Tascam RC-898 owner manual Location functions, Reference modes, Setting the precision

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Section 6.1 - Reference modes

6 – Location functions

The RC-898 can store and recall up to 100 loca- tion memory positions, allowing you to find key points in a recording project easily.

The contents of location memories (timecode val- ues) are displayed on the LOCATE TIME/VALUE LED display [15], and the number of the current location memory is displayed on the MEMORY NO. 2-digit LED display [14].

6.1 Reference modes

Before proceeding with an explanation of the way in which location operations are carried out, it is necessary to examine the way in which times are displayed on the RC-898.

The RC-898 can use one of three time reference modes to show the tape times of the DTRS units connected to it, as shown on the timecode indica- tors [12]: ABS, REL and TC.

ABS refers to the absolute time, as determined from the servo track of the DTRS tape.

TC refers to timecode read from the timecode track of the DTRS unit. However, since the RC- 898 does not accept timecode directly, this need not be actual timecode, but in the case of a DA-98 or DA-88, may be pseudo-timecode, “synthe- sized” from the ABS values (see 8.1.2, “Synthe- sizing timecode from ABS times”).

REL refers to the time value, relative to a user- defined reference point (see 6.3, “Setting a relative time reference”).

Cue points may be set “on-the-fly” or entered manually, and copied from a cue list. All cue points may be edited and “trimmed” to frame accuracy.

For faster entry and editing, cue points may optionally be displayed and edited to second accu- racy, ignoring the “frames” field.

6.2 Setting the precision

The RC-898 typically displays to frame-based precision (although in fact, the location and syn- chronization is to sample precision).

However, it is not always necessary to work to this degree of accuracy, and you may want to save a

little time by ignoring the “frames” field when entering and locating to location memories.

NOTE

The location and synchronization accuracy is not affected by this function.

Accordingly, the RC-898 provides you with a way to do this:

1) From the F menu group, move the cursor to FrameDisp and press SELECT:

F r a m e D i s p l a y

on

2)Use the UP or DOWN key to change from on to off.

When frame display is set on, the last two digits of the display will be used for the frames field of location memories, and the RC-898 expects frames to be entered as part of time values. When set to off, the frames field is ignored (i.e. always assumed to be zero).

6.3Setting a relative time reference

This operation is equivalent to pressing the “reset” button on a numerical tape counter to set the value to “0000”. When the RC-898 is in relative mode, the time shown on the TAPE TIME display [13] becomes relative to a zero point which you set. This zero point is referenced to the first DTRS unit in the chain.

1)From the F menu group, move the cursor to DispTime and press SELECT:

D i s p l a y T i m e

A b s o l u t e

2) Use the UP or DOWN key to change Absolute to Relative.

The REL indicator [12] will light to show that the RC-898 is now displaying times in relative mode.

6-1

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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 backupAccessories AccessoriesReference clock in a digital studio 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 Rehearsing the punch recording Setting pre-roll and post-roll timesCrossfade times Performing 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 timecodeMidi Timecode output Fast LTCPark position Video resolve Individual recording status while chasing timecodePlay the master unit D e o R e s o l v e C h i n e O f f E e Advanced timecode functions Controlling the parallel port device External control and settingsControlling GPI devices 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 armingCue-up tally Fast wind speedMMC ID D I / B u s I D C h i n e C e i v e Other Dtrs control functions Menu groups Menu and parameter reference Menu groupsMenu group 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 itemsDimensions SpecificationsSpecifications 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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