TEAC DA-78HR
Owner's Manual

9 - Operations related to timecode
4 Use the v and w keys to set the offset for the slave DA-78HR, and the SHIFTed v and w keys to move the cursor to the different fields. You can also use the OFFSET key as a right cursor key. The front panel OFFSET indicator will light when an offset value has been set. See 4.3.5, ��Left� and �right� keys� for details of setting values in a time field. You can set the offset to sub-frame (percentage or sample) accuracy. 5 You can also change the sign of the offset value to a minus value by moving the cursor to the appropriate position and using the v and w keys. These functions allow you to measure and test the optimum pre-roll position for the DA-78HR (when it is a timecode slave) to park itself relative to the master timecode device so that it will lock up and start playing quickly. 1 Press the SHIFT key so that the SHIFT indicator is flashing, then press the MENU key until the display shows tc. chs-- (TC CHS-- ). 2 Press the SUB MENU key so that the display shows PARK. POS ( PARK POS) briefly, and then changes to PRK (PRK) followed by the current setting, shown in seconds and frames. 3 Use the v and w keys to adjust the value (maximum is 1 second and 29 frames)

9.6.7 Automatic park position setting
When the DA-78HR is acting as a timecode slave, it can automatically determine the optimum park preroll position to sync with the master. 1 Turn the DA-78HR�s CHASE on, if it is off and make sure that the time mode is set to TC. 2 Press the SHIFT key so that the SHIFT indicator is flashing, then press the MENU key until the display shows TC. CHS-- (TC CHS-- ). 3 Press the SUB MENU key so that the display shows PK. POS. TST ( PK POS TST) briefly, and then changes to OFF (OFF). 4 Play and stop the master tape. 5 Use the v or w key to turn the park test on. The DA-78HR will then rewind so that the relative difference is zero. When the DA-78HR has stopped, go on to the next step below. 6 Play the timecode master. When the value shown on the display has stopped changing and is stabilized, go on to the next step below. 7 Use the v or w key to turn the park test off. The display shows done ( DONE), and the optimum park pre-roll time for the timecode master is now stored.

9.6.4 Cancelling timecode offset
To cancel the offset, simply set the offset value to
00:00:00:00.

1 Enter the offset setting, as described above. 2 Press and hold down the v key and press the w key to reset the value. Timecode offset will now be cancelled and the front panel OFFSET indicator will go out.

9.6.5 Setting timecode offset �on the fly�
As well as entering an absolute number, it is also possible to enter a number �on the fly� as the tapes are playing. 1 Locate the two devices (master and slave DA78HR) so that they have the right offset, either by playing the tapes and pausing them or carry out the next operation while one or both tapes is being played back. 2 On the slave DA-78HR, press and hold the SHIFT key, and press the AUTO IN/OUT (OFFSET ) key at the correct offset time to capture and store the offset. The display will briefly show AT. OFFSET (AT OFFSET), and the current difference between the master unit and slave DA-78HR will be stored as an offset.

9.6.8 Absolute and relative difference
The offset as set above (�Timecode offset� on page 58) can be called the �absolute difference� between the two times. However, if the slave machine �wanders� (actually, this is unlikely), the offset (theoretical difference) will not be equal to the

9.6.6 Park position
When the DA-78HR is slaved to an external timecode source, it will take some time between the master unit starting to play and starting to transmit timecode for the DA-78HR to read.

59 TASCAM DA-78HR