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the GEN COLOUR PHASE item of the Engineering menu.
Special precautions should be taken when operating in the continuous jam sync
mode.
When the colour frame mode is selected, and the code from the reader does not
have the colour flag set, the generator will maintain a 2 field lock only.
If the 8010TM-IRIG generator is being operated in the colour frame mode, and the
reader code has the colour flag set, the jam sync process will compare the colour
framing of the reader code against the generator. If the colour framing of the two do
not agree, the JAM indicator will flash on and off at a regular rate. Therefore, if the
playback VTR does not have a colour framer built in, the 2 field mode of operation
should be selected.
3.4.15. Generator Parity Mode Selection
The purpose of the phase correction parity bit (LTC bit 27 in NTSC, 59 in PAL) is to compensate for
phase reversals in the LTC bi-phase mark modulation that could occur when code inserts are
performed. Use of the bi-phase mark parity bit is optional as some readers may not recognize its
presence.
GEN LTC PARITY
Ltc parity off
Ltc parity on
OPERATION
Model 8010TM-IRIG SDI Time Code Master with IRIG Reader Manual
The GEN LTC PARITY item controls the parity mode of the generator.
Select Ltc parity off to configure the generator for the non parity mode.
The bi-phase mark parity bit will be always set to zero.
Select Ltc parity on to configure the generator for the parity mode. The
bi-phase mark parity bit will be put in a state where every 80 bit word
will contain an even number of logic zeros, in order that the
magnetization transient between bit cell 79 of one word and bit cell zero
of the next shall always be in the same direction.
Revision 1.4.1
Page 3-18
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