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Model 8010TM-IRIG SDI Time Code Master with IRIG Reader Manual
3.4.4. Jam Syncing the Generator to the Reader
Pressing the JAM key transfers the active reader's time into the generator clock, then releases the
clock to run on its own. This mode is known as 'momentary Jam sync'. (See section 3.5.1 for
information about selecting the active reader.)
The generator time may be continuously slaved, or 'Jam synced' to data coming from the active 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 3.7.9.1) for a full
description of the parallel remote control inputs.
Jam sync mode should be used when you need to generate D-VITC that follows an LTC source time
code. In this mode the 8010TM-IRIG will function as an LTC to D-VITC translator. (8010TM only)
Jam sync mode should be also 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.
When the time information is being jammed the generator and active reader's 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 active reader's 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 section 3.4.12 for a full description of the NO CODE JAM modes.)
The drop frame and colour frame modes of the code being read are transferred to the generator during
jam sync. The formatted modes return when the Jam sync mode is terminated.
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.
3.4.5. Time Date Mode
In time date mode the 8010TM-IRIG puts date and time zone information into the user bits. It is
capable of displaying time/date information in either the Universal Coordinated Time (UTC) or the local
time that has been adjusted with the appropriate time zone offset from UTC. In local time mode, the
generator encodes the time and date adjusted for the local time zone offset from UTC. In local time
mode, the time is also adjusted for Daylight saving time when the DST TIME menu setting is set to On.
In UTC mode, the generator encodes the UTC time and date.
OPERATION
Page 3-10
Revision 1.4.1
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