctly CSUM 10fc This byte is reserved for the kernel to keep a checksum of the file while it is held in RAM SUBFILE 10fe display SUBFIL This byte is reserved for the number of any subfile that has been used to modify the main file FILE 10ff This byte contains the file number of the particular machine that is in use It is this number which is matched to the cable number read at power up Issue 1 3 27 MACHINE PARAMETERS SynchroNet ES 2 Service Manual 3 28 Issue 1 SynchroNet ES 2 Service Manual APPENDIX A APPENDIX A List of Real Parallel Command Routines in ROM Parallel Command Description Assert means momentary or continuous depending on the setting in CONCMD Continuous means continuous regardless of the setting of CONCMD S relay is the servo relay available on
67. ies so that the microprocessor always reads high for an active tally Tach interface The ES 2 can read bi phase or tach and direction across a wide range of speeds Each time the ES 2 is calibrated the tach rate is compared with the timecode and a tach divider is set up unless disabled by the machine file top bit of tchdiv set to receive a tach rate as close to 1 pulse per frame as possible Figure 8 shows a block diagram of the tach circuitry The circuit diagrams show the tach analogue conditioning the tach phase locked loop and the FPGA part ofthe tach circuit biphase tach amp dir convertor Programmable up down counter divider Figure 8 Tach interface circuit There are 3tach inputs TACHA TACHB and TACH COM The TACH COM line goes to the parallel machine port to allow each interface to be wired to a potential suitable to the machine The TACHA and TACHB signals are buffered by U28 and fed into U26 a 4583 U26 is a schmitt trigger with RI4B and RIAC selecting the hysteresis The output signals TACH1 and TACH2 are fed directly into FPGA SPLIT Inside the FPGA SPLIT there are three sections The KERNEL can select the direction signal TDIR between the TACH2 signal tach and direction or the output of a bi phase to tach and direction converter bi phase tach There is a frequency doubler to increase the low frequency range There is a 5 bit divider counter to enable the ES 2 to divide down high frequency t
68. ignal is active low during a COMMS read cycle It is the BR W signal gated with BVMA and is used by the SIO chip U44 and the COMMS ROM on the program module Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION KERNEL Processor RAM and ROM The KERNEL microprocessor U48 is responsible for the following User interface Machine control Controlling ESbus signal routine Switching and measuring reference signals Controlling the timecode generator KERNEL and MACHINE ROMs The KERNEL s main ROM U2 on the program module is a 27C1001 or 27C010 depending upon the manufacturer A 27C1001 is a 1Mbit or 128Kbyte ROM but the 6809 can only address a maximum of 64K directly and sothe ROM is arranged into 8 pages of 16Kbytes The ROM s address selectlines AO A13 are generated by the KERNEL microprocessor while the top 3 address lines are generated by a latch within the FPGA SPLIT This latch decodes the ROM s chip select line KERN the KERNEL s data lines BDO BD2 and the R W line BR W and outputs the lines KA 14 KA_15 and KA 16 which are used to select the current page of the ROM When the KERNEL s program wishes to change page it simply writes the page number to a location in the ROM space The ES 2s MACHINE ROM is also a paged ROM currently a 27C512 although there is the capability for fitting 27C1001s in future The page selection of the MACHINE ROM is similar to the KERNEL except that the top address line is
69. ip IEFIFO1 1 locations U41 read from the KERNEL interface IEFIFO2 1 locations U42 write to the KERNEL interface ICOMSEL 2 locations U39 read FIFO flags and write to comms LED latch KERNEL decoding The KERNEL chip select lines are generated from the address lines BA7 through to BA15 and are either gated with the IBVMA or the E signal depending on the timing requirement of the device being selected Figure 4 shows this in the form of an address map For more information see the information on FPGA DECODE in chapter 2 The KERNEL chip select output signals are IROM 8x16K U2 on the program module a 27C1001 EPROM IMACH 8x16K U3 on the program module a 27C1001 EPROM IBBRAM 16K U53 a 62256 battery backed up RAM 50 used ISCOM 4 locations ICTC1 8 locations ICTC2 8 locations ICTC3 8 locations IBFIFO1 1 location IBFIFO2 1 location IICU1 2 locations IICU2 2 locations IINTA 1 location IVITC 16 locations ILTCR 8 locations IBHOLE 256 locations ITALLY 1 location ICMD 1 location ILED 1 location IDAC 2 locations ISUPPORT 10 locations ISPLIT 6 locations IMCN 4 locations U49 a Z84C42 serial interface chip U54 a 68B40 counter timer chip U55 a 68B40 counter timer chip U56 a 68B40 counter timer chip U42 read from the COMMS interface U41 write to the COMMS interface Master interrupt control unit Slave interrupt control unit IRQ source clear VITC expansion slot
