LESSON 2
Learning Event 2: OPERATE SINCGARS SINGLE CHANNEL
1.
Situation: You are assigned to 1st Plt, A Co, 54th In Bn. Your unit is to take part in a major
operation requiring single channel secure communications. You have already assembled the
SINCGARS radio set and VINSON communications security equipment. The prearranged net opening
time is near. You must load the necessary single channel information into the RT and be prepared to
respond to the NCS's call.
2.
Let's get right into programming the RT.
a. Preset controls. Prior to start-up the equipment controls must be preset to protect the
equipment during start-up. Remember you must pull to set controls to a position with a square around it.
(1) KY-57 - OFF, for protection during start-up, and for RT self tests.
(2) RT-1439.
(a) DATA - OFF, used when interfacing with data processing equipment and TACFIRE
only.
(b) VOL and DIM controls - Mid range, to be adjusted as needed during operation.
(c) MODE - SC, for single channel operation.
(d) CHAN - MAN, we will start in the Manual Channel, to be adjusted as necessary to
utilize stored frequencies during operation. It is filled for SC and FH operation.
(e) RF - LO, begin with the least power output, adjust as necessary to ensure effective
communications during operation. Set to LO for RT self circuit tests.
(f) FCTN - STW, ensures all previous fill is zeroized. To be adjusted during operation to
cause the RT to function as desired.
b. Test RT circuits. As part of start-up we will cause the RT to perform self tests on internal
(1) Set CB1 to ON on vehicular radio sets. This applies power to the PA Mounting Base and
Mounting Adapter.
(2) Set the FCTN switch to Z-A. The RT will begin performing self tests, when it completes
the tests the display must show "Good" to continue.
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