Tascam Remote Control Unit RC-898 Owners Manual
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Section 8.2 - Advanced timecode functions 8-5 3) Transfer the value from the LOCATE TIME/ VA L U E display to the LCD display by holding down the SHIFT key and pressing the ENTER/ LOAD key. If you need to “fine-tune” this value, you can use the UP and DOWN keys to adjust the value of the offset while monitoring the playback of the units. 8.1.10 Auto Timecode Offset function In addition to the manual offset entry, it is also possible to set a timecode offset automatically by following the procedure below: 1) From menu group 4, move the cursor to TC Offset and press SELECT . 2) Use the RIGHT key to move the cursor to a second “invisible” field to the right of the frames field. The display will appear as follows: 3) Locate the two tapes (master and slave) so that they have the right offset. You can play up the tapes and pause them once they have been lined up, or carry out the next step while either or both of the tapes is being replayed. 4) Press either the UP or DOWN key at the correct offset time to capture and store the offset. 8.1.11 Independent clock settings It is sometimes useful to be able to reference different clock timings for the different DTRS units in the chain (if one unit is recording digital input from another digital source and another is referenced to video, for example). To allow independent settings (this function is only available if the time mode is set to timecode, and the DA-98 is acting as a slave): 1) From menu group A, move the cursor to ClkMode (clock mode), and press SELECT : 2) Use the UP and DOWN keys to select between automatic ( Auto) and individually-selectable ( Indv) clock settings. In the example above, the first three DTRS units have their clocks set automatically according to the first clock setting (i.e. units 2 and 3 cannot have their clocks set using the function described in 7.2.6, “Clock selection”), and the fourth unit can have its clock set independently of the other three. 8.2 Advanced timecode functions The following functions are designed to extend the capabilities of the DTRS system under various circumstances when working with timecode-based setups. These functions are described more fully in the DTRS manuals. Refer to the appropriate sections of these manuals for further information, if required. 8.2.1 Timecode output source The DA-98 is able to output timecode from a variety of sources. NOTE If you are using a DA-98 with ABS timing used to synthesize timecode, the DA-98 allows you to set an ABS offset, which may be used in place of this function (see 8.1.2, “Synthesizing timecode from ABS times” and also 10.2.3 of the DA-98 manual. NOTE There is an “invisible” field immediately to the right of the frames field. If you place the cursor there and increment or decremennt the value, you can change the time as a whole (as the frames field passes its maximum value, the seconds field will increment). Timecode Offset Machine 2 AUTO OFFSET NOTE The value entered in this way can be edited later using the technique described above. 98 Clock Mode Indv » Auto » » » Machine123456 NOTE In a system with multiple digital audio devices, the same clock should be used by all units which are to perform digi- tal audio transfer (e.g. dubbing, etc.). If units have different reference clocks, you cannot transfer digital audio between them. 98 98
Section 8.2 - Advanced timecode functions 8-6 1) From menu group 5, move the cursor to OutTc Src and press SELECT : 2) Use the UP and DOWN keys to select between the four options available: 8.2.2 Synchronization of timecode When timecode (including MTC) is output from a DTRS unit, it may be synchronized to either the analog or digital outputs, depending on which is in used at the time. This is necessary because of the nature of the digital-to-analog cir- cuitry employed in the DTRS units. 1) From menu group5, move the cursor to OutTc Tmg, and press SELECT : 2) Use the UP and DOWN keys to select either digital or analog synchronization for the output timecode. 