TM ll-5895-1412-12&PREFERENCE INFORMATION (CONT’D)NET - An organization of stations capable of direct communications with eachother using a common frequency or channel.NET CALL SIGN - A call sign which represents all stations within a net.NET CONTROL STATION (NCS) - A station designated to control traffic andenforce circuit discipline with a given net.NET RESTRICTION - A frequency restriction placed on a-net. Up to eightrestrictions may be applied to a given net.The restrictions are designatedby a letter code in the range A-P.Each letter identifies the explanation ofhow the net is restricted.PRIMARY NET - The net used under normal operating conditions.PYROTECHNICS - Ammunition containing chemicals that produce a smoke orbrilliant light in burning, used for signaling or for lighting up an area atnight.RETRANSMISSION - Employment of a radio communication set for the purpose ofrebroadcasting a message on a different frequency simultaneously with theoriginal broadcast by means of an electrically operated linkage device betweenthe receiver and transmission of the net.RETRANS NET - The net assigned to a retrans (radio relay) operation.SIGNAL OPERATION INSTRUCTIONS (S0I) - A series of orders issued for technicalcontrol and coordination of the Signal operations of a command or activity.It provides guidance needed to insure the speed, simplicity and security ofcommunications.The SOI normally contains call sign assignments, frequencyassignments, suffixes, signs and countersigns, pyrotechnic and smokeand complete supplemental instructions. See CEOI description.SUFFIX - A two-digit number (01 through 99) used in conjunction withtactical organization’s call sign to indicate a specific position, mifunction.Suffixes may be further expanded by letters to identify aelement of the position, mission, or function identified by the suffSINCGARS - Single Channel Ground and Airborne Radio System.TIME PERIOD - That length of time during which a specific call sign,and frequency is used.signalsassion orsub-X.suffixTRANSEC KEY(S) - A set of bits that, when properly loaded into the SINCGARSradio, provides the hopping sequence through the frequency hopset that theradio uses in the frequency-hopping mode.UHF - Ultra High Frequency (225.00-400.00 megahertz).VHF-AM - Very High Frequency-Amplitude Modulation (108.00-150.00 megahertz).VHF-FM - Very High Frequency-Frequency Modulation (30.000-87.975 megahertz).1-12
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