Tascam RC-898 Timecode functions, Primary timecode functions, Selecting the timecode source

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Section 8.1 - Primary timecode functions

8 – Timecode functions

9888 This section describes the timecode-based functions available through the RC-898. Note that while the RC-898 contains no timecode generator or reader of its own, it is able to control the time- code generators and synchronization facilities of DA-98 and DA-88/SY-88 units. Since the DA-38 does not have any timecode facilities, this section does not have any relevance if you are using a setup composed of only DA-38 units.

Note that in this section, we use the term “time- code” to refer to SMPTE/EBU timecode rather than to ABS timecode.

When using a chain of DTRS units which are to be synchronized to external timecode, you will usually need to synchronize the first unit in the chain. The other units should then chase to the first, using the DTRSABS synchronization facil- ity. For information related to this and to other non-timecode-related synchronization features, see 9, “External control and settings”.

8.1 Primary timecode functions

These functions cover the basic timecode setup when synchronizing DTRS units to timecode.

8.1.1 Selecting the timecode source

98When using a DA-98 unit, the timecode used for recording can be from one of three different sources: external, from the internal generator, or off-tape (“synthesized” timecode—see 8.1.2, “Synthesizing timecode from ABS times”). See section 10.5 of the DA-98 manual for further details regarding this function.

1)From menu group 8, move the cursor to TcRec Src and press SELECT:

T C R e c o r d

S o u r c e

M a c h i n e

1

E x t e r n a l

T C

 

 

 

 

2) Use the UP and DOWN keys to select between

External TC, Generator TC and Tape.

If you select Tape, there will be another param- eter shown which will correspond to the timecode type selected in 6.4, “ABS setting”. This shows the kind of timecode on the tape: striped timecode or

synthesized timecode (as described in 8.1.2, “Syn- thesizing timecode from ABS times” below).

8.1.2 Synthesizing timecode from ABS times

9888 As mentioned earlier, linear timecode does not necessarily have to be striped on a tape for the DTRS unit to be able to use the TC setting. The subcode can be used to synthesize timecode, eliminating the need to pre-stripe the tape for timecode-based work.

98In addition, the DA-98 can add offsets to the ABS value, so that the timecode values can start at any desired position, or can create a repeating timecode pattern for tracks of nominal 10 or 20 minutes’ duration. See also 10.2.3 and 10.2.4 of the DA-98 manual for further details.

1)From menu group 5, move the cursor to Tape TC, and press SELECT:

T a p e T C M o d e

 

M a c h i n e

1

M o d e

A B S

2)Use the SHIFTed UP and DOWN keys (NEXT and PREVIOUS) to select the DTRS unit whose values you will change.

3)Use the UP and DOWN keys to choose between the following:

• TC Track: The timecode is read from the timecode track striped on the tape. Full details of these operations are given in 8.1.7, “Record- ing the timecode on a DTRS timecode track”..

•ABS: The timecode is “synthesized” from the ABS time (i.e. the ABS values are read and used as timecode).

•98 ABS-Ofs: You can add or subtract an offset from the ABS values to arrive at the final synthesized timecode value. If you select ABS-Ofs, use the numeric keypad [16] to enter an offset value on the LOCATE TIME/ VALUE display [15] and enter it into the offset value on the display screen using the SHIFT and ENTER/LOAD keys [23]+[20].

