
Model 5601MSC
Model 5601MSC Master SPG/Master Clock System
MASTER CLOCK
Revision 2.2
Page - 99
4.4.1.2. Setting the LTC Output Frame Rate and IRIG
OUTPUT
This menu item sets the frame rate and counting mode of the LTC output. In
order to maintain a correlation to real time when using timecode rates that
do not run at real time, they must be resynchronized to the system time
once per day. The
Set Jam Time
menu item is used to set the time when
the re-synchronization will occur. This time should be chosen so that
timecode disruptions will have the least effect in the television plant (See
section 4.4.1.3).
Select
30 FPS
to generate timecode that counts at 30 frames per second
and has a bit rate of 2400 bits per second. This LTC will run at exactly real
time and is often used for driving master clock systems. This timecode will
be asynchronous to video sync pulse outputs in the NTSC-M, 1080i/59.94,
and 720p/59.94 video standards.
Select
29.97 FPS
to generate timecode that counts at nominal 30 frames
per second and has a bit rate of approximately 2397 bits per second. This
LTC will run approximately 86.3 seconds per day slower than real time. This
timecode will be synchronous to video sync pulse outputs in the NTSC-M,
1080i/59.94, and 720p/59.94 video standards.
Select
29.97DF FPS
to generate timecode that counts at a nominal 30
frames per second using the SMPTE Dropframe counting sequence and
has a bit rate of approximately 2397 bits per second. This LTC will run
approximately 2.6 frames per day faster than real time. This timecode will
be synchronous to video sync pulse outputs in the NTSC-M, 1080i/59.94,
and 720p/59.94 video standards.
Select
25 FPS
to generate timecode that counts at 25 frames per second
and has a bit rate of 2000 bits per second. This LTC will run at exactly real
time and is often used for driving master clock systems. This timecode will
be synchronous to video sync pulse outputs in the PAL-B, 1080i/50, and
720p/50 video standards.
Select
24 FPS
to generate timecode that counts at 24 frames per second
and has a bit rate of 1920 bits per second. This LTC will run at exactly real
time and will be synchronous to video sync pulse outputs in the 1080p/24sF
and 1080p/24 video standards.
Select
23.98 FPS
to generate timecode that counts at a nominal 24 frames
per second and has a bit rate of approximately 1918 bits per second. This
LTC will run approximately 86.3 seconds per day slower than real time. This
timecode will be synchronous to video sync pulse outputs in the
1080p/23.98, and 1080p/23.98sF video standards.
If the
IRIG
option is installed, selecting
IRIG
will generate IRIG-B timecode
in the format chosen by the
Irig Mode
menu item. The amplitude of the IRIG
signal can be controlled by the
Output Level
menu item. See section 2.3.5
for more information on the IRIG formats available.
LTC 1
Frame Rate/Irig
23.98 FPS
24 FPS
25 FPS
29.97 FPS
29.97DF FPS
30 FPS
IRIG
Содержание 5601MSC
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