evertz 5010, Инструкция по эксплуатации

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Model 5010 Time Code Master Manual
Page 4-22
Revision 3.1.1
OPERATING INSTRUCTIONS
4.5.8. Jam Syncing the Generator to the Reader
Pressing the
JAM
key transfers the current reader time into the generator clock, then releases the
clock to run on its own. This mode is known as ‘momentary Jam sync’.
The generator time may be continuously slaved, or 'Jam synced' to data coming from the reader by
pressing the
SHIFT+JAM
keys. The JAM LED will be on when Jam sync is enabled. Pressing the
SHIFT+JAM
keys again terminates the Jam sync mode. An alternate method of controlling the jam
sync mode is to close Jam Sync Enable remote control input to ground. (See section 4.9.1 for a full
description of the parallel remote control inputs)
Jam sync mode should be used when dubbing longitudinal time code from one tape to another, as the
quality of the time code signal deteriorates with each generation, and will become unusable after the
third generation. In applications where the 5010 is used to encode VITC during insert editing, the jam
sync mode enables continuous VITC to be recorded on the edit master tape.
When the time information is being jammed the generator and reader times are compared with each
other during each frame, automatically compensating for the value programmed into the OFFSET
register. If for any reason they are not equal, the jam is bypassed, and the generator substitutes the
next frame number. The JAM indicator will blink off when a jam error is encountered. If the number of
consecutive jam bypass errors exceeds 5, the last valid reader time is jammed into the generator again
with the programmed OFFSET. In the absence of valid reader data within the last 5 frames, the
generator operates according to the programmed NO CODE JAM mode (HOLD = generator stops;
RUN = generator increments normally; or MUTE = generator turns off) until valid reader code resumes.
At this time it will be re-jammed to the reader, thus repairing large dropouts on the reader tape. (See
4.5.14 for a full description of the NO CODE JAM modes.)
The OFFSET register for the Continuous Jam Sync mode allows you to apply a continuous offset
between the generator and reader numbers when you are in continuous Jam sync mode. The value
entered into the Offset register will be added to the reader time before it is jammed into the generator.
Offset values other than 00:00:00:00 usually indicate that the generator is leading the reader. In order
for the generator to lag behind the reader, enter a value equal to 24:00:00:00 minus the lag offset
desired.
Example 1:
Offset: 00:00:01:00
Reader: 01:00:00:00
Generator: 01:00:01:00
Example 2:
Offset: 23:59:59:00
Reader: 01:00:00:00
Generator: 00:59:59:00
"
In order to Jam sync the generator time exactly to the reader time make sure the
OFFSET is set 00:00:00:00