•98 ABS-13and ABS-23: provide a con- venient way of dividing a tape into “sessions”. Timecode is synthesized with a pre-roll time of xx:57:00:00, the session is assumed to start at xx:00:00:00, and finishes at xx:10:00:00 or xx:20:00:00, depend-

8-1

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Contents RC-898 For U.S.A Menu and basic operations Table of Contents IntroductionRC-898 features ConnectionsMenu and parameter reference Table of Contents Making settings on the Dtrs unitsExternal control and settings Timecode functionsUnpacking Key featuresKey features IntroductionDigital audio cables Precautions and recommendationsPrecautions and recommendations Battery backupReference clock in a digital studio AccessoriesAccessories Accessories RC-898 features Front panel Time Mode indicators Machine number indicators Through 6, E1, E2Lock Status indicators Vari indicatorsFront panel ENTER/LOAD key Preset keyData INC/DEC key and indicator Repeat key and indicatorRear Panel Contrast Rear Panel DIP switches 1Machine IDs ConnectionsConnection to Dtrs units Connection to Dtrs unitsConnections GPI event units Connections parallel unitsConnections RS-422 Units Connections parallel unitsMemory and batteries Memory and batteriesMemory and batteries Invalid operations Menu and basic operationsNavigation NavigationData entry Resetting values to zeroFast setting of values Setting values using the Value displayCommonly-used menus Selecting the unit controlled by the menusSaving the current setup Storing and recalling user setupsStoring and recalling user setups Recalling menus using the function keysRecalling a user setup or restoring factory settings Storing and recalling user setups Formatting tapes Basic Dtrs operationsTransport controls Selecting the unit to which operations referArming tracks Shuttle modeMonitoring MonitoringShuttle muting Shuttle monitoringMonitoring Monitoring flowchart DA-88 and DA-38 Monitoring Monitoring tablesMonitoring Reference modes Setting the precisionSetting a relative time reference Location functionsReturn-to-zero ABS settingABS setting Selecting Time ModeAuto play Setting the location pre-roll valueLocation operations Location operationsRecalling a location memory Manual entry of a location pointEditing a location Storing the location in a memoryEditing a location memory Repeating a sectionRepeating a section Repeated entry of location pointsPunch operations Crossfade times Performing the punch recording Setting pre-roll and post-roll timesRehearsing the punch recording Punch operations Track operations Making settings on the Dtrs unitsTrack delay Track operationsRec Mute function Key ModeUnit-related functions Unit-related functionsAuto Offset function Chasing with an offsetFrom menu group E, move the cursor to either Checking the offsetClock selection Output timingDither Varispeed pitch controlInput selection Word lengthSine oscillator Unit-related functions Confidence modeReference levels Meter modesN e O s c i l l a t o r C h i n e Unit-related functions Selecting the timecode source Timecode functionsPrimary timecode functions Primary timecode functionsSelecting a timecode type Setting the generator start timeStart the timecode source Checking the generator progressRecording the timecode on a Dtrs timecode track Rewind the tape to the beginningChasing with a timecode offset Chasing to external timecodeAuto Timecode Offset function Independent clock settingsAdvanced timecode functions Advanced timecode functionsPull up and pull down Error bypassRechase mode Synchronization of timecodePark position Fast LTCMidi Timecode output Play the master unit Individual recording status while chasing timecodeVideo resolve D e o R e s o l v e C h i n e O f f E e Advanced timecode functions Controlling GPI devices External control and settingsControlling the parallel port device Location pre-roll on the serial unit Controlling the serial port 9-pinControlling the serial port 9-pin Selecting the serial port deviceUse the UP and Down keys to select between Split and Normal Split mode on the serial unitSerial unit timing source Controlling recording operations on the serial unitTrack mapping functions Other Dtrs control functionsOther Dtrs control functions Choosing a control protocolDevice emulation Recording delayTimecode track mapping Remote track armingMMC ID Fast wind speedCue-up tally D I / B u s I D C h i n e C e i v e Other Dtrs control functions Menu group Menu and parameter reference Menu groupsMenu groups GPI Time value to Timecode type Output All parameters On, off 7, Midi Time Fast wind mode Menu group E Menu group aMenu group F Alphabetical list of menu items Alphabetical list of menu itemsSpecifications SpecificationsDimensions Dimensions Dtrs Index A-EABS 6-2,8-2 Index F-OIndex P-T Generator 8-1,8-2,10-5,10-6 Index U-ZRC-898
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