Section 8.2 - Advanced timecode functions
1)From menu group 5, move the cursor to OutTc Src and press SELECT:
O u t p u t T C S o u r c e
M a c h i n e 1
1)From menu group 8, move the cursor to Fs Shift and press SELECT:
F s S h i f t M o d e
M a c h i n e 1
T a p e ( T C T r a c k )
o f f
2)Use the UP and DOWN keys to select between the four options available:
TAPE (TC | Outputs the timecode as recorded on |
Track) | the dedicated timecode track. |
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TAPE | Outputs the timecode as synthesized |
(ABS) | from the ABS subcode, with all off- |
| sets, etc. as set up in 8.1.2, “Synthe- |
| sizing timecode from ABS times”. |
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External | Timecode received at the timecode |
(reGen) | input is regenerated and output. |
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External | Timecode received at the timecode |
(reshape) | input is filtered and retransmitted. |
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8.2.2 Synchronization of timecode
88When timecode (including MTC) is output from a DTRS unit, it may be synchronized to either the analog or digital outputs, depending on which is in used at the time. This is necessary because of the nature of the
1)From menu group5, move the cursor to OutTc Tmg, and press SELECT:
O u t p u t | T C | T i m i n g |
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D i g i t a l » » » » » | » | ||
A n a l o g |
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M a c h i n e 1 | 2 3 4 5 6 |
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2)Use the UP and DOWN keys to select either digital or analog synchronization for the output timecode.
8.2.3 Pull up and pull down
When using DTRS units in NTSC telecine situa- tions, it may be necessary to adjust the sampling frequency fractionally, as the NTSC frame rate of
29.97and the cinema frame rate of 24 do not form a neat mathematical ratio.
The sampling frequencies of 44.1kHz and 48kHz are therefore affected when the material is trans- ferred back to film.
Accordingly, the pull up and pull down functions are provided to allow the adjustment of sampling frequencies to
2)Use the UP and DOWN keys to select one of the following settings:
off
Pull Down 30NDF Pull Up 29.97NDF Pull Up29.97DF
98Pull Down 30DF
If this setting is anything other than off on one or more DTRS unit, the PULL UP/DN indicator
[10]of the
NOTE
If you want to use the Fs Shift function, make sure that the reference clock is set to Video or Int (see 7.2.6, “Clock selection”). If the reference clock is Word,
although the setting can be made, the Fs Shift func-
tion will not be enabled.
8.2.4 Error bypass
When a DTRS unit is chasing timecode from an external source, the source timecode may drop out for a few frames or be otherwise discontinuous. To allow for this, a “flywheel” facility is provided, which allows the DTRS unit to continue for a set period until timecode is received again. The fly- wheel period may be set for either 10 frames or 30 frames, in the following way:
1) From menu group 4, move the cursor to ErrByPass and press SELECT:
E r r o r B y p a s s |
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M a c h i n e | 1 |
1 0 F r a m e
2)Use the UP and DOWN keys to select between 10 and 30 frames for the “flywheel” period.
8.2.5 Rechase mode
98The