User's Manual

Innovator CU0TD-1/CU0RD-1 – CU4TD/CU4RD 8VSB ATSC Modulator
ATSC Transmitter/Regenerative Translator
Instruction Manual, Rev. 2 78
8VSB ATSC Alarms
This section lists all alarms available for the modulator when an ATSC waveform is
loaded. Each alarm is described along with its triggering conditions. The complete set
of alarms is listed below.
Alarm
Index
Alarm Name Alarm description
0 Modulator Restarted A transient Informative alarm that is sent each
time the modulator re-boots or is powered on.
1 Heartbeat A periodic Informative alarm that is sent
periodically at an interval determined by the
system “Heartbeat Pace” parameter.
2 No Input data Alarm is reported when the modulator cannot
detect an input for the high priority channel in
non-hierarchical mode, or for any input in
hierarchical mode.
3 10 MHz Reference Loss Alarm is reported when an external 10MHz
reference signal is not detected. Alarm is
only valid in SFN mode.
4 1PPS Reference Loss Alarm is reported when an external 1PPS
reference signal is not detected. Alarm is
only valid in SFN mode.
5 TCP Packet Loss Alarm is reported when no valid TCP packet
data is decoded from the input stream. Alarm
is only valid in SFN mode.
6 Data Input Too High Alarm is reported when the high priority input
bit rate is too high (shows that the internal
input FIFO is almost full).
7 Up Converter Unlock Alarm is reported when the internal Voltage
Controlled Oscillator (VCO) is unlocked.
8 Input Bitrate Is Out Of Limit Alarm is reported when the input bit-rate is
10% higher or lower than the ideal bit rate
corresponding to the selected mode. Alarm is
only valid in SFN mode.
9 Up Converter
Communication Error
Alarm is reported when there is no
communication between the main controller
and the Upconverter.
10 Stream Unframed Alarm is reported when a hardware mute
condition is detected. i.e. enable/disable SFN
or enable/disable M/H. Alarm is an indication
that there could be a synchronization problem
with the modulator or DTx.
11 Adaptive Precorrector
Communication Error
Alarm is reported when communication
between the modulator board and capture card
fails.
Table 27:8VSB ATSC Modulator Alarms