API_MagLink_synchronizer_lit电路图.pdf

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1、SYNCHRONIZER An indispensable tool in multi-track audio production; video mixing, editing and sweetening; fi lm sound track production, and foreign language overdubbing. MagLink is a completely new approach to fast, effi cient tape synchronizing, position logging and editing. Through the use of a un

2、ique timing code system, videotape, multi-track audio, and mag netic fi lm machines may now be locked in synchronism, offset, or stopped and started at preset positions with an accuracy not formerly attainable. A master and any number and any type of slave machines may be controlled by MagLink and w

3、ill remain synchro nized even in REWIND and FAST FORWARD modes. -T AUTOMATED PROCESSES, INC. - 80 MARCUS DRIVE, MELVILLE, NEW YORK 11746 516-694-9212 RadioFans.CN 收音机爱 好者资料库 SYlMCHRONi MagLink acts as a precise electronic sprocket coupled to an accurate programmable footage counter which links and c

4、ontrols any number and any type of tape machines. This is accomplished by means of the MagLink position code which can be recorded on one track of each tape during the original session or applied later during the mix ing or editing process. A MagLink code converter is avail able to accommodate SMPTE

5、 coded tapes. A separate code generator can be used for recording at remote loca tions. The various modes of operation and their functions are discussed below. SYNCHRONIZATION Synchronization can occur between a master tape machine and up to six slave machines per Model 200 assembly. When the AUTO/M

6、ANUAL switch is set to AUTO, all slaves will automatically assume the same stationary posi tion as the master, regardless of where they were, and will remain stationary until the master tape machine is set in motion. When this happens, all slaves stay locked to the master, whether it is in the PLAY

7、or RECORD mode, or in the FAST FORWARD or REWIND mode. In the latter two modes, synchronization will be main tained regardless of the speed of the machines, and in the case of most machines available today, regardless of whether or not the tape is lifted away from the heads. Bear in mind that no mod

8、ifi cations to the tape machines are re quired. However, connections to the remote motion con trols are necessary. This is a simple process and data is provided. These connections are required for the master and the slaves. Additionally, connections are made to the drive motor of each slave. OFFSET

9、The term OFFSET denotes the constant difference in posi tion maintained between two machines in motion. For example, one slave may always be .5 second behind the master. Offset can be created in either of two ways: A. The CONTROL ASSIGNMENT switch is used to select the appropriate machine. Then, usi

10、ng the keyboard, any desired offset (up to 31 hours) may be entered and the OFFSET key depressed. As soon as the OFFSET key has been depressed, the slave will assume the offset. The actual offset is indicated by the lower half of the POSI TION READOUT in units determined by the READOUT CONVERSION SE

11、LECTOR. If a negative offset is required, i.e., if a machine is to fall behind the others, the number entered on the key board is preceded by the minus sign (). B. Pushing the ADVANCE or RETARD button will cause the selected machine to increase or decrease its speed at the rate of 2 frames (.07 seco

12、nd) per second with respect to the others, thus causing an offset. When the button is released, this offset will be retained, even if the machines are stopped, started, and run in fast for ward or rewind. Regardless of which way offset is achieved, zero off set can be restored automatically by simpl

13、y pressing the OFFSET key. Offset mode operation is verifi ed by the OFFSET INDICATOR. SEARCH The search functions can be used to fi nd any position on any or all of the machines in the group. When the CONTROL ASSIGNMENT switch has selected a slave, entering a 1 to 8 digit position on the keyboard f

14、ollowed by depressing the SEARCH button will cause the selected machine to fi nd and assume that position. When the CONTROL ASSIGNMENT switch is in the MASTER POSITION, the master as well as all slaves will fi nd and assume the selected position. If the AUTOSEARCH button is pressed at the start of a

15、 take, the tape will return to that starting point each time the SEARCH key is pressed. PRE-PROGRAMMING Using the pre-programming function will allow the master machine to be synchronized to slaves containing portions of material located at random throughout the length of their tapes. For example, a

16、ssume the master is a VTR, and one of the audio slaves contains a number of sound effects which have to be synchronized with various portions of the master tape. The requirement may be that, at 10 min., 15 sec, 12 frames on the master a sound effect located at 1 min., 5 sec, 10 frames on the slave s

17、hould be in sync with the master until 10 min., 20 sec, 20 frames of the latter (cue 1). Also, from 15 min., 10 sec, 10 frames, to 18 min., 0 sec, 0 frames, the master is to be synced to material located on the slave at 20 min., 10 sec, 10 frames (cue 2); and from 20 min., 20 sec, 0 frames, to 20 mi