70. is a 5x signal phase locked to the timeline These are the 2 signals used as a reference to servo the machine to During servoing the ES 2 takes account of the system and machine positions and attempts to adjust the machine s speed to bring the machine to within 1 frame of the system Once within 1 frame the signal SF5 is matched to TL5 to bring the machine into close lock The signals TL5 and SF5 both generate an interrupt and reset a counter inside a CTC The counter is used to time the phase of the signal Generated reference signals There are two generated reference signals are TLrate This is the timeline signal which can be distributed to the ESbus to provide a system wide reference TCGREF The timecode generator reference Both of these signals are generated by a CTC and can wither be synced in software to the signal VFRAME SFRAME or be free running XTAL reference TCGREF can also be synced to the timeline signal TLSYNC TLSYNC differs from TLRATE in that it is local to an individual ES 2 It can be driven directly by one of the ESbus timeline signals or be a phase locked derivative used for mixed code TLRATE however is solely used to drive the ESbus timeline when the RS422 buffers are enable i e the unit is a timeline master on that bus Issue 1 1 21 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual KERNEL Counter Timer Chips The kernel microprocessor has 3 68B40 counter timer chips CTCs which are used to time the
71. is a non backed up 6264 U42 on the circuit diagrams The COMMS CTC is a 68B40 timer counter chip U43 on the circuit diagrams and is used purely for event timing There are 3 timers inside a 68B40 and the COMMS CTC provides the following functions 1 Timer 1 interrupts every 10ms and is used for a Flashing the COMMS LED in emulate mode b Chase master message scheduling and chase master conflict timing 2 Timer 2 is used to measure the protocol s inter character timeout and break processing 3 Timer 3 is used to time the regular ESbus cyclic reports Address Decode All of the microprocessor address decoding is contained within the FPGA DECODE U37 and can be split between the COMMS and KERNEL processor s decode COMMS decoding FFFF 8000 7000 6000 5000 4800 4000 0000 Figure 4 COMMS processor memory map 1 8 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION The COMMS chip select lines are generated from the address lines EA11 through to EA15 and gated with the EVMA enable signal Figure 3 shows this in the form of an address map For more information see the information on FPGA decode under Kernel and Machine ROMs above The COMMS chip select output signals are IEROM 32K UA on the program module a 27C256 EPROM IERAM 8K U42 a 6264 non battery backed up RAM ISIO 4 locations U44 a Z84C42 serial interface chip IECTC 8 locations U43 a 68B40 counter timer ch
72. lators Tally buffer Figure 7 Command output and tally input Figure 7 shows a block diagram of the command and tally interface There are 8 command relays used for transport commands PLAY STOP RECORD FORWARD WIND REWIND PAUSE REHEARSE and LIFTER DEFEAT Each relay has a common reference CMDREF which goes to the parallel machine connector to allow each interface to connect the reference to a level suitable for the machine to be controlled An independent change over relay is provided for switching servo enable signals The KERNEL microprocessor controls the relays via a 74HC377 octal latch U25 the outputs of which drive the relays through an open collector driver The relay outputs are disabled during power up by Q2 The microprocessor enables them by setting the EN OP line low The servo relay K7 is separate from the command relays and is driven by the S RLY line generated by the FPGA SPLIT The ES 2 is capable of reading 4 tallies from the machine RECORD End of Tape RECORD ENABLE and spare Each tally input is fed into 2 opto isolators whose common go to the parallel machine connector to allow the ES 2 to read tallies of either sense The outputs of the optos can be read by the KERNEL microprocessor via the tally buffer U21 a 74HC374 also used to read the 1 12 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION tach direction and the machine cable resistors TPOL is used to invertthe sense ofthe tall
73. lays 0 through 3 and reads the tally input If the response is not what was expected then the following is displayed and the test fails Tally Input Failed Rerun Press to continue If the first part of the test passes then the TPOL line is inverted and the ES 2 checks that the data read from the tally latch has inverted If this is notthe case the the following is displayed and the test fails Tally Polarity Failed Rerun Press to continue Issue 1 2 3 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual If either of these tests fails then pressing the Rerun key key 3 will restart the test If the tests pass then the following screen is displayed Tally inputs Check Test 05 Okay Press to continue Afterthe test has been completed whether it has passed orfailed the ES 2 will continue energising the command relays and wait for the continue key key 4 to be pressed This is to allow some form of debugging to take place TEST 06 CTCs This test checks the three KERNEL counter timer chips CTC1 U54 CTC2 U55 and CTC3 U56 Each timer is tested in turn and each test consists of two tests 1 A check to see if the CTC chip is present All timers are stopped and preset The ES 2 reads the CTC and checks that the preset data is read back If the data is different to that expected then the following message is displayed Timer X faulty or re run gt not fitted Press to continue gt 2 The second check starts
