TimeLine Lynx Keyboard Control Unit Operating Manual page 141

Regeneration or Jam Sync
About Time Code Readers
Synchronizer Essentials
Keyboard Control Unit
09/08/00
Jam Sync, is a generator function that is a better alternative to
reshaping. It is used to create a new time code that is related to
an existing time code on tape. It is extremely useful for repairing
a break in an existing time code track, or creating a continuous
time code track from an edited or discontinuous track. Code is
read up to the last "good" address. Then the generator uses the
next consecutive address to generate new code.
Figure Appendix A-9. Jam Sync
Jam sync is used extensively in video editing; where different
pieces of tape, each with different time code, are spliced together.
Jam sync provides the resulting program with continuous time
code. TimeLine's Micro Lynx and Lynx both have manual and
automatic jam modes, that quickly and simply let you repair or
create new time code tracks to overcome the problems that are
detected with bad code.
A Wide Band Reader, such as the Lynx Time Code Module or
Micro Lynx, reads time code even at the high tape speeds used for
Fast Forward and Rewind. Wide band reader capabilities are
essential, since SMPTE addresses provide the only accurate
means of locating positions on tape.
If time code on tape becomes unreadable, the TimeLine readers
automatically search for the next best sync source on tape. After
SMPTE, the reader searches for serial time code, then pilot tone,
and finally tach pulses that are derived from the rotation of the
tape machine's capstan motor.
A synchronizer reads time code from two or more machines; then
by manipulating the speed of each machine's capstan, it forces the
two machines to play tape at the same speed. This process is
called locking. The Micro Lynx system offers the following
synchronization mode.
Appendix
A-17