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Page Title: Figure 4-4. SYNC TIME OPERATIONAL DIFFERENCES
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TM
11-5820-890-10-8
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
4-8


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