8.2.3 Pull up and pull down When using DTRS units in NTSC telecine situa- tions, it may be necessary to adjust the sampling frequency fractionally, as the NTSC frame rate of 29.97 and the cinema frame rate of 24 do not form a neat mathematical ratio. The sampling frequencies of 44.1kHz and 48kHz are therefore affected when the material is trans- ferred back to film. Accordingly, the pull up and pull down functions are provided to allow the adjustment of sampling frequencies to drop-frame environments.1) From menu group 8, move the cursor to Fs Shift and press SELECT : 2) Use the UP and DOWN keys to select one of the following settings: If this setting is anything other than off on one or more DTRS unit, the PULL UP/DN indicator [10] of the RC-898 will light when the appropriate machine is selected, as will the indicator on the DTRS unit(s). 8.2.4 Error bypass When a DTRS unit is chasing timecode from an external source, the source timecode may drop out for a few frames or be otherwise discontinuous. To allow for this, a “flywheel” facility is provided, which allows the DTRS unit to continue for a set period until timecode is received again. The fly- wheel period may be set for either 10 frames or 30 frames, in the following way: 1) From menu group 4, move the cursor to ErrByPass and press SELECT : 2) Use the UP and DOWN keys to select between 10 and 30 frames for the “flywheel” period. 8.2.5 Rechase mode The DA-98 provides another facility which is used when chasing to timecode. Output TC Source Machine 1 Tape (TC Track) TAPE (TC Track)Outputs the timecode as recorded on the dedicated timecode track. TAPE (ABS)Outputs the timecode as synthesized from the ABS subcode, with all off- sets, etc. as set up in 8.1.2, “Synthe- sizing timecode from ABS times”. External (reGen)Timecode received at the timecode input is regenerated and output. External (reshape)Timecode received at the timecode input is filtered and retransmitted. Output TC Timing Digital»»»»»» Analog Machine123456 88Fs Shift Mode Machine 1 off off Pull Down 30NDF Pull Up 29.97NDF Pull Up29.97DF Pull Down 30DF NOTE If you want to use the Fs Shift function, make sure that the reference clock is set to Video or Int (see 7.2.6, “Clock selection”). If the reference clock is Word , although the setting can be made, the Fs Shift func- tion will not be enabled. Error Bypass Machine 1 10 Frame 98 98
Section 8.2 - Advanced timecode functions 8-7 When the DA-98 is chasing timecode, it can be set to lock to timecode once and run freely, or it can constantly monitor the timecode, and issue “speed-up” and “slow-down” messages to its transport to stay in sync. However, if an external or video clock is used as the clock source, the playback output will be muted while the DA-98 is adjusting the speed. If you select the rechase mode (which you may wish to do if there are gaps in the timecode), you can select a “window”. Only if the difference between the received timecode and the DA-98 position falls outside this window, the DA- 98 will rechase. However, the DA-98’s timekeep- ing is almost always good enough for you not to need to rechase. See 10.7.9 of the DA-98 manual for further details of this facility. 1) From menu group 4, move the cursor to RechsMode and press SELECT : 2) Use the UP and DOWN keys to select either rechase or free as the mode, as explained above. 3) If you have selected rechase, move the cursor to the Window field, and select either 1 or 2 seconds and the window period. This setting has no effect if free has been selected as the mode. 8.2.6 Fast LTC The DA-98 allows you to select three modes in which linear timecode (LTC) will be output when the unit is in a fast transport mode (forward or rewind). Firstly, there is a 5 frame option in which five con- secutive frames are output, the tape is then read again, and five further consecutive frames are out- put, starting at the frame which has just been read. Secondly, you can choose a “leap” option, in which timecode is continuously output, but not consecutively (the values between frames will leap as the tape is read). The last mode is “off”, in which case, no timecode will be output in fast transport modes. See section 10.4.3 of the DA-98 manual for further details of this facility.1) From menu group 5, move the cursor to Fast LTC and press SELECT : 2) Use the UP and DOWN keys to select between 05 Frame, Leap and off. 8.2.7 MIDI Timecode output Both the DA-88 and DA-98 output MIDI Time- code (MTC) from their MIDI OUT jacks, which echoes the linear timecode output from the time- code outputs. However, the DA-98 allows you to choose under what circumstances MTC will be output. You can choose not to output MTC at all, to output while fast winding as well as during placyback and recording, or to output MTC while the tape is stopped (this is possible because MTC is indi- rectly derived from an off-tape signal). For further details of this facility, see section 10.4.5 of the DA-98 manual. 