74. lised tallies are defined as follows bits 0 3 are unused bit4 1 machine is in record bits 1 machine is record enabled bit6 1 machine is out of tape bit7 1 general use defined for specific machines 3 16 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS TAL1FLSH 1068 display TAL1FL This byte should be set to the idealised tally code to be reported when tally 1 record is flashing TAL1ON 1069 This byte should be setto the idealised tally code to be reported when tally 1 record is on solid TAL2FLSH 106a display TAL2FL This byte should be set to the idealised tally code to be reported when tally 2 record enable is flashing TAL2ON 106b This byte should be set to the idealised tally code to be reported when tally 2 record enable is on solid TAL3FLSH 106c display TAL3FL This byte should be set to the idealised tally code to be reported when tally 3 end of tape is flashing TAL3ON 106d This byte should be set to the idealised tally code to be reported when tally 3 end of tape is on solid TAL4FLSH 106e display TALAFL This byte should be set to the idealised tally code to be reported when tally 4 is flashing TAL4ON 106f This byte should be set to the idealised tally code to be reported when tally 4 is on solid Issue 1 3 17 MACHINE PARAMETERS SynchroNet ES 2 Service Manual COMMAND PARAMETERS AVCMDS 1070 Each of the bits of this byte should be set to 1
75. lows Issue 1 1 5 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual 1 6 CLK E2 IBVMA BR IW IBW IBR ER W IEW IER 4MHz clock Used by the ESbus and machine SIO chips U44 and U49 1MHz clock Used as timer references for the KERNEL CTCs U44 U45 U46 2MHz clock The main KERNEL microprocessor clock U48 2MHz clock The KERNEL microprocessor address strobe signal 2MHz clock The KERNEL microprocessor s valid memory address signal It is used by the FPGA DECODE as a gating signal for certain peripheral chip select lines Signal generated by the KERNEL microprocessor to allow peripherals to distinguish between a read and write cycle This signal is active low during a KERNEL write cycle It is the BR W signal gated with BVMA and is used by the SIO chips U49 This signal is active low during a KERNEL read cycle It is the BR W signal gated with IBVMA and is used by the SIO chip U49 and the ROMs 2MHz clock The main COMMS microprocessor clock U44 2MHz clock The COMMS microprocessor address strobe signal 2MHz clock The COMMS microprocessor s valid memory address signal Used by the FPGA DECODE to gate certain peripheral chip select signals Signal generated by the COMMS microprocessor to allow peripherals distinguish between a read and write cycle This signal is active low during a COMMS write cycle It is the BR W signal gated with IBVMA and is used by the SIO chip U44 This s
76. main 5V line If the 5V supply falls below this threshold then the RAM is supplied from the battery and the chip select line BBRAM is disabled On powering up the MAX791 will disable the second chip select pulse if the battery voltage is below 2V If this is the case then the microprocessor recognises the missing access and displays the battery voltage low warning message Clock generator Systern clocks J S CLK 2CLK E2 KERNEL microprocessor clocks BVMA BRIW IBW COMMS microprocessor clocks pce E JEVMA BR W IEW IER Figure 3 ES 2 clock signals All system clock signals are derived from the main 16MHz clock S CLK which is generated by X1 The KERNEL and COMMS microprocessors are running on alternate phases Other than reducing clock skew there is no technical reason for this the processors operate completely asynchronously Figure 3 shows the relationship between clock signals and a description of the purpose of each clock signal fol
77. mmand determined by required direction and the stop command If this flag is set to non zero then the deceleration command will be a stop command TOGTYPE 103c display TOGTYP This number determines the type of wind speed control applied to the machine when toggling 0 normal wind command toggling 1 DC speed control from DC servo output 2 FM speed control from FILMA output 3 Control of machine speed by Serial Comms 4 alternative wind command toggling 5 normal wind command toggling with no DEADZ used 6 toggling using FM speed control and SONY 16 bit Serial Speed control types 1 2 and 3 are controlled by further parameters see later TSTOPW 103e This parameter serves the same purpose as STOPW but is measured from the machine toggling at PRKWND speed It is updated by the kernel in the same way as STOPW RESERVED 103f Issue 1 3 11 MACHINE PARAMETERS SynchroNet ES 2 Service Manual TEST PARAMETERS TESTIT 1040 This parameter allows an experienced ES 2 user to perform experimental writes to parts of the ES 2 hardware When this parameter is set to 48 ASCII H you may write directly to the command output servo control latch and servo dividers Parameters 1041 to 1045 are the values written to the hardware Alternatively with this parameter set to 53 ASCII S the diagnostic status screen will be enabled under the front panel mode button T SERV 1041 1043 This three byte value is the value poked int
