evertz 8010TM, Instruction Manual

Page: 40 / 98

Model 8010TM SDI Time Code Master Manual
Page 3-10
Revision 1.5.1
OPERATION
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 will function as an LTC to D-VITC translator.
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.
3.4.4.1. Jam Syncing At Specified Time
The JAM@ register can be used to specify a Reader Time at which a momentary jam will occur. The
JAM@ register can be viewed and set from an extended display by pressing
SHIFT+DISPLAY as
described in section 3.2.1. To change the value stored in the JAM@ register, use the ENTER and
CLEAR keys in conjunction with the numeric keys. Enter a valid time into the desired register following
the same method used to enter the generator time.
When the JAM@ register is displayed, press the
SELECT key to cycle through the various ‘arm’ modes
of this event register. Pressing the SELECT key can ‘disarm’ the event register. A blank ‘ ’ will be
shown to the left of the hours digits of the display when the register is disarmed. Pressing the SELECT
key again will ‘arm’ the event register for continuous events. A lower case ‘
c
’ will be shown to the left of
the hours digits of the display when the register is armed for continuous events. When the event
register is armed for continuous event mode, a jam event will occur
each time the comparison matches
the register’s time setting. Pressing the SELECT key again will ‘arm’ the event register for single event
mode. A lower case ‘s’ will be shown to the left of the hours digits of the display when the register is
armed for single events. When JAM@ register is armed for single event mode, the jam event will occur