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"ACCESSORY 1" PARALLEL
CONNECTOR
SMPTE/EBU Time Code
SMPTE
is an acronym
for the Society of Motion
Picture
and
Television
Engineers.
The
SMPTE
Time
Code
(C98.12:
time and control code for video and
audio tape for 525/30 television system) was defined in
1970, and it is now accepted as a universal standard.
This reference is to an 80-bit digital code developed
by SMPTE
and used to designate the exact location in
hours, minutes, seconds and frames (24 frames/sec. for
film or 30 frames/sec. for video) on a film, video tape, or
audio tape. Suitable equipment can synchronize ("lock
up") two or more
machines by using the SMPTE time
code recorded on each.
SMPTE.
European Standard, that refers to 25 frames
per second, states the EBU (abbrev. for European Broad-
casting Union) time code when it is especially necessary
to distinguish from the USA Standard with 30 frames
per second.
A time code generator is used to record SMPTE code
onto one track of the tape. A time code controller can
then read the code from two or more tape machines, and
by also servo-controlling the reel motors of those ma-
chines, bring them to specifiec cue points. A time code
synchronizer
further
controls
the capstan
motors
to
keep both of the tape machines running synchronously.
These techniques can be used to obtain more tracks for
recording (two or more audio machines "locked up" to-
gether), to mix audio signals in sync with video or film
images, to make complex edits by transferring material
from one or more audio machines to another, and so
forth.
Connecting a Synchronizer to the TASCAM TSR°8 -
Connection
between the ES-50 synchronizer/ES-51
edit controller
and
the TSR-8
is a plug-and-go
pro-
position. Pre-wired interface cables needed are available
from TASCAM.
The TASCAM
TSR-8 provides signals to the synchro-
nizer
(via the
ACCESSORY
"1"
connector)
which
indicate its speed, the direction of the tape travel, and a
reference power supply. Also, tally signals indicating the
TSR-8's mode
(PLAY,
F.FWD,
REW, STOP)
are given
to the synchronizer so it knows the current transport
status. Inputs on the same ACCESSORY ''1"' connector
are provided for status commands from the synchronizer
(PLAY,
F.FWD,
REW, STOP,
REC, LIFTER
CONT).
Also, there
is an input for a capstan drive reference
frequency
signal
from
the synchronizer
so that the
actual
record/play
speed
can
be varied
to maintain
synchronization. For pin assignment see page 12.
The
TSR-8
will
also operate
satisfactorily
with
a
variety of other manufacturers' synchronizer/controllers.
The manual for these products should provide you with
enough interface information for use with the TASCAM
tape
machines.
Or
else,
consult
the
synchronizer
manufacturer for further details on interfacing.
11
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