User's Manual
ISO 9001:2000 Cert. N°4500/1
Version 1.1 SDT_ARK6_User_Manual_ENG_vATSC Page 101 of 206
Alarm
Description and limitations
Troubleshooting
Mode(2)
RF mask (1)
GPS Not Locked
GPS signal is not locked by either the OCXO
or the GPS receiver.
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
C
1
GPS Dialog Err
Communication errors between main board
and
GPS board.
The monitoring of this alarm is disabled when
GPS is not used as clock reference.
Hardware fault
C
1
120MHz Not Locked
120 MHz is not locked.
The monitoring of this alarm is disabled when
the Signal 10 MHz Not Locked alarm is raised
or when GPS is used as clock reference and
GPS alarm (GPS Not Locked, GPS Dialog
Err) is raised.
In SFN configuration, when selected TS input
or MIP are not detected, 120 MHz oscillator
can lose the lock
Hardware fault
C
1
960MHz Not Locked
960 MHz is not locked.
Hardware fault
C
1
Input PLL Not Locked
Input PLL not locked alarm
Hardware fault
C
1
Output PLL Not
Locked
Output PLL not locked alarm
Hardware fault
C
1
Bad File In File
System
One or more of the following files are not
present in the File System:
Check files list
C
1