1) From menu group 7, move the cursor to MTC Out , and press SELECT : 2) Use the LEFT and RIGHT cursor keys to select the field to be set, and select on or off using the UP and DOWN keys. 8.2.8 Park position The park position allows you to set a pre- roll position automatically on a DA-98 slaved to a master timecode source. This gives the master unit time to start playing timecode after starting to play, and provides optimal lock-up when locating and chasing external timecode. See sections 10.7.6 and 10.7.7 of the DA-98 manual for further details of this function. Rechase Mode Machine 1 Mode Window rechase 1 sec 98Fast LTC Mode Machine 1 05 Frame MTC Output Machine 1 Output Fast Stop on off off NOTE If the Output field is set to off , neither of the other settings will have any effect. 98 9888
Section 8.2 - Advanced timecode functions 8-8 The park position can be viewed, and set manually in the following way: 1) From menu group 4, move the cursor to Park Posi , and press SELECT . 2) If the cursor is moved to the time field, it can be edited with the UP and DOWN keys. Alternatively, the numeric keypad can be used to enter a numerical value directly, and entered with the SHIFT + ENTER/LOAD combination. Any values for hours and minutes which are entered will be discarded. The maximum value for the park position setting is 2 seconds minus 1 frame. As well as the manual setting described above, it is also possible to test the system and set this value automatically: 1) From menu group 4, move the cursor to Park Posi , and press SELECT . 2) Play and stop the master unit. 3) If chase mode is off on the slave DA-98, turn it on. 4) Use the UP or DOWN key to turn the TEST from off to on. The DA-98 will now start to rewind so that the rel- ative difference is zero. Wait until the DA-98 tape has stopped before proceeding with the next step. 5) Play the master unit. The park position value shown in the display screen will change as the park position is calcu- lated. Wait until the value has stabilized before proceeding to the next step. 6) Turn the TEST parameter from on to off using the UP or DOWN key. The value which has just been calculated will be stored as the new park position. Lockups to time- code should now take place quickly and easily. 8.2.9 Individual recording status while chasing timecode The default action for slave DTRS units is to follow the recording status of the master. How- ever, if DA-98s are being used as slave units, and they are chasing using timecode rather than ABS sync, it is possible to set them so that their record- ing status can be turned on and off individually. For further details regarding this function, see sec- tion 10.7.11 of the DA-98 manual. 1) From menu group 4, move the cursor to TcChs Rec, and press SELECT : 2) Use the cursor keys to enable (allow individual recording while chasing timecode) or disable this facility (the slave follows the master status for each machine in the chain). 8.2.10 Video resolve The timecode clock of a DA-98 may be set to resolve to a video signal received at the unit’s VIDEO IN terminal. This means that the time- code frame boundaries will be aligned with the frame boundaries as received in the video signal. This is a completely different function to the syn- chronization of the word clock to video (see 7.2.6, “Clock selection”). In addition, if video resolve is enabled, the unit can be set to track the frame boundaries constantly and rechase if it drops out of sync (re-sync), or can be set to a “lock and forget” mode (free), in a sim- ilar way to the rechase options available for time- code (see 8.2.5, “Rechase mode”). In re-sync mode, output will be muted while the unit changes speed to match frame boundaries. See section 10.6 of the DA-98 manual for further details regarding this function. Park Position Machine 1 TEST off 00s00f 30DF Park Position Machine 1 TEST off 01s13f 30DF TC Chase Indiv. Rec enable disable»»»»»» Machine123456 98 98
Section 8.2 - Advanced timecode functions 8-9 1) From menu group 5, move the cursor to Vid Rslv and press SELECT : 2) Use the UP and DOWN keys to switch the video resolve feature on or off. 3) If video resolve is on, select the synchronization mode from between free and re-sync. Video Resolve Machine 1 on/off Mode off free NOTE The video resolve capability is also available on DA-88 fit- ted with the SY-88 , but it is controlled by a DIP switch on the synchronizer board. It therefore cannot be controlled using the RC-898.