78. n offered to the user by an Eclipse controller In a machine controlled by a Sony P2 dialect this is the number of bytes in the track selection command TRKNUM 107c This number represents the total number of selectable tracks available on the machine If bit 7 is set then each track will be selected individually when all tracks are enabled otherwise an ALL ENABLED message will be sent This is useful for Studer machines It is used by the record track selection command RECSEL on Audio machines TOGTIM 107d Some machines benefit from a faster action when using wind command toggle modes In this case a reduced command time can be set for toggling only Units are 20ms steps If this parameter is set to zero then toggling uses CMDTIM output pulse width UNREC P 107e It is normally considered safe practise to always copy an unrecord command to the attached machine even if it is not recording This protects against faulty machines broken wires etc When this parameter is set to be non zero the synchroniser will not respond to an unrecord command unless a record tally is present RESERVED 107f Issue 1 3 19 MACHINE PARAMETERS SynchroNet ES 2 Service Manual COMMAND ROUTINE POINTERS The ES 2 kernel has a logically defined set of commands which it may issue to the machine These logical commands are converted to the closest physical command that the machine is capable of performing by the following byte table Each entry should
79. nerating 2 reference signals There are 3 68B40 timer counter chips CTCs which measure generate these reference signals Figure 15 shows a block diagram of the reference signals DEN d ESBus interface Itach Machine interface tach Timecode interface generator fsync Timecode interface reader video Kernel microprocessor ipga SUPPORT Figure 15 Reference signals within the ES 2 The reference signals can be split up into 3 groups Machine reference signals Tach signal LTC signal The signal SFRAME is used when the MACH reference is selected for the timeline or generator reference The FPGA MCN switches between the frame rate ITACH signal and the LTC frame signal FSYNC depending on whether the machine is a tach or code locked machine Similarly PL1B is a 5x tach rate signal and LTCR5F is a 5x LTC signal and is switched to generate SF5 This signal is used for servoing the machine 1 20 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION External reference signals Video sync Square wave pulse Blackhole EXP for future expansion These signals are switched inside FPGA SPLIT to generate the signal VFRAME and reflect the VIDEO and PULSE selections for the timeline and generator reference settings System reference signal Timeline reference used to reference the generator Servoing a machine TLsync is the frame rate system reference TL5
80. nterface with an ESbus controller or other References Allowing a range of system reference options A large part of the ES 2s digital circuitry is contained within four Field Programmable Gate Arrays FPGAs These FPGAs have been named MCN SUPPORT SPLIT and DECODE The FPGAs are shown on the block diagrams as a dotted box with the associated FPGA s name 1 2 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION MICROPROCESSOR AND SUPPORT There are two Motorola M6809E processing units within the ES 2 The KERNEL processor controls the machine and provides the user interface The COMMS processor deals exclusively with the AK ESbus interface including ESbus and emulation modes The processors require the following conditions to run Low pulse on the reset line Halt line held high Clock signal E Clock signal Q leading E by 90 EPROM situated at the top of address space RAM available The processor part of the ES 2 circuit shown in Figure 2 can be split into the following parts Power monitor Clock generator Kernel processor RAM and ROM Comms processor RAM and ROM and CTC Address decoding Kernel Comms interface Diagnostics port Firq generator Issue 1 1 3 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual KERNEL EEPROM ROMS Program module Diagnotics idrecon Scom irq itach ito irq Interrupt birq control Kernel microprocessor RAM and ROM ame interrupts tlsync
