4-1-7 Locking the Time Code Generator to an External Signal

It is possible to lock this unit to an external time code generator, or alternatively to lock an external device to the time code generator in this unit.

•Once the unit is locked to an external time code, color framing is disabled. To apply the color frame lock, first switch the F-RUN/R-RUN switch to R-RUN, then return it to the F-RUN position.

For an explanation of the color frame lock, see the footnote on page 2-4.

Locking this unit to an external time code

1 Turn the POWER switch off.

2 Connect the time code output from the external device to the TC IN connector of this unit, and the video output to the VIDEO IN connector.

See the connections for the first DVW-250/250P in the figure “Example connections for time code locking” (page 4-12).

3 Set the F-RUN/R-RUN switch on this unit to F- RUN.

This locks the time code generator in this unit to the external time code signal.

Once the time code generator has been locked, the time code continues in sync even if the signal is disconnected from the TC IN connector. In this case the accuracy of time code synchronization is determined by the accuracy of the generator of the sync signal for the input video signal. If the signal is then disconnected from the VIDEO IN connector, the accuracy is that of the internal time code generator.

Notes on external locking of the time code generator

•The effect of carrying out steps 2 and 3 of the above procedure with the POWER switch on and a cassette loaded depends on the setting of the MODE switch, as follows:

SAVE: The external lock applies when the tape transport is stopped, recording is paused, and during recording.

PB/EE or PB: The external lock applies only during recording. To apply the external lock at other times, either carry out step 1 above, or press the REC button, putting the unit into E-E mode.

Locking the user bit value to an external signal

First lock the unit to an external time code source, then set the EXT-LOCK/U-BIT switch to ON. This locks the user bit values on this unit to the user bit values included in the external time code.

When the EXT-LOCK/U-BIT switch is set to OFF, the user bit values are not affected by the external signal.

Settings for the output from the TC OUT Connector

The following setup menu items affect the output from the TC OUT connector.

For details of setup menu operations, see Section 6-3 “Setup Menu Settings,” <SYSTEM 2> menu (page 6-4).

“TC OUT” item

This selects either of the following as the output from the TC OUT connector:

GEN: the signal output by the time code generator

AUTO: the signal output by the time code generator

during recording or in E-E mode, and the LTC signal from the tape during playback

“TC DELAY” item

This selects the LTC phase correction for the output from the TC OUT connector as follows:

OFF: the signal selected by the “TC OUT” item without correction

AUTO: the LTC signal adjusted to correspond to the video output

Recording 4 Chapter

Chapter 4 Recording 4-11