User's Manual Part 3

Screen Service SDT 501 UB-C ARK 1-T Operations
May, 2010 v 1.0 Page 3 - 95
Alarm Description and limitations Troubleshooting
• Verify that fans are not damaged; if they are, then substitute them.
The substitution can be performed during device normal operations
Input Not present Alarm
Seamless improper working warning
One or both Seamless logic input of the current mode isn’t
locked.
This alarm is enable only in Tx DVBT mode
• Check connection status of physical input associated to logic input
• Check type and source of input associated to logic input
• Hardware fault
GPS Lock
GPS signal is not lock.
Alarm raising limitations:
The monitoring of this alarm is disabled when GPS is not
used as clock reference or when the GPS Communication
Error is raised.
• Check cable and GPS antenna connections
• Hardware fault
GPS Communication Error
Communication errors between ARK1-T main board and
GPS board.
Alarm raising limitations:
The monitoring of this alarm is disabled when GPS is not
used as clock reference.
• Hardware fault
Signal 10 MHz Lock
10 MHz is not locked.
Alarm raising limitations:
The monitoring of this alarm is disabled when GPS is used
as clock reference and a GPS alarm (GPS lock, GPS
• If the Network’s Transmitters Synchronization is SFN, check the
frequency reference: it should be other than internal