User manual

DTS Broadcast PDH Microwave Digital Radio User Manual
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7.2 Switching Conditions and Operation
The protected system provides link continuity in the event that a fault occurs in the primary radio.
The switch is activated by an alarm condition in the primary link. The following alarm conditions will
trigger a switch from primary to secondary IDU:
1. Loss of lock on transmit signal
2. Loss of transmit power
3. Frame loss (Receive)
4. BER alarm
5. DC power loss
6. Cable fault
7. Low receive level
The switch is activated by an alarm condition in the primary link. See table 7-1 switch alarm
Condition
Table 7-1 switch alarm condition
7.3 Protection switch
The key component to protected system operation is the Protection Switch. All service cards (4E1,
8E1, 16E1 and 10/100base-t) are mounted in protection system.See Figure 7-2.
Figure 7-2 IDU protection systems