81. o the 24 bit servo counter T GAIN 1044 This value is written to the gain control port of the DC wind servo hardware T OFFSET 1045 This value is written to the offset control port of the DC wind servo hardware T CMD 1046 This value is written to the command output of the ES 2 parallel machine port See the machine control board schematic bit O pin 1 play bit 1 pin 2 stop bit 2 pin 3 record bit 3 pin 4 forward wind bit 4 pin 5 rewind bit 5 pin 6 pause edit bit 6 pin 7 rehearse bit 7 pin 8 unlace lift defeat T CONT 1047 This value is written to the servo control latch bit O svopol servo polarity bit 1 film stop bit 2 fdir film direction bit 3 mode film output enable bit 4 tc bus enable 1 bit 5 servo relay bit 6 tally polarity bit 7 tc bus enable 2 3 12 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS T COMS 1048 Byte passed to Comms for debug purposes bitO Cancel emulator increments of time by 1 frame bit 1 ESbus time outs disabled bit2 Set alternate bus chase master Comms software revision 2 04 3 00 only bit3 Send EOL to Zeta controller bit4 Allow chase slave to follow external unit with same address bit5 Send timeline tick to comms when timeline master bit6 Sony emulator sends tl runs to kernel do not use chase master routines bit7 Emulator does not run timeline after a delay when play comm
82. or a reading the counter values after a period of time and checking that the value read is different from the one initialised If this test fails then a message is passed to the kernel and the test is terminated The kernel will display the following screen Comms processor CTC re run gt counting error Press to continue gt If the test fails on either of the above 2 points then pressing the re run key will start the test from the beginning pressing the continue key key 4 will enter the test select screen If the test passes then the kernel displays Comms processor checking its CTC Test 23 Okay Press to continue gt TEST 24 comms SIO Issue 1 2 15 ES 2 TEST SOFTWARE SynchroNet ES 2 Service Manual This test requires the the 15way Bus A and Bus B ESbus connector dongles detailed in Appendix A in order to loop the serial transmit back out to the serial receive The kernel will send a request to the comms processor to check its SIO and display the following screen Comms processor checking ESbus SIO Test 24 The comms processor then initialises both channels of the SIO chip for 38 4kBaud 8 data bits 1 stop bit even parity DTR and RTS inactive and the chip s interrupt is enabled The receive buffer in the comms RAM is cleared and the processor interrupts are enabled Three characters are transmitted on the A bus and the receive buffer is checked to make sure the same three characters were received If the characters did not
83. pins 11 12 and 13 of the machine connector S relay on means pins 12 and 13 connect S relay off means pins 12 and 11 connect 0 nullcO null 1 playcO play assert pin 1 2 stopcO stop assert pin 2 3 rcincO record play assert pins 1 and 3 4 rewcO rewind assert pin 5 5 fewc0 forward wind assert pin 4 6 IfdocO lifter on continuous set pin 8 7 IfdfcO lifter off continuous clear pin 8 8 varoc0 servo on S relay on 9 varfc0 servo off S relay off A toggcO toggle set toggle mode B fewc1 searchJVC S relay on assert pins 4 and 6 C rewc1 searchJVC S relay on assert pins 5 and 6 D varoc1 svo on JVC S relay on assert pins 4 and 6 E varfc1 svo off JVC S relay off assert pin 1 F rhincO rehearse assert pin 7 10 playc1 play JVC 8250 assert pins 1 4 6 11 varfc2 servo off JVC 8250 S relay off assert pins 1 4 6 12 rplycO reverse play assert pins 1 and 5 13 playc2 play command SONY 5000 7 14 stopc1 stop command SONY 5000 T 15 varoc2 servo on SONY 5000 t 16 varfc3 servo off SONY 5000 t 17 fewc2 forward laced wind SONY 5850 18 rewc2 rewind laced wind SONY 5850 t 19 nullc1 null command SONY serial T 1A toggc1 toggle command with SONY pause T 1B varfc4 TEST VAROFF COMMAND FOR 3324 1C lacec0 lace command for SONY 5000 t 1D unlacO unlacing stop for SONY 5000 T 1E editcO pause edit assert pin 6 Issue 1 A 1 APPENDIX A SynchroNet ES 2 Service Manual 1F 20 21 22 23 24 25 26
84. rameter in 20ms steps For some machines this parameter may be reduced to zero thus speeding up the toggling and giving a smoother wind performance RPTCMD 1076 With some machines repeat presses of the same command button give different functions If these functions are unwanted this flag may be set to a non zero value FF to stop the ES 2 from issuing the same command twice in succession 3 18 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS SVOPLY 1077 When synchronous play is required from stop the default action is to enable the servo and then issue the play command If this flag is set to a non zero value then the order is reversed to be play followed by servo enable If the parameter video is non zero and this parameter set to zero then only the servo enable command is issued SONYINV 1078 9 display SONYIN The Sony serial output is usually high with active low command bits If an active high command bit is required then the corresponding bit should be set in this word EVTADV 107a This value is a number of frames that is subtracted from an event time to determine when the event is sent It is used to account for the serial delays on a serially controlled machine VIDTRK 107b A non zero value in this parameter indicates the record track selection is of the type used by video machines This parameter controls the use of the Assemble Edit option in the Local Options Menu and the type of track selection scree
