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AN/ARC-201 SINCGARS

The Army Single-channel Ground and Airborne Radio System (SINCGARS) operates in the 30.000 to 87.975 MHz frequency range. Early ground versions of SINCGARS consist of a receiver-transmitter (RT-1439) supported by external COMSEC equipment assembled with other common modules into manpack and vehicular configurations. These radios are known as non-integrated COMSEC (non-ICOM) since they require the TSEC/KY-57 security equipment for cipher text (CT) operation. Newer production ground SINCGARS receiver-transmitters (RT-1523 series) are known asintegrated COMSEC (ICOM). They have an internal module that performs the cipher functions; thus, they do not need the external KY-57 equipment. However on the other hand,

The Army airborne SINCGARS radio (AN/ARC-201/A) requires use of the TSEC/KY-58 security equipment for CT operation. All three versions of the airborne radio handle voice; only the data bus version (RT-1478) handles data through use of a data rate adapter (DRA). Both ICOM and non-ICOM versions of the radio are operationally compatible in FH and CT operations.

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