18、n., 40 sec, 18 frames on the master, material located at 8 min., 8 sec, 8 frames on the slave (cue 3). The synchronizer will be programmed as follows (before or while the machines are in motion): Set the CONTROL ASSIGNMENT switch to MASTER, the START/FINISH switch to START, and enter 10 15 12, and d

19、epress the ENTER key; then set the CONTROL ASSIGNMENT to the fi rst slave and enter 1 5 10, and depress the ENTER key, return the CONTROL ASSIGN MENT switch to MASTER, set the START/FINISH switch to FINISH, and enter 10 20 20, depress the ENTER key. Finally, enter the cue number (1) and depress the

20、ENTER key. The same procedure is repeated to enter the remaining data, and can be written in a shorter form thus: MASTER START/10 15 12/ENTER SLAVE START/1 5 10/ENTER MASTER FINISH/10 20 20/ENTER, 1/ENTER MASTER START/15 10 10/ENTER SLAVE START/20 10 10/ENTER MASTER FINISH/18 0 0/ENTER, 2/ENTER etc.

21、 When the master tape machine is set in motion, the slave will go to position 15 10 and wait. Then, when the master reaches 10 15 12, the slave will go into synchro nization until 10 20 20, at which time it will unlock, and go to position 20 10 10 to wait for the master to reach 15 10 10, whereupon

22、it will be in synch as shown above. The slave will always assume a waiting position which is located suffi ciently ahead of the entered position, to be completely in sync with the master when it reaches that position. To change any individual cue, enter the new data along with the cue number of the

23、cue to be changed. The old data RadioFans.CN 收音机爱 好者资料库 will then be erased from the memory and the new data in serted in the correct sequence. In order to erase the entire memory prior to pre-programming a new show, set the CONTROL ASSIGNMENT SELECTOR to CANCEL and press the ENTER key. An accessory

24、 memory unit makes it possible to permanently store and retrieve pre-program med data. TIMING CODE CLOCK The code clock can be set to zero, or to any point in time through the use of the keyboard and the RESET key. There is an internal switch in the rack equipment for use with color sync (NTSC). A J

25、am Sync feature allows the clock to synchronize with a pre-existing time code and continue consecutive time. This is useful when doing insert recording (drop ins) or add-ons. It eliminates the necessity of re-recording the entire time code in order to achieve a consecutive count. To synchronize the

26、clock with a pre-recorded time code on the tape simply press the RESET key, then put the code track in Record to cause the time code to be re corded beyond that point. In synchronization, a consecu tive count is not required, but may be a convenience for editing point computations. On the other hand

27、, a time of day clock may be preferred when take identifi cation is of prime importance. SELECTABLE CONVERSION DISPLAY The MagLink control panel will display the machine posi tions in units that are commonly used in different applica tions, as indicated by the 5-position READOUT CONVER SION SELECTOR

28、. Additional readout displays may be re- moted if required. In the fi rst three positions of the CONVERSION SEL ECTOR, the fi rst six digits display hours (0-23), minutes (0-59) and seconds (0-59). The last two digits display frames (0-29), frames (0-24), or tenths of seconds. In the last two positi

29、ons the fi rst digits display feet (0-9999), and the last two, 16mm frames or 35mm frames (0-39 and 0-15 respectively). Since all position codes are derived from the same basic code format, the CONVERSION SELECTOR can be moved to any position at any time during recording or playback. The DISPLAY HOL

30、D and FRAME READ switches are for ease in reading the display while the tape machines are in motion. Pressing the DISPLAY HOLD button freezes the display instantly, permitting the accurate readout of a cue location. The FRAME READ switch unblanks the last two digits on the right of the display. The

31、count or identity of these rapidly changing digits is constantly known by the system even though the display normally will not show them. With this switch they can be recalled at will, typically when the display is frozen or when the machines are at rest. In the AUTO mode, the slave portion of the r

32、eadout (con cerning the particular slave selected by the CONTROL AS SIGNMENT SELECTOR) reads the offset of that slave from the master. It will show 00 if there is no offset, and master and slave are in sync. When achieving a particular offset, or returning to dead sync, the readout will show progres

33、s toward or away from the 00 point. Whenever a keyboard entry is made, that entry will be displayed on the readout, temporarily displacing the pre-existing display until the action is called for; and then the progress toward that action will occupy the display. SYNCHRONIZER FRONT PANE In the PRE-PRO

34、GRAM mode, the true positions of mas ter and selected slave are displayed. True positions are also displayed in the MANUAL mode in which the machines operate as conventional independent tape drives. In addition to the synchronizer controls, the only other controls required to operate the tape machin