85. rocessor SWITCH BOARD Figure 13 Display interface The KERNEL microprocessor controls the display via 3 control lines and 8 bi directional data lines The display is not capable of running at the speed reguired by the microprocessor and so the correct signals are generated by U39 the FPGA SUPPORT The 3 control signals are DISP RS aregister select line Selects between a control and data register DISP EN an enable line The display is enabled when this line is high and the data is clocked on the falling edge DISP RW aread write pulse This signal is high when the microprocessor requires to read a byte from the display The switch interface shown in Figure 14 has 2 select lines and 8 read lines One select line EN SW enables the front panel switches and the other EN HEX enables the hex switch and links on the program module 1 18 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION PROGRAM MODULE Hex switch amp links lipga SUPPORT Er Kernel microprocessor fpga MCN Front panel switches SWITCH E ee cte BOARDS Figure 14 Switch inputs The switches are polled approximately every 20ms by the KERNEL microprocessor the keys are debounced in software Issue 1 1 19 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual References The ES 2 has 7 sources of reference to which the unit can reference and is capable of ge
86. rt This line selects which receive line is decoded by the serial chip For RS232 the SEL line is tied to OV and for RS422 the SEL line should be left open Figure 11 shows a block diagram of the serial port Sony serial Sony 5000 series video machine such as the guite popular 5850 reguire a serial stream to control shuttle mode The machine outputs a clock signal with a sync waveform every 16 bits The ES 2 buffers the clock waveform with U22F and converts the sync sguare wave to a high going pulse every rising edge The ES 2 outputs a high going edge during the bit number 13 to command the machine to enter shuttle mode No other commands are used by the ES 2 Figure 12 shows ablock diagram of the Sony serial interface Feen Sony clock Sony Pulse m Kernel shaper a microprocessor sync register p S ony out fpga SUPPORT L Figure 12 Sony serial interface Issue 1 1 17 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual USER INTERFACE The ES 2 displays information via a set of dedicated LEDs on the program module and switch board 1 and a proprietary 40 character by 2 line display as shown in Figure 13 The LEDs are all driven by U31 which is an octal latch controlled by the KERNEL microprocessor f cp gre DISPLAY vi View Angle I PROGRAM pi MODULE fpga SUPPORT E og Kernel microprocessor fpga SPLIT microp
87. s selected SWNDNEG 10b9 display SWNDNE If DC speed control requires decreasing voltage for increasing speed then this flag should be set to non zero otherwise set to zero gives increasing voltage for increasing speed It is only applicable if DC speed control is selected SWNDSTP 10ba b display SWNDST This 16 bit number determines the change per command step 20ms when in servo controlled wind The current value in the servo wind control register 24 bits is divided by 2 SWNDSTP number of times to obtain the correction factor for the new value Thus if SWNDSTP is set to 1 then half the current value is used as the step size If SWNDSTP is setto 7 then the servo will change by 1 128th of it s present value each command step The DC output voltage can be assessed from the formula DCout 10 22 swnporF 22 39 yn swNpGN 256 25600 2560 where Vf is derived from the FM servo dividers i e SWNDGN has no effect when Vf 2 5v Vf has no effect when SWNDGN 0 Issue 1 3 23 MACHINE PARAMETERS SynchroNet ES 2 Service Manual CRAWLSPD 10bc d e display CRLSPD This parameter determines the mechanism used when a crawl is commanded For a parallel controlled machine it is a period value for the servo hardware so the larger it is the slower the machine will move It may not bear comparison to the normal servo parameters such as NOMPLY For a serially controlled machine 10bc d is the speed the ES 2 will crawl the machine and
88. st of the current serial command routines available This list will be updated as machine interfaces require new action routines If a machine cannot perform a function then the relevant table entry should be set to zero Many of the functions will be highly machine specific and therefore are likely to be beyond the scope of most users Issue 1 3 21 MACHINE PARAMETERS SynchroNet ES 2 Service Manual UNIFILM PARAMETERS MODE 10a0 This flag controls the unifilm output drive If it is non zero then the FILMA FILMB outputs will be bi phase signals if it is zero then FILMB will be a direction signal RESERVED 10a1 RAMPUP 10a2 This parameter controls the rate of change increasing frequency ofthe film output for tape speeds above play speed A larger number represents a gentler ramp A value of 00 means that the film output frequency will change abruptly to the new value Note that the film ramp parameters control the change between different operating conditions e g play to fast wind or toggle into park When a film machine is being locked to the timeline then the usual servo parameters are used to control the film output frequency RAMPDWN 10a3 display RAMPDW This parameter controls the rate of change decreasing frequency of the film output RESERVED 10a4 5 6 PRAMPUP 10a7 display PRAMUP This parameter controls the rate of change of the film output when changing from stop to play PRAMPDWN 1028 display PR
