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TM 11-5821-333-12
CHAPTER 3
NCS OPERATING PROCEDURES
PAGE
SECTION I.
Loading Operating Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Il.
Net Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Ill.
Other NCS Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7
3-1. SCOPE.
Chapter 3 contains information for the Network Control Station. The procedures pertain only to the NCS and alter-
nate NCS, including complete net opening and net management instructions. The NCS must become familiar
with the contents of Chapter 2, Operator Instructions, before attempting to use this chapter.
Section I. LOADING OPERATING DATA
Subject
Para
Page
General NCS Operating Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
3-1
Loading and Clearing FH Sync Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
3-3
Loading Fill Device from Another Fill Device . . . . . . . . . . . . . . . . . . . . . . . . 3-3
3-2
3-2. GENERAL NCS OPERATING INFORMATION.
The NCS is the manager of the radio net.
In this capacity, the NCS is responsible for making sure all net mem-
bers have the correct data to operate in the net, are entered into the net, and follow proper operating proce-
dures.
The NCS should have an alternate NCS or other designated net member to assist in the operation of the net.
The NCS should be the only one operating with the RT MODE switch in the Frequency Hopping - Master FH-M
position when in PRESET 1-6. The Alternate NCS may operate in the
FH-M mode when in CUE so ERF may
be sent to a radio wanting late net entry.
Special data is used by the RT to operate in FH mode, These data are listed here. They must be the same for all
RTs in an FH net. The operators will not be familiar with these terms.
Refer to any data sent to them as “ERF”,
Net ID. The Net ID is a number which is unique to one net and determines where in the hopset the
hopping sequence will start.
TRANSEC variable or Transmission Security Key (TSK). The term TRANSEC variable is used for Non-
ICOM radio sets. The term TSK is used for ICOM radio sets.
FH sync time. Members in a net must have the same time reference in their radio sets so that frequency
hopping is synchronized..
Each radio is programmed with the FH sync time for standardization.
Hopset. A hopset contains the set of frequencies with which a net is permitted to operate,
Lockout set. This data identifies frequencies that may not be used in any nets because of interference,
etc. If they are needed, they are listed in the Signal Operation Instructions (SOI).
MAN preset frequency. This frequency is used for communications during cold start net opening.
CUE frequency. This frequency lets someone not in an FH radio net to “cue, ‘r or contact, the FH net.
NCS responsibilities include:
Opening and closing a net.
Maintaining net discipline.
Controlling net access.
Knowing who is a member of the net,
Imposing net controls.
3-1
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