Sony PCM-3348HR, Operation Manual

Page: 138 / 256

7-12
Chapter 7 Synchronized Operations
Chapter 7
Error indication during chase operations
Error indications in the LOCATE TIME display
Indication Problem Action to be taken
no in tc The external time code Input the external
is not input. time code.
no Pb tc There is no time code Prestripe the tape
on the tape on the being used, or use
slave unit. a) another tape which
has already been
prestriped.
a) Even if a prestriped tape is used, “no Pb tc” may
momentarily appear accompanying the variation of tape
transport during chase operation. This is not a problem.
7-2-8 Synchronized Operation
with Video Equipment Using
the Time Code Chase
Function
This technique uses a composite video signal input to
the video equipment and PCM-3348HR as a reference
signal. The video equipment supplies the PCM-
3348HR with a time code signal. Using the time code
chase function in this case means that the PCM-
3348HR tape first synchronizes to the time code, and
then runs in synchronization with the composite video
signal. You can select either chase mode, address
mode or free mode, depending on the application.
• Using address mode
After first synchronizing to the external time code,
the composite video signal is then used for
synchronization, but if there is a discrepancy between
the external time code and the playback time
code,
the unit re-synchronizes. When the discrepancy is
removed, the unit returns to synchronization by the
composite video signal.
• Using free mode
After first synchronizing to the external time code,
the time code chase operation terminates. Thereafter
the tape runs on the PCM-3348HR in synchronization
with the composite video signal.
TAPE
RECORDER
REMOTE-3
REFERENCE
VIDEO
INPUT
VIDEO REF
INPUT
TIME
CODE
OUTPUT TIME
CODE
INPUT
Connections
Connections for synchronized operation with video equipment
PCM-3348HR switch settings
Switch Setting
REC MODE INSERT
SYNC CLOCK VIDEO
75
Ω
(for REFERENCE VIDEO When terminated: ON
INPUT connector) When not terminated: OFF
Timer display mode TIME CODE
TIME CODE selection switch EXT
Carrying out recording
Press and light the REC READY button for the
channel or channels to be recorded.
After first synchronizing with the external time code,
hold down the REC button, and press the PLAY
button. The channel or channels for
which the REC
READY button is lit will start recording.
Notes on operation
• The video equipment time code and PCM-3348HR
time code formats must be the same.
• When configuring a system using digital I/O, if you
use the vari- sync function, the PCM-3348HR word
sync signal frequency will vary and the word
synchronization for other connected equipment
will
also be lost.
7-2 Time Code Chase
Composite video signal
RM-3348HR
PCM-3348HR
Time code signal
Video equipment