Section 9.1 - Controlling the parallel port device 9-1 9 – External control and settings This section covers the control of DTRS and other units. 9.1 Controlling the parallel port device When a unit is connected to the EXT 1 port [42] of the RC-898, the transport may be controlled usig the RC-898 transport controls. The pinouts for these transport controls are given in 3.2.2, “Parallel control/GPI pinout”. To select the “parallel” unit for control: 1) Press the MACHINE key [31]. The LOCATE TIME/VALUE display will show SELECT. 2) Press 7 on the numeric keypad. The E1 indicator on the machine number indica- tors [8] will light, showing that the parallel port unit is now selected for control. 9.2 Controlling GPI devices Up to five GPI devices may be connected to the EXT 1 port. These devices may be triggered at set times, based on the times received for display on the TA P E T I M E display of the RC-898. Refer to the documentation supplied with any units to be controlled by GPI to find out whether the unit requires the controlling circuit to be closed or open in order to trigger the event, and the time of the pulse needed to act as a trigger. The wiring for the parallel port when used with GPI devices is given in 3.2.2, “Parallel control/ GPI pinout”. 9.2.1 Setting up GPI devices The polarity of the GPI devices, and the pulse width necessary to trigger an event, may be set up individually for each GPI device. 1) From menu group 1, move the cursor to GPI Setup and press SELECT : 2) Holding down the SHIFT key, use the NEXT (UP ) and PREVIOUS (DOWN ) keys to select the required GPI unit. 3) Move the cursor to the Pol (polarity) field, and use the UP and DOWN keys to select either open or close for the polarity of the unit’s event trigger. When open is selected, the event is triggered when the circuit is open (i.e. it is a “push-to- break”-type circuit. When close is selected, the event is triggered when the circuit is closed (i.e.it is a “push-to-make”-type circuit). 4) Move the cursor to the Width field and use the UP and DOWN keys to select the pulse width of the event trigger. The minimum value for the pulse width is 0 ms, and the maximum is 990 ms, settable in 10ms increments. Most GPI units require a trigger width of 200 ms. If you are unsure of the trigger width for a particu- lar device, we suggest that you try this value first of all. 9.2.2 Setting the trigger points The location memories also serve as GPI trigger points, when GPI devices are connected to the EXT 1 port. Since up to 10 GPI events can be associated with location memories, we suggest the following method of working: • Use a “block” of location memories for this purpose, starting at a number such as 80 or 90. NOTE The RC-898 provides only transport control for a unit con- nected to the parallel port. Functions such as track arming, etc. are not possible when using the EXT 1 parallel port. NOTE Since the GPI event timings are based on the information transmitted from the DTRS recorders connected to the RC- 898, the timing may “slip” by up to one frame. GPI Setup GPI 1 Pol Width open 010 mS NOTE Note that the polarity setting here is also used as the polarity setting for transport control signals sent to the E1 parallel port device ( see 9.1, “Controlling the parallel port device” . In this case, the pulse width is fixed at 500 ms.)
