User's Manual

Screen Service SDT ARK 1 ECHO Operations
Jan, 2012 v 1.ATSC_FCC Page 3 - 79
Table 15. Alarms window
Alarm
Description
H/R
(1)
Troubleshooting
RF
mask
(2)
Up converter Osc. Unlock
PLL of the Upconveter board not locked to 120 MHz clock.
H/R

Hardware fault
1
PS 28V out range
Voltage out of range. The range is 20V up to 30V.
H/R

Hardware fault
1
PS Current out of range
The current exceeds the 22 Ampere upper limit.
H/R

Hardware fault
1
Absolute Power Limiter
The output power exceeds the maximum endurable limit.
H/R

Hardware fault
1
Up converter communication error
Communication errors between ARK1 main board and
Up-converter board.
H/R

Hardware fault
1
Temperature High Alarm
Case temperature over 70°C, the maximum endurable
limit.
H/R

Check alarm and warning throesholds

Lower the output power to decrease internal temperature

Check the device airflow

Check fans
0
Temperature Level-3dB
Temperature level goes over the alarm threshold.
The output power is consequently lowered of 3 dBm.
H/R
0
Temperature High Warning
Temperature level goes over the warning threshold.
H/R
0
Forward Power High
FWD power goes over the maximum endurable limit.
H/R

Hardware fault
1
Forward Power Low Alarm
FWD power level goes over the alarm threshold.
H/R

Check alarm and warning thresholds

At every amplifier initialization the FWD power alarm and warning
are temporary on

Amplifier is not properly working, hardware fault
0
Forward Power Low Warning
FWD power level goes over the warning threshold.
H/R
0