Link 16 Practice Test

What happens if the NTR decides to change the network time?

Non-NTRs will automatically reacquire Fine Sync without action. The NTR must drop out via L16 STBY ON and reenter as NTR with the desired MIDS TIME. The network time change has no effect on non-NTRs. The network will shut down.

Correct Answer:

The NTR must drop out via L16 STBY ON and reenter as NTR with the desired MIDS TIME.

Explanation:

In a Link 16 network, timing is centralized and the NTR controls the MIDS network time that all participants synchronize to. When the NTR decides to change the network time, the network must re-synchronize to that new value. The proper way to implement this is for the NTR to drop out using the standby command and then re-enter as an NTR with the desired MIDS TIME. This sequence ensures the NTR restarts its timing state and broadcasts the updated network time so all stations align accordingly. Non-NTR units don’t automatically re-acquire Fine Sync simply because the time changed, and the network isn’t shut down—only the NTR reinitializes and disseminates the new time.

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