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GEN DROP FRAME
Drop frame: off
Drop frame: on
Drop frame: convert
Drop frame: jamming
Not applicable
You should not attempt to transfer IRIG time information to the SMPTE time code
generator time when using a 23.976 FPS video standard, as the SMPTE time will not
count at the real time rate that the IRIG time does.
The AUX LTC output will normally output nominal 24 FPS time code that is concurrent
with the nominal 30 FPS timecode on the main LTC. When the main LTC output is in
the Drop Frame counting mode, the AUX LTC output will be muted as there is no 24
FPS equivalent.
3.4.8.1. Conversion Between Drop Frame and Non Drop Frame Counting Modes
In certain circumstances, it may be necessary to convert from the Non Drop Frame counting mode to
the Drop Frame counting mode. For example, material that originated in a 1080p/23.98 format will
have a 24 frame per second time code, which by definition is non drop frame time code. If that material
is subsequently converted to a 1080i/59.94 format the recommended procedure for conversion of the
time code (according to SMPTE 12M) will result in a 30 frame per second non drop frame time code
where the hours, minutes and seconds are aligned with the 24 frame per second code.
broadcast delivery specifications require Drop Frame time code.
counts' in Drop Frame time code, the time code count will diverge from Non Drop Frame time code,
The Drop Frame and Non Drop Frame time codes will only be co-incident at one frame count which
shall be called the "Sync Point'.
OPERATION
HD9010TM-IRIG HDTV Time Code Master / IRIG-B Reader Manual
The GEN DROP FRAME menu item is used to the desired drop frame
mode for the generator.
Select Drop frame off to configure the generator in the non-drop frame
or 'full frame' mode.
Select Drop frame on to configure the generator in the drop frame
mode.
Select Drop frame convert to configure the HD9010TM-IRIG to operate
in a special Drop Frame conversion Mode. This mode is available in
firmware version 2.0 build 138 or later. See section 3.4.8.1 for more
information on using the Drop Frame Conversion Mode.
When the HD9010TM-IRIG is in the continuous Jam Sync mode, the
generator drop frame mode is the same as the incoming time code
data. The Drop Frame sub menu shows Drop frame jamming.
When the HD9010TM-IRIG is in the continuous Jam Sync mode in a
29.97 or 59.94 FPS video standard, and the primary reader is set to the
IRIG reader, the generator drop frame mode will be On so that the time
base is as close as possible to real time. The Drop Frame sub menu
shows Drop frame jamming.
When the HD9010TM is operating in the 24, 25 or 50 frames per
second video standards, the Drop Frame sub menu shows Not
applicable.
Revision 2.1
Because of the 'dropped frame
Some
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