89. st sets the tach and film hardware to tach and direction signals enables the tach divider and sets the divide rate to 16 It sets the film direction to forwards and enables processor interrupts for a given time If the number of tach interrupts is not in the range expected then the following screen is displayed Tach divider output wrong re run gt Press to continue gt The ES 2 will wait until the user either presses the re run key key 3 when it re runs the divider test or the continue key key 4 in which case it continues with the next divider test 2 10 Issue 1 SynchroNet ES 2 Service Manual ES 2 TEST SOFTWARE The ES 2 will then setthe film direction to backwards and repeat the above test If this test fails then the following screen is displayed Tach divider output wrong re run gt reverse Press to continue gt Pressing the re run key key 3 now will re run the whole tach divider test pressing the continue key key 4 will enter the test select menu If the test passes then the screen will display Checking Tach divider accuracy Test 18 Okay Press to continue gt TEST 19 setup This test has 4 parts to it and allows the test engineer to set up the tach and servo phase locked loops It also prompt the test engineer to record the value of DCout when DC gain and DC offset are set to standard values On running this test the ES 2 will display the following screen Setup the servo phase locked loop Test 19 Pr
90. t 20 The first check enables the timeline interrupt via CTC3 enables the timeline mastership and counts the number of timeline interrupts received during 1 second If the ES 2 does not receive the correct number of interrupts then the following is displayed Timeline speed bad re run gt Test 20 Press to continue gt Pressing the re run key key 3 runs the first test again while pressing the continue key key 4 will continue with the test The next test enables the diflock to the highest frequency and then the lowest frequency and counts the number of timeline interrupts If the number is not within the range expected in 1 second then the following is displayed Timeline speed bad re run gt via diflock Press to continue gt Pressing the re run key key 3 will run the whole test again Pressing the continue key 4 will return to the test select menu If the test passes then the 1 12 will display the following and wait for the continue key to be pressed Checking Timeline input and diflock Test 20 Okay Press to continue gt TEST 21 mic serl This test checks the Sony serial circuitry for the 5000 series of video machines not the sony P2 port It requires the test machine connector dongle This test uses the film output to drive the sony_clk input and the command relay 0 to drive the sony_syn input The sony_out is looped back into the tach input to enable the ES 2 to read the information this line The servo relay has
91. tach divider is disabled and the tach X2 function is enabled The following screen is displayed Checking Tach input speed Test 17 The microprocessor Interrupts are then enabled for a specific time and the number of tach interrupts is counted If the number of tach interrupts is outside the range expected then the following is displayed Tach bad at ITACH re run via TachX2 Press to continue The software then waits until either the re run key key 3 is pressed in which case it re runs the tach X2 check or the continue key key 4 is pressed in which case it continues with the tach speed checking If that test passes or when the continue key is pressed the tach X2 function is disabled and interrupts are again enabled for a specific time If the the number of tach pulses counted differs from that expected then the ES 2 displays the following screen Tach bad at ITACH re run Press to continue Again the ES 2 waits for the user to press either the re run key key 3 when the second test is repeated r the continue key key 4 which returns to the test select menu If the above tests pass then the following screen is displayed Checking Tach input speed Test 17 Okay Press to Continue TEST 18 tach div This test requires the parallel machine connector dongle in order to loop the FILMA and FILMB outputs to the TACHA and TACHB inputs The routine energises the servo relay to switch the FILMA onto TACHA This te