Section 9.3 - Controlling the serial port (9-pin) 9-2 • Enter the starting memory number of your “block” minus one in the MEMORY NO. display. • While playing back the program material which will be used with the GPI events, use the CUE STR key [39] to add repeated cue points to the list, as described in 6.5.8, “Repeated entry of location points”. • Alternatively, key in these cue points manually from a cue list. • Adjust the fine timing of these trigger points using the jog dial, if necessary. Of course, there is nothing to prevent you from using existing location memories for GPI triggers, but you may find it easier to work with a series of events dedicated to this purpose. 1) From menu group 1, move the cursor to Event and press SELECT : 2) Select which event you will be editing (from 1 through 10) using the NEXT (SHIFT +UP ) and PREVIOUS (SHIFT + DOWN ) keys to change the value of the Event field. 3) Move the cursor to the GPI field, and use the UP and DOWN keys to select the GPI device associated with this event (from 1 through 5). 4) Move the cursor to the Memo (location memory) field, and use the UP and DOWN keys to select the location memory for the GPI event. Alternatively, you can enter the number of the memory location using the numeric keypad, and hold down SHIFT and then press ENTER/LOAD to transfer the memory number to the display screen. The time value of this location memory will be shown on the display screen. However, you cannot adjust this value from here. You must edit the loca- tion memory (see 6.5.5, “Editing a location”) to do this—the time value will automatically be updated.You can also use the UP and DOWN keys to choose the location memory. 9.3 Controlling the serial port (9-pin) The EXT 2 9-pin serial connector [43] of the RC- 898 is used for RS-422 control of suitably- equipped devices (Sony P2 protocol). As an exam- ple of how this may be used, if you connect the master VTR to the EXT 2 port, you can use the RC-898 to control the whole system. The menus in menu group 7 whose titles start with “9-pin” refer to devices which are controlled through this connector. 9.3.1 Selecting the serial port device When you want to control the device attached to the RS-422 port using the transport keys of the RC-898, follow the procedure below: 1) Press the MACHINE key [31]. The LOCATE TIME.VALUE display will show SELECT. 2) Press 8 on the numeric keypad. The E2 indicator on the machine number indica- tors [8] will light, showing that the parallel port unit is now selected for control. 9.3.2 Location pre-roll on the serial unit The unit controlled by the serial port may have a pre-roll time which is set independently of the pre-roll time used by DTRS units. This allows the unit to be parked optimally for lockup when locat- ing to cue points: Event Event 1 GPI Memo 30DF 1 92 01:02:13:21 NOTE Location memory 00 is a special case. If this location mem- ory is selected, the event will be turned off. NOTE The exact level of control possible by using the RC-898 depends on the implementation of the P2 protocol by the device. Refer to the unit’s documentation for details of what control is possible through the serial connection. When a device is selected for control in this way, the REC FUNCTION keys can be used to arm the two analog and four digital tracks, as defined by the P2 protocol, depending on the settings made in 9.3.4, “Split mode on the serial unit” and 9.3.5, “Controlling recording operations on the serial unit”. The mapping of these tracks to the actual tracks of the unit is determined by the implementation of the protocol by the unit.
Section 9.3 - Controlling the serial port (9-pin) 9-3 1) From menu group 7, move the cursor to 9pinLocPr and press SELECT : 2) Use the numeric keypad to enter a time in minutes and seconds between 00:00 and 59:59. 3) Press and hold down the SHIFT key and press the ENTER/LOAD key to transfer the value to the display screen. Alternatively, you can use the UP and DOWN keys to alter the values of the minutes and seconds fields. 9.3.3 Serial unit timing source The RS-422 device can be set to accept its timing signals from either external timecode, or from the Timer 1 internal time source (the video CTL sub- code track). 1) From menu group 7, move the cursor to 9pinTimMod (9-pin time mode) and press SELECT : 2) Use the UP and DOWN keys to select either Timecode or the Timer 1 timing source (subcode timing). If the timecode option is selected and the VTR does not include a timecode reader, or the tape has not been striped with timecode, the RC-898 tape counter will show all hyphens: --:--:--.--. 