35、es are those normally needed to run the master machine, and an optional RECORD button for each slave. These RECORD buttons, are provided since it is possible to RECORD as well as PLAY BACK from a tape in sync. Through the correct interface module, the MagLink output can be made compatible with any t

36、ype of machine. The unit will control synchronous motors as well as servo or other voltage controlled motors. Contact closures are provided for audio mute, etc. during search or slewing. RadioFans.CN 收音机爱 好者资料库 E M I POSITION READOUT Upper half displays the position of the master tape; lower half di

37、splays the position, or offset, of any slave as determined by the CONTROL ASSIGNMENT SELECTOR (4). 2 FRAME READ CONTROL This press to activatetwist to lock switch permits reading the FRAMES or .1 SEC portion of the POSITION READOUT which is normally blanked for ease of operation. 3 DISPLAY HOLD CONT

38、ROL Press to freeze the display while tape is in motion; twist button to hold display while logging. 4 CONTROL ASSIGNMENT SELECTOR Determines which machine will be affected by the operation of controls (6) thru (14). It will also determine which slave is monitored on the PO SITION READOUT. The CANCE

39、L position per mits the entire pre-program memory to be erased when the ENTER key (8) is pressed. 5 AUTOSEARCH BUTTON Used for repeated automatic return to start of take, etc. Used in conjunction with SEARCH key (8). Present position may be entered by pressing the AUTOSEARCH button. Later, pressing

40、the SEARCH key will cause the ma chine to return to that point. 6 START/FINISH SWITCH Used in conjunction with the ENTER key (8) and the CONTROL ASSIGNMENT SELECTOR (4) to pre-program a sequence of operations. In the START position, the switch permits entry of the position of the MASTER at which a s

41、lave is to start in sync. An entry made with the switch in the FINISH position determines the point at which the slave will unlock out of sync and either stop or search for the next start point. 7 ADVANCE AND RETARD BUTTONS Depressing the ADVANCE or RETARD button will speed up or slow down the selec

42、ted ma chine, thus creating an offset which will be dis played on the POSITION READOUT, and which will be maintained when the button is released. 8 ENTER KEY Used in conjunction with START/STOP switch (6). 9 SEARCH KEY Entering a position on the keyboard, followed by depressing the SEARCH key, will

43、command a selected tape machine to search for and then wait at this position. See AUTOSEARCH (5). 10 RESET KEY Used to reset the code generator when starting a time code recording. Set the desired starting point with the keyboard and enter by depressing the RESET key. 11 OFFSET KEY Entering a number

44、, followed by depressing the OFFSET key, will immediately create an offset between one selected machine and all other ma chines in the system. 12 (MINUS) KEY Provides the selected machine with a negative offset or retard. 13 CLEAR KEY Used to clear incorrect data entry. 14 KEYBOARD Used to enter off

45、sets and tape positions in con junction with switches (8) thru (13). Any num ber entered on the keyboard will be shown on the POSITION READOUT, and will temporarily replace the machine position otherwise dis played. 15 READOUT CONVERSION SELECTOR Converts the position display to the format selected

46、by the switch. 16 PROGRAM INDICATOR Lights when in the PRE-PROGRAM mode. 17 OFFSET INDICATOR Lights when the selected slave is commanded to be displaced with respect to the MASTER. 18 SYNC INDICATOR Lights when machines are locked in synchron ism, with or without offset. 19 RECORD BUTTONS Control th

47、e RECORD functions of each of the slave machines. 20 AUTO/MANUAL SWITCH In the AUTO mode, MagLink controls machines connected to it. In the MANUAL mode, the posi tions of the machines are monitored, but they are not controlled by MagLink. BASIC SYSTEM AND ACCESSORIES Model 200 Basic MagLink System f

48、or 1 Master, 1 Slave. Includes Code Generator and 1 No. 241 Memory Card. Part No. 205 Interface Equipment for each additional slave Consists of: Relay Interface Card* Capstan Control Card* Logic Card Set of two Filter Cards Specify manufacturer and model number of master and each slave to be connect

49、ed to MagLink to assure correct interface. Model 250 Motor Drive Amplifi er for Slave (required for synchronous motors) Model 210 Separate Self-powered Code Generator Model 211 Code Generator with Precision Crystal Clock Model 220 SMPTE to MagLink Code Converter Model 230 Additional Readout Display in Cabinet Part No. 241 Additional Memory Card for One Hundred Cues Part No. 244 Additional Memory Card for Four Hundred Cues Model 260 Memory Unit for Permanent Pre-Program Storage SYNCHRONIZER TYPICAL APPLICATIONS 1 SYNCHRONIZING AUDIO TAPE RECORDERS SYNCHRONIZING VIDEO TAPE RECORDERS AUDIO IN