92. tapes with badly striped timecode LOCKAC 101d This parameter determines number of subframes away from zero difference that the ES 2 is considered to be locked SVOJMP 101e This parameter adjusts the aim point of a servoing machine by one frame It allows the machine to always pull into lock in the same direction when released to external syncs It is only used for a release machine controlled by serial only no LTC 00 Always aim to issue a VAROFF command in the exact frame that matches the timeline 01 Aim to issue a VAROFF command when the machine is one frame behind the timeline if approaching the lock point from in front of the timeline leading ff Aim to issue a VAROFF command when the machine is one frame in front of the timeline if approaching the lock point from behind the timeline lagging Issue 1 3 7 MACHINE PARAMETERS SynchroNet ES 2 Service Manual MAXRATE 101f display MXRATE When the servo has attained lock and the servo stepsize has reduced to FINEMIN the internal copy of REPRATE above will be increased to the value of MAXRATE to achieve a more gentle servo action If set to zero then REPRATE is not affected 3 8 Issue 1 SynchroNet ES 2 Service Manual MACHINE PARAMETERS TACH PARAMETERS TACH 1020 This is the number of tach pulses per second at the default speed of the machine after any programmed divide rate has been applied It will be updated by the kernel software when a Calibr
93. ual ES 2 TEST SOFTWARE TEST 22 coms ram The kernel will send a message to the comms requesting the comms to check its own RAM The comms will then write the pattern aa5516 to every 16 bit location of the comms RAM between 0 and 110016 The kernel will display the following screen while the comms processor is testing Comms processor checking its own memory Test 22 If the comms processor does not read the correct pattern from it s RAM then a message is passed to the kernel processor and the following message is displayed Comms processor RAM failed re run gt Press to continue gt If the test passes then the comms sends the OK to the kernel which displays the following screen Comms processor checking its own memory Test 22 Okay Press to continue gt TEST 23 comms CTC For this test the kernel sends a message to the comms requesting it to check it s CTC and then displays the following Comms processor checking its CTC Test 23 The comms processor initialises the SIO to prevent spurious interrupts and checks if the CTC can be read by searching for a recognised pattern from the CTC If it fails to read the expected pattern then a message is sent to the kernel the test is terminated and the kernel displays Comms processor CTC re run gt faulty not fitted Press to continue gt If this test passes then all three timers inside the CTC are started and then checked to see if they are counting This is done by waiting f
94. various reference input signals and generate the timeline and generator signals Each CTC has 3 timers which can be configured in a variety of ways The following table shows how each of the individual timers in the ES 2 are used Timer number Signal Use CTC 1 timer 1 TL5 measure the phase of the timeline for servoing timer 2 VFRAME measuring the period and phase of video in reference timer 3 SFRAME measuring phase of the MACH reference CTC2 timer 1 count down timer used for record events etc timer 2 TLSYNC measuring the phase of the timeline timer 3 ITACH providing a good bad indication of tach CTC 3 timer 1 SF5 measuring the phase of the machine for servoing timer 2 TLSYNC output a timeline signal for driving the ESbus timeline timer 3 TCGREF output a generator reference signal 1 22 Issue 1 SynchroNet ES 2 Service Manual CIRCUIT DESCRIPTION Timecode interface LTC reader Figure 16 shows a block diagram of the reader U6D converts the balanced input to a single ended signal while UGA B C and U18 is responsible for converting the analogue signal to a TTL level The processor interface is provided by the Audio Kinetics custom LTC reader gate array U27 This reads the TTL level LTC separates and sorts he data and interrupts the KERNEL processor every frame edge or every 1 20th frame rate if no code is present During winding if a tach signal is present the processor will turn off the interrupts from the U27 when the ma
95. ync locked signal a mute bus or system locked line The general purpose parallel machine port is capable of issuing transport commands reading tallies reading tach generating pulse information for film machines generating a DC or FM servo control signal Two additional communication ports are an RS422 232 machine serial control port allowing control of serial video machines a diagnostics port allowing remote interrogation of the system The ES 2 also features A flexible timecode reader and generator A reference input capable of decoding video syncs or square wave pulses Issue 1 1 1 CIRCUIT DESCRIPTION SynchroNet ES 2 Service Manual Display LEDS switches User interface Commands Tach Servo Tallies Generator LTC processor amp support Timecode interface Machine interface References ESBus interface Video Pulse Serial Control comms Figure 1 ES 2 system block diagram The ES 2 circuit can be split into the following main blocks and is shown in Figure 1 Microprocessor The ES 2s Computing power required to control the machine and communicate to the outside world Machine interface Providing the means to control and synchronise a wide range of ATR DTR VTR and film machines Timecode interface Conditioning for positional reference User interface Human input and feedback via keys buttons LEDs and the LCD display ESbus interface Providing control signals and the means to i

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