7800 Multiframe Manual
7825DSK2-LG(-HD)(-3G) 3G/HD/SD Dual Downstream Keyer
Page 5-12
Revision 2.0
RCP OPERATION
5.6.3.
Configuring the Real Time Clock
The 7825DSK2-LG(-HD)(-3G) contains a real time clock that is used to drive the clock display logos
that can be placed on the screen. This battery backed up real time clock (known as RTC) free runs on
an internal oscillator and can be set from the front panel. When the 7825DSK2-LG(-HD)(-3G) is
powered up with a valid video input, a separate clock (known as the UTC) is initialized from the RTC
and maintains Universal Coordinated time (UTC) accurately from the video input so that it will not drift.
The 7825DSK2-LG(-HD)(-3G) automatically updates the RTC clock from the UTC clock to minimize
long term time drift. In order to keep the UTC clock in sync with your house master time code it
should also be locked to incoming linear time code connected to the LTC IN connector. The UTC
clock time is internally maintained as Universal Coordinated Time (UTC) but can also be adjusted for
time zone offsets from UTC and for daylight saving time, and displayed as local time (Local). The
Time Setup
sub-menus of the
General
setup menu are used to configure the real time clock and
display the UTC and Local times.
5.6.3.1.
Displaying the Local Time
GENERAL
This menu item is used to display the clock time as local time. (UTC time
adjusted for the time zone offset and DST adjustment). The time displays
are always shown in the 24 hour time format.
Time Setup
Local 12:34:50
5.6.3.2.
Displaying the UTC Time
GENERAL
This menu item is used to display the UTC time clock. The time displays
are always shown in the 24 hour time format.
Time Setup
UTC 12:34:50
5.6.3.3.
Setting the Real Time Clock
GENERAL
This menu item is used to display and set the hardware real time clock in
the 7825DSK2-LG(-HD)(-3G). The time displays are always shown in the
24 hour time format.
When you press the
SELECT
button, the display shows the current real
time clock time which will look similar to the following:
12:34:50
To set the real time clock press the
SELECT
button and the hours digits
will be flashing to indicate that they are in entry mode. Use the
or
buttons to change the hours to the desired value. Then press the
SELECT
button and the minute’s digits will begin flashing to indicate that they are in
entry mode. Set the minutes and seconds in the same way. When you
have entered the correct time press the
SELECT
button to update the
hardware real time clock. The second’s digits will stop flashing and the
time will begin incrementing to indicate that the Real Time Clock has been
set. When you set the hardware real time clock the UTC clock time will
automatically be adjusted.
Time Setup
RTC 12:34:50
