Tascam RC-898 owner manual Chasing to external timecode, Chasing with a timecode offset

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Section 8.1 - Primary timecode functions

6)To check the off-tape timecode as it is being recorded, from menu group E, move the cursor to Tape TC (there is no need to press

SELECT)):

E x t T C

A b s D i f f

> T a p e T C

R e l D i f f

G e n T C

 

 

0 1 : 0 1 : 2 2 : 0 3

3 0 D F

 

 

 

The bottom line of the display shows the current timecode value being output from the tape. If the tape is stopped, the last timecode read from tape will be shown.

External timecode, if it is being used for recording or for synchronization purposes, can be read in the same way, except that the cursor should be moved to Ext TC in menu group E.

8.1.8Chasing to external timecode

When chasing to an external timecode source (remember that you cannot chase to MTC), there are two cases to be considered. The first is when the DTRS unit which will be chasing timecode is the first unit in the chain. In this case, there is no DTRS sync signal received at the SYNC IN con- nector (of course, the RC-898 provides control signals), and hence, pressing the CHASE key [32] will automatically synchronize the DTRS unit to the incoming timecode.

The reference to which the incoming timecode is matched, however, depends on the Time Mode settings of the DTRS unit with regard to ABS or timecode (see 6.4.2, “Selecting Time Mode”).

In the case of a unit which is connected to the master DTRS unit in the chain, the situation is a little more complex, as the unit must be set up to slave to incoming timecode rather than the DTRS sync signals. Here, the Time Mode menu is used once again (6.4.2, “Selecting Time Mode”), but here it determines the chase sync source; time- code or ABS sync.

Note that it is unlikely that you will need to syn- chronize a slave unit with timecode—typically, only the first unit in the chain will be a timecode slave, and this will act as a DTRS sync master for the other units in the chain.

8.1.9 Chasing with a timecode offset.

NOTE

This procedure described here should be used when chasing to timecode. When slave machines are chasing to DTRS sync from a master DTRS unit, use the procedure described in 7.2.3, “Chasing with an offset”.

If the timecode on the DTRS unit matches the timecode coming from the master unit (e.g. the DTRS tapes contain a video soundtrack and have been striped either concurrently with, or from the video tape), there is no need for an offset.

If, however, the DTRS tracks are not linked in this way with the master source, an offset is required. The offset can be ±12 hours from the received timecode. Timecode “wraps” in a 24-hour clock format, so that 12 hours in advance of 13:00:00:00 is 01:00:00:00, and 12 hours behind 02:00:00:00 is 14:00:00:00.

1)From menu group 4, move the cursor to TC Offset and press SELECT:

T i m e c o d e O f f s e t

 

M a c h i n e 1

 

+ 0 0 : 0 0 : 0 0 : 0 0 . 0 0

3 0 D F

 

 

Note that this setting is made to subframe accu- racy. The timecode type will be shown in the bot- tom right of the display screen.

2)Use the numeric keypad to set the offset (use the +/- key to change values between positive and negative).

The value will be shown in the LOCATE TIME/ VALUE display and the OFFSET indicator [10] will light.

If an offset value is set on any unit or units and the Time Mode is set to TC, the OFFSET indicator [10] will light.

As an alternative to using the numeric keypad, you may also use the cursor keys to enter values directly into the LCD display.

8-4

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Contents RC-898 For U.S.A Connections Table of Contents IntroductionRC-898 features Menu and basic operationsTimecode functions Table of Contents Making settings on the Dtrs unitsExternal control and settings Menu and parameter referenceIntroduction Key featuresKey features UnpackingBattery backup Precautions and recommendationsPrecautions and recommendations Digital audio cablesReference clock in a digital studio AccessoriesAccessories Accessories RC-898 features Front panel Vari indicators Machine number indicators Through 6, E1, E2Lock Status indicators Time Mode indicatorsRepeat key and indicator Preset keyData INC/DEC key and indicator Front panel ENTER/LOAD keyRear Panel Rear Panel DIP switches 1 ContrastConnection to Dtrs units ConnectionsConnection to Dtrs units Machine IDsConnections parallel units Connections parallel unitsConnections RS-422 Units Connections GPI event unitsMemory and batteries Memory and batteriesMemory and batteries Navigation Menu and basic operationsNavigation Invalid operationsSetting values using the Value display Resetting values to zeroFast setting of values Data entrySelecting the unit controlled by the menus Commonly-used menusRecalling menus using the function keys Storing and recalling user setupsStoring and recalling user setups Saving the current setupRecalling a user setup or restoring factory settings Storing and recalling user setups Selecting the unit to which operations refer Basic Dtrs operationsTransport controls Formatting tapesMonitoring Shuttle modeMonitoring Arming tracksShuttle monitoring Shuttle mutingMonitoring Monitoring flowchart Monitoring Monitoring tables DA-88 and DA-38Monitoring Location functions Setting the precisionSetting a relative time reference Reference modesSelecting Time Mode ABS settingABS setting Return-to-zeroLocation operations Setting the location pre-roll valueLocation operations Auto playStoring the location in a memory Manual entry of a location pointEditing a location Recalling a location memoryRepeated entry of location points Repeating a sectionRepeating a section Editing a location memoryPunch 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 operationsUnit-related functions Key ModeUnit-related functions Rec Mute functionChasing with an offset Auto Offset functionOutput timing Checking the offsetClock selection From menu group E, move the cursor to eitherWord length Varispeed pitch controlInput selection DitherMeter modes Unit-related functions Confidence modeReference levels Sine oscillatorN e O s c i l l a t o r C h i n e Unit-related functions Primary timecode functions Timecode functionsPrimary timecode functions Selecting the timecode sourceSetting the generator start time Selecting a timecode typeRewind the tape to the beginning Checking the generator progressRecording the timecode on a Dtrs timecode track Start the timecode sourceChasing to external timecode Chasing with a timecode offsetAdvanced timecode functions Independent clock settingsAdvanced timecode functions Auto Timecode Offset functionSynchronization of timecode Error bypassRechase mode Pull up and pull downPark 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 Selecting the serial port device Controlling the serial port 9-pinControlling the serial port 9-pin Location pre-roll on the serial unitControlling recording operations on the serial unit Split mode on the serial unitSerial unit timing source Use the UP and Down keys to select between Split and NormalChoosing a control protocol Other Dtrs control functionsOther Dtrs control functions Track mapping functionsRemote track arming Recording delayTimecode track mapping Device emulationMMC 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 a Menu group EMenu group F Alphabetical list of menu items Alphabetical list of menu itemsSpecifications SpecificationsDimensions Dimensions Index A-E DtrsIndex F-O ABS 6-2,8-2Index P-T Index U-Z Generator 8-1,8-2,10-5,10-6RC-898
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