Tascam DA-98HR Owner's Manual

Also see for DA-98HR: Setup guide Service manual

Contents

Tascam DA-98HR Owner's Manual Manual pdf 66 page image

9 – Operations related to timecode–Chasing to timecode66 TASCAM DA-98HR1 Go to menu group 4, move the cursor toPark Posi (park position) and pressENTER:2 Play and stop the master tape.3 Turn the DA-98HR’s CHASE on, if it is off.4 Use the § or ¶ keys to turn the TESTparameter to on.The DA-98HR rewinds so that the relative dif-ference is zero. When the DA-98HR hasstopped, go on to the next step below.5 Play the timecode master.When the value shown on the screen hasstopped changing and is stabilized, go on to thenext step below.6 Turn TEST to off (§ or ¶ key). The opti-mum park pre-roll time for the timecode mas-ter is now stored.9.6.9 Absolute and relative differenceThe offset as set above (9.6.2, “Setting timecode off-set”) can be called the “absolute difference” betweenthe two times. However, if the slave machine “wan-ders” (actually, this is unlikely), the offset (theoreti-cal difference) will not be equal to the absolutedifference. The “relative difference” is expressed asbelow:Relative difference = Absolute difference – OffsetThus, if the offset is set on a slave machine to+00:10:00:00 (10 minutes) and while chasing, thetwo machines’ counters read as follows:the slave is now 10 minutes and 4 frames behind themaster.Since the slave is meant to be exactly 10 minutesbehind the master, the difference, +4 frames, is the“relative difference” between the master and theslave.To view the absolute and relative differences betweenmaster and slave machines:1 Go to group menu E:2 Move the cursor to either Abs Diff(absolute difference) or Rel Diff (rela-tive difference). The appropriate value isshown on the bottom line of the display screen.9.6.10 Rechasing timecodeWhen timecode is received, the DA-98HR can eitherconstantly monitor the internal off-tape timecode (orthe synthesized equivalent as set in 9.2, “Tape time-code mode”) and the external timecode, issuing“speed-up” and “slow-down” messages to the trans-port to keep itself in sync (rechasing), or it can syn-chronize once and run freely, ignoring the incomingtimecode.While the DA-98HR is re-syncing (speeding up andslowing down), playback output will be muted,unless the clock is set to INT). Usually you shouldfind that the DA-98HR does not need to rechase,however, and you can leave it in free-running mode.If the timecode master tape includes a break in thetimecode, though, you may want the DA-98HR torechase the master.P a r k P o s i t i o nT E S To f f 0 2 s 0 8 f 2 5 FMaster 10:15:12:12Slave 10:05:12:08E x t T C ˘ A b s D i f fT a p e T C R e l D i f fG e n T C A B S T i m e0 0 : 0 0 : 0 0 : 0 4 2 5 FMasterSlave (offset set to+00:10:00:00)Tape counter shows:10:05:12:08but should be10:05:12:12Tape counter shows:10:15:12:12Absolute difference =0010 00 04Relative difference =00 00 00 04