evertz 5600MSC Series, Инструкция по эксплуатации

Страница: 61 / 128

Model 5600MSC Master Clock/SPG Manual
TECHNICAL DESCRIPTIONOPERATION
Revision 1.6
Page 3-19
Select L1 rate 25.00 to generate time code 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
time code will be synchronous to video sync pulse outputs in the PAL-B,
1080i/50, and 720p/50 video standards.
Select
L1 rate 24.00 to generate time code 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
L1 rate 23.98 to generate time code 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 time code will be synchronous to video sync pulse outputs in the
1080p/23.98, and 1080p/23.98sF video standards.
3.6.1.3. Selecting when the LTC Time is Synchronized to the System Time
OUTPUT
LTC 1 OUTPUT
LTC 1 Jam Time
L1 jam at 00:00
This menu item allows the user to set a time when the LTC 1 output time will
be synchronized to the System Time. This synchronization is necessary
once per day to maintain a long term correlation between the real time
System Time when using time code rates that do not run at real time. When
the
TIME REF is set to Gps time ref the LTC1 output time will have to be
synchronized to the system time to correct for leap seconds.
Enter the hour and minute value for the jam time using a procedure similar
to that in section 3.7.12.
You can also synchronize the LTC 1 output time immediately using the
LTC
1 Jam Now menu item (see section 3.6.1.4). You can also synchronize all
the LTC and VITC time codes immediately using the Jam LTC/VITC Now
menu item (see section 3.6.1.5).
3.6.1.4. Synchronizing The LTC Time to the System Clock Immediately
OUTPUT
LTC 1 OUTPUT
LTC 1 Jam Now
L1 force jam
This menu item allows the user to synchronize the LTC 1 output time to the
System Time immediately. This synchronization will also happen once per
day at the time set using the
LTC 1 Jam Time menu (see section 3.6.1.3).
To synchronize the LTC 1 time immediately, press the
SELECT button
when
L1 force jam
is shown on the display. The front panel display will
show
L1 JAMMED
for 0.6 seconds after the time has been synchronized.
USO
RESTRITO