Figure 4-4. SYNC TIME OPERATIONAL DIFFERENCES

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The NCS radio, and only the NCS radio, uses the "FH-M" MODE

NCS CONTROL

position. In this mode, the NCS radio automatically brings the time of

all net radios back into synchronization every time the NCS transmits.

In short, when an operator is monitoring the operational net, there is

little or no possibility that your radio will drift out of proper sync time.

Remember that the SINCGARS radio can transmit or receive on only

OTHER NETS

one channel at a time. In order to keep your radio in sync with nets

other than your operational net, you need to check into or monitor each

of the other nets at least once every 24 hours.

With the fielding of the Precision Lightweight GPS Receiver (PLGR), all

COMMON SYNC TIME

units have been provided a ready source of highly accurate GPS time.

By opening all nets on GPS time and updating NCS RT sync time to

GPS time daily, all nets of a division, corps, or larger force are

continuously kept within the +/- 4 second window required for FH

communications. When common sync time is maintained, there is no

need to enter or monitor another net to remain within that net's sync

time. Any net you need to enter, whether a part of your loadset or not, is

readily available without concern for sync time.

Operational differences in terms of sync time are shown in Figure 4-4,

DIFFERENCES

below.

Figure 4-4. SYNC TIME OPERATIONAL DIFFERENCES

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