User's Manual Part 3

Screen Service SDT 501 UB-C ARK 1-T Operations
May, 2010 v 1.0 Page 3 - 33
3.4.3 Modes switching rules
Four switching rules are provided in order to cover different requirements:
• Manual: switch between mode A and mode B by selecting one mode using the
Manual Selector. The selected mode is always enabled until the user selects the
other one.
• Auto: switch between mode A and mode B using the rules shown in the
following table. One mode is enabled until at least one of the alarms associated
to the enabled automatic switch rules is rising, then a countdown starts and, if
the parameter doesn’t regain a normal status during the timeout, the device
switches to the other mode.
Table 5. Autoswitch rules
Mode Autoswitch rules
TX DVB-T
No Input: selected TS input not locked. No input Alarm should be
enabled in the RF Off alarms mask. It is associated to the No Input alarm.
No MIP: MIP packets, in SFN and SFN Local transmission modes, not
present in the selected TS. No MIP Alarm should always be enabled in
the RF Off alarms mask. It is associated to the DVB-T No MIP alarm.
Tx Analog
(B,G /
PAL)
No Input: selected SDI input not locked. No input Alarm should be
enabled in the RF Off alarms mask. It is associated to the No Input alarm.
• Opto: switch between mode A and mode B by selecting one mode using the
Opto 1 input with the following rules:
o 1 – Open: Mode A.
o 0 – Closed: Mode B.
• Time: switch between mode A and mode B at the specified Date and Time. Switching
will happen only one time from A to B. In order to set the Switching Time, select hours,
minutes, seconds, days, months and years, and click on up/down arrows to
increase/decrease them.
3.4.4 HP/LP INPUT
These commands allow the setting of the seamless parameters and monitoring of the
seamless status for Not Hierarchical Modulation (High Priority) and Hierarchical
Modulation (High Priority and Low Priority).
The following table shows all the commands and indicators available.
following table shows all the commands and indicators available.