User's Manual

Screen Service SDT ARK 1 ECHO Operations
Jan, 2012 v 1.ATSC_FCC Page 3 - 81
Signal 10 MHz Lock
10 MHz is not locked.
H/R

If the frequency reference is Internal: internal PLL fault

If the frequency reference is External:
o Internal PLL fault
o Lack of external 10 MHz
o Hardware faul

If the frequency reference is Internal:
o Check GPS alarms
o Internal PLL fault
o Hardware fault
1
Signal 120 MHz Lock
120 MHz is not locked.
H/R

In SFN configuration, when selected TS input or MIP are not
detected, 120 MHz oscillator can loose the lock

Hardware fault
1
Signal 960 MHz Lock
960 MHz is not locked.
H/R

Hardware fault
1
Down Converter Osc. Unlock
PLL of the Downconveter board not locked to 120 MHz
clock.
H/R

Hardware fault
1
No RF Input
Input RF missing.
H/R

Check input channel

Check RF input signal type, source and connector
X