9.3.4 Split mode on the serial unit There are two ways of operating the E2 unit with the RC-898 transport controls. Firstly, all transport controls, including the record (REC key and the REC FUNCTION keys 41 through 46 ) can be used to control the VTR acting as the E2 unit con- nected to the RS-422 port. This is referred to as “normal” mode. In normal mode, the following RC-898 keys per- form these P2 functions: However, in a video post-production situation, it is quite likely that you will need to control the trans- port of a VTR, which acts as a timecode master for the DTRS slaves. These DTRS slaves will be used for recording, but the VTR will not (other- wise the worktape will be erased!). The RC-898 therefore provides you with a “split mode” in which all transport keys except the RECORD key and the REC FUNCTION keys control the VTR, and the recording keys control the DTRS units. In this way, all recording operations, including auto-punch operations, can be carried out on the DTRS units without the risk of accidentally eras- ing the VTR tape. However, there is one function where operation is slightly different, and this is “on-the-fly” punch- ing. Usually, when DTRS tracks have been armed, and the tape is being played, pressing RECORD will drop the tracks into record mode, and press- ing PLAY will drop them out into play mode. In split mode, this is not possible, since the PLAY key controls the VTR. To punch in and out of armed tracks on the fly in split mode only, press RECORD to drop in, and RECORD to drop out again. To change between normal and split mode: 1) From menu gropup 7, move the cursor to 9pinCtlMd (9-pin control mode) and press SELECT : 2) Use the UP and DOWN keys to select between Split and Normal. 9.3.5 Controlling recording operations on the serial unit If split mode has been selected (see 9.3.4, “Split mode on the serial unit” above), the following 9pin Locate Preroll 00min00sec 9pin Time Mode TimecodeALL SAFEStandby ALL INPUTFULL EE AU TO MO NSEL EE PRRLPreroll RHSLPreview AUTO PUNCHAU T O E D I T 9pin Control Mode Split
Section 9.4 - Other DTRS control functions 9-4 function allows toggling the serial unit recording capability. 1) From menu group 7, move the cursor to 9pinRecAc (9-pin recording acceptable) and press SELECT : 2) Use the UP and DOWN keys to choose between on and off. When this parameter is set to on, the REC FUNCTION keys which usually control tracks 41 through 48 (DTRS 6) will now control the E2 device logical analog and digital tracks (no matter what the tracks actually are) as marked. The following chart explains the relationship between the serial unit, the split/normal mode, and this function: 9.4 Other DTRS control functions The following functions described DTRS fea- tures which relate to control, but are not timecode- related. The RC-898 can only perform these func- tions on DA-98 units. Some of these functions are available on DA-88 units, but they cannot be con- trolled from the RC-898. 9.4.1 Choosing a control protocol The DA-98 can be controlled from a variety of external sources as well as the RC-898. These sources are: P2 protocol (9 pin), MIDI Machine Control, and a bus protocol carried over the RS- 422 cable and produced by, for example, the TAS- CAM ES-61 editing controller. See section 11.0.1 of the DA-98 manual for further details relating to this function.1) From menu group 3, move the cursor to Ctrl Prt (control protocol) and press SELECT : 2) Use the UP and DOWN keys to select between 9Pin, MIDI, Bus and off. Even when a control protocol is selected, the RC- 898 and DTRS sync protocol can still be used to address and control the DA-98. 9.4.2 Track mapping functions When the track arming and recording of a DA-98 unit is controlled by an external controller, you can specify which tracks on the DA-98 corre- spond to the tracks controlled by the controller (for arming and recording purposes). The standard video controller protocol (P2 protocol) allows for control of up to eight digital and four analog audio tracks. This function allows you to map DA-98 tracks to the “logical” tracks. This mapping of DA-98 tracks to controller tracks does not imply any correspondence between the user interface of the controller and the DA-98 tracks. It refers, rather, to the relationship between the command signals transmitted by the controller and the DA-98 tracks. 1) From menu group 6, move the cursor to Trk Map and press SELECT : 2) Use the UP and DOWN keys to select the track mapping, according to pre-set options as shown in the table below. Note that while there are no user-settable track mappings, the pre-set mappings are designed to cover every set of circumstances. 9pin Rec Acceptable off Control modeRec AcceptableTracks 41–46 refer to:RECORD key controls: Normal off Serial unit Serial unit Normal on Serial unit Serial unit Split off DTRS (uit 6) DTRS Split on Serial unit Serial unit 98 98Control Protocol Machine 1 9Pin Track Mapping Mcn 1 Ana 1234 Dig 1234 Trk 12345678 98